The stars which will take the shortest time to go from the earliest protostar stage to the main sequence is: the star ten times the mass of our sun.
The correct answer choice is option b.
What is meant by the stars?A star can simply be defined as a luminous body which is usually, frequently and most of the time found in the night sky. However, a star is a also an incandescent body just the like the sun and it is in a fixed point. Below are some few characteristics of the star:
A star is massiveA star is a celestial bodyA star shines by radiation A star is held together by gravityA star also produce Its own lightIt also produce its own heat energy.In conclusion, it can be deduced from the explanation given above that stars are luminous and highly massive bodies.
Complete question:
Which of these stars will take the shortest time to go from the earliest protostar stage to the main sequence?
a. the star which has the same mass as our sun
b. the star ten times the mass of our sun
c. the star six times the mass of our sun
d. none of the above
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by how many diopters should the power of his eye be reduced in laser vision correction to obtain normal distant vision for him? take 2.00 cm as the focal length of a normal relaxed eye lens (and also the distance of the retina from the lens) - that means a power of 50 d.
20 diopters approx should the power of his eye be reduced in laser vision correction to obtain normal distant vision for him.
The optical power of a healthy human eye is about 40 diopters, or the ability to focus on a picture or object that is 1/40 of a meter distant from the eye. An additional 20 diopters of correction can be made to the eye of a typical young person. By the age of 25, this focusing flexibility frequently decreases to 10 diopters. The human eye typically has 1 diopter of refractive error by the age of 45 as a result of lens hardening and the natural deterioration of the eye muscles that focus your vision. Blurred up-close vision is caused by presbyopia, or the eye's deteriorating ability to focus its lens correctly, which calls for the usage of corrective lenses. Reading glasses compensate for the loss of the natural focusing power of the eye. An optometrist may recommend a lens to increase the eye's magnification capability, often in steps of 1/4 diopter throughout a range of 1 to 3 diopters.
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A peron lift a 4. 5 kg cement block a vertical ditance of 1. 2 m and then Carrie’ the block horizontally 7. 3 m. Determine the work done by the peron and by the force of gravity
The person's work is positive, with a rating of 52.92 J.
Gravity's work is negative, with a value of -52.92 J.
define distance ?
Distance is a numerical or sometimes qualitative measurement of the distance between objects or points. In physics or everyday use, distance can refer to physical length or estimate based on other criteria (e.g. "two particles above"). Since spatial perception is a rich source of conceptual metaphors in human thought, the term is also often used metaphorically to refer to a measure of the degree of difference between two similar objects ( such as the statistical distance between probability distributions or the distance between text strings) or the degree of separation (as illustrated by the distance between people in a social network). Most concepts of distance, both physical and metaphorical, are formalized in mathematics using the concept of metric space.
m = 4.5 kg is the mass of a cement block.
The block raises the vertical distance by d=1.2m.
d' = 7.3 m is the horizontal distance covered by the block.
Since the person raises the block, there is some displacement of the block. As a result, the individual will accomplish good job. And the person's work is saved in the form of block potential energy.
w=mgd
=4.5x9.8x1.2
=52.92 J
As the gravity will oppose the block's motion, thus it will produce negative work on the block. Therefore,
Gravity's work = - (Work done by person)
Gravity work = - 52.92 J
Thus, gravity's work is -52.92 J.
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Radio waves travel at a speed of 1.7×10^8m/s through ice. a radio wave pulse sent into the antarctic ice reflects off the rock at the bottom and returns to the surface in 32.9×10^−6s. How deep is the ice?
The depth of the ice = 74.8 m.
From the question, we have
Radio waves travel at a speed of 1.7×10^8m/s through ice.
Let x be the time going down
(32.9 × 10^-6) - X be the time going back.
X = VoT + (1/2)AT^2
V = D/T.
(1/2)(9.8 m/s^2)(4 - X)^2 = (1.7 × 10^8 m/s)x
x = 4.40 × 10^-7
The depth of the ice = 74.8 m.
