According to Newton's third law, For every action there is an equal and opposite reaction.
What is Hubble's law?
A) The longer the time period between peaks in brightness, the greater the luminosity of the Cepheid variable star.
B) The recession velocity of a galaxy is directly proportional to its distance from us.
C) The recession velocity of a galaxy is inversely proportional to its distance from us.
D) The faster a spiral galaxy's rotation speed, the more luminous it is.
E) The faster a spiral galaxy's rotation speed, the less luminous it is.
Option B The recession velocity of a galaxy is directly proportional to its distance from us is the correct option.
Hubble-Lemaître law
The Hubble-Lemaître law, sometimes referred to as Hubble's law, is the finding in physical cosmology that galaxies are eloping from Earth at rates proportionate to their separation. In other words, they are travelling away from Earth more quickly the more away they are. The redshift of the galaxies—a shift in the light they emit toward the red end of the visible spectrum—has been used to calculate their velocities.
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Suppose that the period is T. Which of the following points on the t axis are separated by the time interval T?
K and L
K and M
K and P
L and N
M and P
The points on the t axis separated by the time interval T are K and P.
The true choice is C.
In Physics, a period is the length of time it takes for one oscillation or one wave to occur. The symbol for the period is T with units of seconds or seconds (s).
K and P are one wave on the transverse wave. One wave is a combination of one hill and one valley. While K and M are defined as half waves.
Water waves, rope waves, and light waves. is a wave whose direction of propagation is parallel to the direction of vibration.
In longitudinal waves, one wave consists of one stretch and one density.
This question is accompanied by a picture
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a 0.5 kg car is moving at a constant velocity 5 m/s. What is the kinetic energy of the car?
find the velocity v of the block as a function of time. express your answer in terms of some or all of the variables: k , m , a , and t .
The velocity of the block as a function of time is [tex]v(t) = - A \sqrt{\frac{k}{m}} (\: sin \: \sqrt{\frac{k}{m}} t)[/tex]
Look at the attachment to see the picture of the block. The block is attached to a spring and placed on a frictionless surface. Simple harmonic motion applies to the system. The equation of the position as a function of time for the system
x(t) = A cos ωt
A = the amplitudet = the time interval ω = the angular frequencyx = the positionThere is the force of the spring in the system, according to Newton's second law
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Energy stored as a result of deformation of an elastic object
A.Thermal Energy
B.Chemical Potential Energy
C.Elastic Potential Energy
D.Energy Transfer
Elastic potential energy is the energy stored as a resulting of the applying a force to deform an elasticity object.
What is elastic potential energy?Elastic potential energy is the energy stored as of a result of applying a force to the deform an elasticity object. The energy is the stored until the force is to the removed and the object by springs back to it's own shape, doing work in the process.
Elastic potential energy is the energy stored as a result of the applying by a force to the deform an elasticity of object. The energy is stored by it's until the force is the removed and the object of the springs back to its own original shape, doing their work in the processing. There are deformations could involve compressions, stretching or the twisting of the object.
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Does anyone know the assets to this ?
Answer: The net force equals the mass times the acceleration so answer 1 would be 16N (4x4). Does that help at all?
Explanation:
in 1990 walter arfeuille of belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth.
In 1990 Walter areole of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth, the total force is 2.76 kN.
What is force?
An object having mass changes its velocity in response to a push or pull. Force is an external agent that has the power to alter a body's resting or moving condition. It has a size and a movement.
What is distance?
The entire movement of an object, regardless of direction, is called distance. Distance can be characterized as the quantity of ground covered, regardless of the starting or finishing points of an object.
a)Work done = m*g*h
where g = acceleration of gravity = 9.8 m/s2
h = 17.1 cm = 0.171 m
So, W = 281.5*9.8*0.171 = 471.8 J
b)Total force exerted,
F = mg = 281.5*9.8 = 2758.7 N = 2.76 kN
Therefore, in 1990 Walter areole of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth, the total force is 2.76 kN.
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Define power and discuss how to determine power.