Radio waves :
Electromagnetic radiation includes radio waves. Compared to visible light, a radio wave has a far longer wavelength. Radio waves are frequently used by humans in communication. To send and receive radio frequency energy, this radio tower features both circular and rectangular antennas.
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Assume the elevator has a mass of 800kg and is slowing down as it descends at a rate of 2m/s². What is the tension in the cable?
Answer:
Below
Explanation:
It is under the acceleration of gravity at 9.81 m/s^2 and then it starts braking and adding to this at 2 m/s^2 Total = 11.81 m/s^2
F = ma
F = tension = 800 kg * 11.81 m/s^2 = 9448 N
the threshold of hearing is defined as the minimum discernible intensity of the sound. it is approximately 10−12w/m2 . find the distance d from the car at which the sound from the stereo can still be discerned. assume that the windows are rolled down and that each speaker actually produces 0.06 w of sound, as suggested in the last follow-up comment.
the distances d from car that the stereo's sound can still be 97720.5 m Then, we need to determine how much further away it is in order to calculate its actual size. An thing appears smaller from a distance.
What do you call a distance?Distance, which is a scalar quantity, describes "however much area an entity has covered" while moving. An object's total change in position, or displacement, is a vector number that indicates "how out of place any object is."
The relationship between distance and sound intensity heard at a distance is (the power of sound just at source surface area of a wall of an imagined circle at the range in question).
I = P/4πd²
P = 0.06 W 2 = 0.12 W d = if the vehicle has two speakers.
I = 1012 W/m2 1012 = 0.12/4 d2 d = 97720.5 m is the formula for the loudest audible sound.
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A 70-kg base runner begins his slide into second base when he is moving at a speed of 4. 0 m/s. The coefficient of friction between his clothes and earth is 0. 70. He slides so that his speed is zero just as he reaches the base. (a) how much mechanical energy is lost due to friction acting on the runner? (b) how far does he slide?.
a. The runner loses 560 J of mechanical energy as a result of friction.
b. the distance that the runner slides is equivalent to J. 1.2 m.
Mass = 70.0 kg
Speed = 4.0 m/s
Coefficient of friction = 0.70.
Acceleration due to gravity, g = 9.8 m/s².
a. We would compute the change in kinetic energy to estimate the amount of mechanical energy lost due to friction acting on the runner:
The formula: gives the shift in kinetic energy mathematically.
ΔK.E. = 1 ÷ 2 m(v - u)²
When the parameters are added to the formula, we get,
ΔK.E. = 1 ÷ 2 × 70 × (4 - 0)²
ΔK.E. = 1 ÷ 2 × 70 × (4)²
ΔK.E. = 35 × 16
ΔK.E. = 560 Joules
560 Joules of mechanical energy
b. To gauge the runner's slide's distance:
We would first determine the runner's acceleration.
Acceleration = ug
Acceleration = 0.70 × 9.8
Acceleration = 6.86 m/s²
For distance,
V² + U² = 2as
4² + 0² = 2(6.86)s
16 = 13.72s
Distance, S = 1.2 meters.
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assume that your mass is 54.5 kg . calculate how much radiative energy will be produced by the accretion disk as a result of your fall into the black hole.
The radiative energy will be produced by the accretion disk as a result of your fall into the black hole is 4.9×10¹⁷J.
Simply put, what is radiation energy?The definition of radiation is energy that leaves a source and travels at the speed of light through space. An electric and magnetic field are present along with this energy, which has wave-like characteristics. Another name for radiation is electromagnetic waves.
Imagine that you were trapped into a supermassive black hole by an accretion disk. The disk radiates 10% of your mass-energy as you descend.
E = mc²
m = 54.5 kg
c = 3×10⁸ m/s
E = 54.5 × (3 × 10⁸)²
E = 4.9×10¹⁷J.
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what is the difference between the speed of an object and the acceleration of an object?
The difference between the speed of an object and the acceleration of an object are as follows:
Speed is the distance covered in the unit of time whereas acceleration is the rate of change in the speed.Speed is the scalar quantity on contrary acceleration is the vector quantity.Speed is determined by distance and time whereas acceleration is determined by the velocity and time.Speed can remain constant in every case but acceleration is not uniform in every case except for circular motion.Speed is related to the rate of motion only whereas acceleration is related to the direction of motion as well along with the rate of motion.Speed is calculated with displacement whereas acceleration is calculated with velocity. Speed = Distance/Time and Acceleration = Speed/TimeThe SI unit of speed is m/s and acceleration is m/s^2.To know more about speed visit:
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If the forces acting on an object are balanced, what must be true about the motion of this object?.
If the forces acting on an object are balanced, so it doesn't cause a change in motion.
The effect of force on the motion of objects1. Force on a stationary object
This force occurs when there is an impulse that is done in the opposite direction with the same force. Then each object emits a force. But because the directions of the forces are opposite to each other, the total force becomes smaller or cancels each other out.
2. Force on moving objects
In this style, when two people push an object together, the position of the object can shift. That's when there is motion caused by more than one force. The forces on objects become mutually reinforcing, so the resulting force becomes greater. Forces that are in the same direction will increase the total force.
3. Force on an object that causes a change in the direction of motion
When someone rides a bicycle then turns the direction of movement. It happens that there is a tensile force and muscle force that deflects the bicycle handlebar. When playing the ball can change the direction of the ball caused by kicks, throws, or punches from players. Then the player exerts a force on the ball that causes the ball to change direction. So here the force plays a role in changing the direction of a moving object.
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which of these stars will take the shortest time to go from the earliest protostar stage to the main sequence?
a star ten times the mass of our Sun.
Which kind of star will remain a star for the longest?A star ten times as big as the sun will last for just 20 million years just on main sequence, compared to the sun's about 10 billion years.When compared to the known universe age at 13.8 million years, the red dwarf, which has half the mass of the sun, has a lifespan of 80 or 100 billion years.
What kind of star does have the lowest atmospheric pressure?Stars with very low masses called red dwarfs.They therefore have low fusion rates, low pressures, and consequently low temperatures.
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a baseball is thrown from center field to home plate where it is caughe by the catcher. at what point in its travel is the magnitude of the baseball's accelration at a minimum?
Acceleration is constant during entire trajectory.
What is acceleration?Any procedure where the velocity varies is referred to as acceleration. There are only two ways to accelerate: changing your speed or changing your direction, or changing both. This is because velocity is both a speed and a direction.Given that,A baseball caught by the catcher which is thrown by the center fielder of same shoulder level. During this whole journey the path followed by a ball is parabolic.
Therefore, ball is in projectile motion.
Let height of shoulder level = h
During projectile motion acceleration of the ball always acts in vertically downward direction of magnitude g, and in there is no acceleration in horizontal direction. Therefore, during projectile motion acceleration is always constant during whole trajectory. So, acceleration is constant during entire trajectory.
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what is the potential difference across the headlight bulbs when the starter motor is operated, requiring an additional 39 a from the battery? answer in units of v.
The starter motor's potential difference across the headlight bulbs is 38.45V, requiring an additional 39 a from the battery. Voltage, also known as potential difference.
It is sometimes described as the amount of work needed to move a test charge between two sites, expressed as a unit of charge. Volt is the potential difference's SI unit (V). We only take into account the charge between the locations P and Q when current moves between them in an electric circuit. Electric potential difference between two sites is referred to as voltage, also known as electric pressure, electric tension, or (electric) potential difference. an electric field that is static.
Vh = I*Rn
Vh = 39/5.476*5.40v
Vh = 38.45v
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what is a name for the marked angle? five rays. one ray starts at point a, then points down and to the left through point b. a second ray starts at point a, then points up and to the left through point e. a third ray starts at point a, then points up through point f. a fourth ray starts at point a, then points up and to the right through point d. a fifth ray starts at point a, then points down and to the right through point c. an orange curved line connects ray ad to ray ac.
The marked angle is also known as an OBTUSE angle or an ACUTE angle.
What does an angle go by?Basic angles are identified by their names: acute, obtuse, right, straight, reflex, and full rotation. By uniting two rays at their termini, a geometrical shape known as an angle is created.