Power is the rate at which work is done or energy is transmitted. In other words, it is a measure of the amount of work that can be done in a given amount of time. Power is typically measured in watts, where one watt is equal to one joule of energy per second.
To determine power, you need to know the amount of work being done and the time it takes to do that work. For example, if a machine lifts a weight of 100 joules in 2 seconds, the power of the machine is 100/2 = 50 watts.
Another way to determine power is to measure the rate at which electrical energy is being transferred. In this case, power is calculated by multiplying the voltage of the electrical current by the current itself. For example, if an electrical current has a voltage of 10 volts and a current of 5 amps, the power would be 10 x 5 = 50 watts.
It is important to note that power is not the same as energy. While power is a measure of how quickly work is done or energy is transferred, energy is a measure of the total amount of work that can be done or the total amount of energy that can be transferred.
Answer:
power is the amount of energy transferred or converted per unit time. The formula is P = E/t, where P means power, E means energy, and t means time in seconds. This formula states that power is the consumption of energy per unit of time.
here's the answer for everyone :)
Answer:
b
Explanation:
Answer:
Explanation:thx
A copper cable is 1.2 km long and has a cross-sectional area of 5 mm^2. Find its resistance at 80°C if at 20°C the resistivity of copper is 0.02*10^-6ohm m and its temperature coefficient of resistance is 0.004/°C
The resistance of the copper wire at 80°C is r = 5.952 ohms
Given copper cable length is 1.2 km
The area of cross section given is 5 mm^2
Thus the equation for resistivity is:
p (t) = p (0) × ( 1 + a × ( change in temperature )
p(t) = 0.02 × 10^-6 × ( 1 + 0.004 × 60 )
p (t) = 2.48 × [tex]10^-^8[/tex] ohm m
r = ( p × l ) ÷ a
r = ( 2.48 × [tex]10^-^8[/tex] × 1200 ) ÷ 5 × [tex]10^-^6[/tex]
r = 5.952 ohms
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if the angle opf elevation of the cannon is decreased from 35 degrees to 30 degrees, the ertical compent of the balls iontial veclotiy will
Answer:
Decrease
Explanation:
Decrease
Vertical component = v sin (angle)
sin 30 is less than sin 35
У Z Eright left A parallelepiped is in an electric field which, to the left of the dashed line, has the value Eleft =< -55.37,0,0 > N/C, and Eright =<55.37,0,0 > N/C to the right of the dashed line. The top and bottom of the parellelepiped are rectangles lying in the x - z plane, and measure li by l2, as shown. The left and right faces are rectangles inclined by an angle 0 = 83.48° from the a axis, and measure l2 by l3. The values of l1, l2, and l3 are 23.82 cm, 11.27 cm, and 32.48 cm, respectively. What charge is contained inside the parallelepiped?
A rectangle possesses all the characteristics of a parallelogram since it has two sets of parallel sides and two pairs of opposite sides that are congruent. A rectangle is always a parallelogram because of this.
How many edges are there on a parallelepiped?
Congruent and parallel faces are found in pairs. Eight (8) vertices and twelve (12) edges make up the parallelepiped. The parallelepiped's edges can be divided into three (3) sets of four (4) edges each, where each set's edges are parallel and all have the same length. A zonohedron is the parallelepiped as well.
How many faces are there on a parallelepiped?
A parallelepiped is a six-faced, three-dimensional structure with a parallelogram-like pattern on each face. It contains 12 edges, 6 faces, and 8 vertices. Rhomboid, cuboid, and cube are all variations on the parallelepiped.
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Due to the wave nature of light, light shined on a single slit will produce a diffraction pattern. Green light (525 nm) is shined on a slit with width 0.415 mm.
(a) Find the width of the central maximum located 1.65 m from the slit.
(b) What is the width of the first order fringe?
Yes, it will produce a diffraction pattern.
a. 3.9 mm b. 1.95 mm
Explanation:
The light shined from a single slit will produce a diffraction pattern because, the wavefront act as wavelets which generates its own wave according to Huygens principle. This therefore causes the diffraction pattern.