What does an indicated angle go by?One of three ways can be used to name an angle. An angle can be identified by one of three ways: by its vertex, by its three points (the middle point must be the vertex), or by a letter or number placed inside the angle's aperture.
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Answer:
/EAD
Explanation:
thats the answer if ur doing khan
Which type of energy is associated with the position and motion of an object *?
Mechanical energy is associated with the position and motion of an object. Potential energy is associated with the position of an object, and kinetic energy is associated with the motion of an object.
Potential energy and kinetic energy are two kinds of mechanical energy. Potential energy is due to the position, shape, or height of an object. For example, the energy stored in a coiled spring, the energy stored in a water tank at height, and energy in charges due to their relative positions to each other.
The kinetic energy in an object is due to its motion—for example, energy in flowing water and blowing wind.
At a point of time, the total mechanical energy in an object remains constant. Potential and kinetic energy transforms into one another and thus keep total mechanical energy in an object constant.
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the moon has a mass of 1×1022 kg, and the gravitational field strength at a distance r from the planet is 0.001 n/kg. what is the gravitational force exerted on the moon while it is in orbit around the planet?
The gravitational force exerted on the moon of mass 1×10²² kg is 1×10¹⁹ N.
What is gravitational force?Gravitational force is the universal force of attraction, which is acting between objects.
To calculate the gravitational force exerted on the moon, we use the formula below.
Formula:
F = mE............... Equation 1Where:
F = Gravitational force exterted on the moonm = Mass of the moonE = Gravitational field strength of the moonFrom the question,
Given:
m = 1×10²² kgE = 0.001 N/kgSubstitute these values into equation 1
F = 1×10²²×0.001 F = 1×10¹⁹ NHence, the gravitational force exerted on the moon is 1×10¹⁹ N.
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Hhow much energy is required to remove a proton from 157n ? the masses of the atoms 157n , 146c and 11h are 15.000109 u , 14.003242 u and 1.007825 u , respectively.
The energy required to remove a proton from ¹⁵N₇ is 10.2046375 MeV.
What is proton?
Proton is a subatomic particle with a positive charge. It is found in the nucleus of an atom, along with neutrons. Protons have a mass of 1.0073 amu, and their charge is equal to the charge of an electron, but opposite in sign. The protons in an atom are responsible for the atom's atomic number, which is the number of protons in the nucleus. Protons are what makes atoms of different elements different from each other. For example, the element hydrogen has one proton in its nucleus and the element helium has two protons. Protons are also responsible for holding together the nucleus of an atom, as their positive charges repel each other and keep the nucleus together.
The reaction to remove the proton is given as follows :
¹⁵N₇ ----> ¹⁴C₆ + H
The mass of ¹⁵N₇ = 15.000109
the mass of ¹⁴C₆ = 14.003242
The mass of H = 1.007825
The energy requires to remove a proton is given as:
E = ( 14.003242 + 1.007825 - 15.000109) u
E = 0.010958 × 9312.5 MeV
E = 10.2046375 MeV
Thus, energy is required to remove a proton from ¹⁵N₇ with the masses of the atoms ¹⁵N₇, ¹⁴C₆ and H are 15.000109 u, 14.003242 u, and 1.007825 u, respectively is 10.2046375 MeV.
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global temperatures are forecast to rise about 3°c by the year 2100. which parts of the world are expected to experience the greatest temperature rise?
The global temperatures are forecast to rise about 3°C by the year 2100. the parts of the world are expected to experience temperature rise is Artic.
The global temperature increases because of the reason that is the carbon dioxide and the heat is trapped in greenhouse gases that will produce by the human activities. The increase in the global temperature will effect the around the world differently . the global temperature since 1880 is 1 degree Celsius.
Thus, the artic part of the world expected to experience temperature , if the global temperature rise about 3 °C by the year of 2100.
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What event made it possible for photons to begin to travel freely through the universe when the universe was about 380,000 years old?
The event which made it possible for photons to begin to travel freely through the universe when the universe was about 380,000 years old is the universe hаd expаnded аnd cooled enough for electrons to combine with nuclei to form neutrаl аtoms.
How did the first chemical element appear in the universe?The universe begаn 13.8 billion yeаrs аgo, аnd the cosmic microwave background (CMB) dаtes bаck to аbout 400,000 yeаrs аfter the Big Bаng. Thаt's becаuse in the eаrly stаges of the universe when it wаs just one-hundred-millionth the size it is todаy, its temperаture wаs extreme: 273 million degrees аbove аbsolute zero.
Аny аtoms present аt thаt time were quickly broken аpаrt into smаll pаrticles (protons аnd electrons). The rаdiаtion from the CMB in photons (pаrticles representing quаntums of light, or other rаdiаtion) wаs scаttered off the electrons. Thus, photons wаndered through the eаrly universe, just аs opticаl light wаnders through а dense fog.
Аbout 380,000 yeаrs аfter the Big Bаng, the universe wаs cool enough thаt hydrogen could form. Becаuse the CMB photons аre bаrely аffected by hitting hydrogen, the photons trаvel in strаight lines. Cosmologists refer to а "surfаce of lаst scаttering" when the CMB photons lаst hit mаtter; аfter thаt, the universe wаs too big. So when we mаp the CMB, we аre looking bаck in time to 380,000 yeаrs аfter the Big Bаng, just аfter the universe wаs opаque to rаdiаtion.
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two coils are at fixed locations. when coil 1 has no current and the current in coil 2 increases at the rate 15.0 a/s, the emf in coil 1 is 25.0 mv. (a) what is their mutual inductance? (b) when coil 2 has no current and coil 1 has a current of 3.60 a, what is the flux linkage in coil 2?
their mutual inductance is 1.67mH, and the flux linkage in coil 2 is 6.00mWb.
(a)Equation E=−M(dt₂/di) yields
M=∈₁ /∣di2 /dt∣=25.0mV/15.0A/s =1.67mH
(b)Equation M₂₁(dt₁/di)=N₂(dΦ₂₁/dt) leads to
N₂ Φ₂₁=Mi₁=(1.67mH)(3.60A)=6.00mWb
Flux refers to any effect that seems to pass through or move through a surface or substance, whether it actually moves or not. A notion in applied mathematics and vector calculus called flux has a lot of uses in physics. Flux, a vector quantity that describes the size and direction of a substance or property's flow, is used to describe transport processes. The perpendicular component of a vector field over a surface is defined as the surface integral of a scalar variable called flux in vector calculus.
The definition of flux in terms of transport states that it can either be a single vector or a vector field or a function of position. The latter situation makes it simple to integrate flux across a surface.
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two planets have the same surface gravity, but planet b has twice the mass of planet a. if planet a has radius ra, what is the radius of planet b?
The radius of planet B is [tex]\sqrt{2[/tex] times the radius of planet A.
What is Law of Universal Gravitation ?
Thus it states that bodies with mass attract each other with a force that varies directly as the product of their masses and inversely as the square of the distance between them.
The surface gravity of a planet is given by
g = GM/R²
where
G is the gravitational constant
M is the mass of the planet
R is the radius of the planet
For the two planets in the problem, we have:
gA=gB (same gravity)
MB=2MA (planet B has twice the mass of planet A)
So we can write
GMA/R²A=GMB/R²B
MA/R²A=2MB/R²B
R²B=2R²A
→ RB = √2RA
so, the radius of planet B is √2 times the radius of planet A
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according to kirchhoff's current law, the sum of the currents entering a closed surface must equal the sum of the currents leaving. explain how the law is satisfied for the closed surface shown when we use a real op amp in this circuit.
Taking into mind the OV 1 kNXų Closed Surface 2 mA currents in the ground connections and power supply connections of a real op amp, KCL is satisfied.
The algebraic sum of all currents entering and leaving a node must equal zero, according to Kirchhoff's Current Law, also known as KCL.
This law is used to explain how a charge travels to and from a wire junction or node. With this knowledge, let's look at an illustration of the legislation in action, its significance, and how it came to be.
Since no charge is lost, the total current flowing into a junction or node equals the charge leaving it. To put it another way, every current entering and leaving the node must have a zero algebraic sum. This Kirchhoff law property, where I(exit) + I(enter) = 0, is known as charge conservation.
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a perfect unit impulse is applied to a sdof system at rest, having a mass 250 kg, stiffness 3000 n/m and damping ratio 0.2. the initial velocity of the system is:
The damping frequency is 12.68 rad/s.
Given data
mass = 250 kg
stiffness = 3000 n/m
damping ratio = 0.2
to find out
damped natural frequency of the system
solution
we first find the natural frequency that is express as
natural frequency ω = √k/m ..............1
here k is stiffness and m is mass
so ω = √3000/250 = √120
ω = 12.95 rad/s
so
damping frequency will be
damping frequency = ω × √(1 - r²) .....................2
here r is damping ratio
damping frequency = 12.95 × √(1-0.2²)
damping natural frequency = 12.68 rad/s
Therefore, the damping frequency is 12.68 rad/s.
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Scientists on earth are able to communicate with rovers on mars through their receivers, which can receive and process signals. Which of these best describes the signals sent and received by rovers?.
The best describes the signals sent and received by rovers are electromagnetic waves.
Depending on the planet's position, it generally takes about 5 to 20 minutes for a radio signal to travel the distance between Mars and Earth. Using an orbiter to relay messages is beneficial because it is much closer to perseverance than a deep space network (DSN) antenna on Earth.
It takes 5 to 20 minutes for communication to reach Mars from Earth and vice versa. Rovers and landers on the surface of Mars emit radio signals to spacecraft orbiting Mars, which relay radio waves to Earth. This is where the signal is received by a global system of radio antennas called the Deep Space Network.
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if r is the radius of the earth and g is the gravitational acceleration at the earth's surface, what is the gravitational acceleration at altitude h above the earth's surface?
The gravitational acceleration at altitude h above the earth's surface is g.R^2/(R+ h) ^2.
What is gravitational acceleration ?In physics, gravitational acceleration is the speed at which a body falls freely in a void (and thus without experiencing drag). This is the constant acceleration brought on just by the gravitational pull. Gravimetry is the measurement and study of these rates. All bodies accelerate at the same rate in vacuum, independent of their masses or compositions.The combined effects of gravity and the centrifugal force from Earth's rotation determine the strength of Earth's gravity at a fixed place on its surface.
Let, gₙ be the acceleration due to gravity at height h.
gₓ be the acceleration due to gravity at depth x.
The acceleration due to gravity on the surface of Earth is
g= GM/R^2
where,R is the radius of Earth,M is mass of Earth and G is gravitational constant.
∴g ∝ 1/R^2
gₙ ∝ 1/(R+ h) ^2
thus gₙ/g = R^2/(R+ h) ^2
Hence
gₙ = g.R^2/(R+ h) ^2
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A person is driving his Lamborghini with a mass of 2,000 kg at 10 m/s. He sees a police car around the corner and slows down to 2m/s. What is his change in momentum? ________kgm/s
The change in the momentum of the person is 16,000 kg m/s.
What is the change in momentum of the person?
The change in the momentum of the person driving the Lamborghini is calculated by applying the following formula as shown below.
ΔP = m ( u - v )
where;
ΔP is the change in momentumm is the mass of the Lamborghini u is the initial speed of the personv is the final speed of the person after slowing downΔP = m ( u - v )
ΔP = 2,000 kg ( 10 m/s - 2 m/s )
ΔP = 2,000 kg ( 8 m/s)
ΔP = 16,000 kg m/s
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tarzan grabs a vine hanging vertically from a tall tree when he is running at (a) how high can he swing upward? (b) does the length of the vine affect this height?
Tarzan's initial energy will be Ei = 1/2 mv² so that he can swing upward.
Kinetic energy is the energy that moving objects have. Tarzan possesses kinetic energy when he runs at v mph. He swings by grabbing a vine. When his kinetic energy is totally turned into potential energy, he climbs to a maximum height of h.
Create an expression to represent Tarzan's initial kinetic energy Ki.
Ki = 1/2 mv²……(1)
Tarzan's mass is m, and his velocity is v as he grabs the vine.
If the gravitational potential energy zero is on the ground, the initial gravitational potential energy Ui is given by
Ui = 0 ……(2)
Tarzan's kinetic (Ei) energy and potential energy are added together to form his initial energy.
Ei = Ki + Ui ……(3)
Write an expression for Tarzan's initial energy using equations (1) and (2) in equation (3).
Ei = 1/2 mv²……(4)
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A mass is connected to a spring and is allowed to move horizontally. The mass is at a position L when the spring is unstretched. The mass is then moved, stretching the spring, and released from rest. It then moves with simple harmonic motion. At the instant that the mass passes through the position where the spring is unstretched, what can be said about its instantaneous acceleration?
A mass is connected to a spring and is allowed to move horizontally. The mass is at a position L when the spring is unstretched. The mass is then moved, stretching the spring, and released from rest. It then moves with simple harmonic motion.
At that instant instantaneous acceleration is 0.
If an object's velocity changes, it is said to have been accelerated. An object's velocity can alter depending on whether it moves faster or slower or in a different direction. A falling apple, the moon orbiting the earth, and a car stopped at a stop sign are a few instances of acceleration. Through these illustrations, we can see that acceleration happens whenever a moving object changes its direction or speed, or both.
Since acceleration has both a magnitude and a direction, it is a vector quantity. It is also the first derivative of position with respect to time or the second derivative of position with respect to time.
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a particle, mass 6 kg, moves along the y axis with a speed of 2.4 m/s. it experiences a force of 12 n directed along the x axis. what power is imparted to the particle by the force
The power is imparted to the particle by the force is 28.8 Watts.
How can force be converted into power?Power is calculated as force times the distance traveled while applying the force, or force times velocity. (However, this only functions when the velocity is constant; that is, when the force is not the resultant force on the moving object).
The amount of power produced for a given mass of a substance or machine is known as power per unit mass, also known as specific power. This is referred to as the power to weight ratio when applied to an engine or vehicle.
Power = F × v
Power = 12×2.4
Power = 28.8 Watts.
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4. a force f is exerted on a 7 kg block to move it across a rough surface, as shown. the magnitude of the force is initially 6 n, and the block moves at a constant velocity. while the block is moving, the force is instantaneously increased to 15 n. how much kinetic energy does the block now gain as it moves a distance 3 m?
The block now gains as it moves a distance of 3 m the Kinetic Energy is 27Nm.
15N-6N=9N
3m x 9N=27Nm
In physics, the kinetic energy of an item is the strength that it possesses due to its movement. Its miles described because the work had to boost up a frame of a given mass from rest to its said speed. Having gained this energy for the duration of its acceleration, the body maintains this kinetic electricity unless its speed changes. An equal quantity of Work is done through the frame when decelerating from its present-day pace to a kingdom of rest. officially, kinetic power is any term in a device's Lagrange which includes a derivative with appreciation to time.
In classical mechanics, the kinetic energy of a non-rotating object of mass m journeying at a pace v is 1/2 mv². In relativistic mechanics, this is a good approximation only when v is a great deal much less than the speed of light. the same old unit of kinetic energy is the joule, while the English unit of kinetic electricity is the foot-pound.
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If today is October 31st and we view a third quarter, on what date did we observe
the last new moon?
If it's October 31 and we can see a third quarter, then means we can see the last new moon, which was on October 10.
What does the moon mean?The Moon, the largest and brightest satellite in our night sky, stabilizes the Earth's axial wobble, which results in a generally constant climate. This makes Earth a rather more livable planet. Moreover, it brings about tides, which produce a pattern that has aided people for countless years.
How is the moon made?Approximately 43% of the moon's surface is made up of oxygen, 20% of it is silicon, 19% is magnesium, 10% is iron, 3% is calcium, 3% is aluminum, 0.42% is chromium, 0.18% is titanium, and 0.12% is manganese. Traces of water that may have come from far beneath have been discovered by orbiting spacecraft on the lunar surface.
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