Given
wavelength of green light, λ = 520 nm = 520 × 10⁻⁹ m = 5.20 × 10⁻⁷ m
width of slit, d = 0.440 mm = 0.44 × 10⁻³ m = 4.4 × 10⁻⁴ m
Distance of slit from central maximum , D = 1.65 m
Distance of first minimum from central maximum, y = ?
a. The relationship between the slit width and wavelength is given by [tex} dsinθ = mλ [/tex]where d = slit width, θ = angular distance from central maximum, λ = wavelength of light and m = ±1, ±2, ±3...
The relationship between y and D is given by
Since θ is small, sinθ ≈ θ ≈ tanθ
so, dθ = mλ ⇒ θ = mλ/d = y/D
Therefore, y = mλD/d
Now, for the first minimum above the slit, m = +1 and for the first minimum below the slit, m = -1. So, y₁ = λD/d and y₋₁ = -λD/d. So, the width of the central maximum Δy is the difference between the first minima below and above the central maximum. So, Δy = y₁ - y₋₁ = λD/d -(-λD/d) = 2λD/d
Substituting the values from above, Δy= 2 × 5.20 × 10⁻⁷ × 1.65/4.4 × 10⁻⁴ = 3900 × 10⁻⁶ m = 3.9 × 10⁻³ m = 3.9 mm
b. The first order fringe is the fringe located between the first minimum and the second minimum. From dsinθ = mλ and tanθ = y/D when θ is small, sinθ ≈ θ ≈ tanθ. So, y = mλD/d. Let m= 1 and m=2 be the first and second minima respectively. So,y₁ = λD/d and y₂ = 2λD/d. The difference Δy₁ = y₂ - y₁ is the width of the first order fringe.
Therefore, Δy₁ = 2λD/d - λD/d= λD/d.
Substituting the values from above, we have
λD/d= 5.20 × 10⁻⁷ × 1.65/4.4 × 10⁻⁴= 1.95 × 10⁻³ m = 1.95 mm
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Suppose your bicycle tire is fully inflated, with an absolute pressure 4.00 x 10^5 Pa at a temperature of 15.0 °C. What is the pressure after its temperature has risen to 40.0 °C? Assume that there are no appreciable leaks or changes in volume.
The pressure after the temperature has risen to 40.0 °C, assuming that there are no appreciable leaks or changes in volume is 4.35×10⁵ Pa
How do I determine the pressure at 40.0 °C?From the question given above, the following data were obtained:
Initial pressure (P₁) = 4.00×10⁵ Pa Initial temperature (T₁) = 15 °C = 15 + 273 = 288 K New temperature (T₂) = 40 °C = 40 + 273 = 313 KVolume = ConstantNew pressure (P₂) = ?The pressure the temperature has risen to 40 °C can be obtained as follow:
P₁V₁ / T₁ = P₂V₂ / T₂
Volume = contant
P₁ / T₁ = P₂ / T₂
4.00×10⁵ / 288 = P₂ / 313
Cross multiply
P₂ × 288 = 4.00×10⁵ × 313
Divide both sides by 288
P₂ = (4.00×10⁵ × 313) / 288
P₂ = 4.35×10⁵ Pa
Thus, the pressure at 40 °C is 4.35×10⁵ Pa
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DOO
Ransit
If the two objects above are traveling at the same speed, which has more momentum?
O The car, because its shorter
O The truck, because its taller
O The car since it has less mass
O The truck, since it has more mass
Answer:
truck, since it has more mass
Explanation:
truck, since it has more mass
formula:
momentum (p) = mass (m) times velocity (v)
height has nothing to do with it
A 441 N crate is being pulled by a rope, up a frictionless
inclined plane, which meets the horizontal at an angle of 35°.
Find the magnitude of normal force acting on the crate.
The crane weighs 441 N. The horizontal component of the normal force at an angle of 35° is 361 N.
What is force?Force is physical quantity generating a displacement or deformation for a body. Force is having a magnitude and direction thus, it is a vector quantity.
The normal force acting on a body is mg, that is the product of its mass and acceleration due to gravity. Force can have a vertical and horizontal component.
vertical component of normal force = N sin ∅
horizontal component = N cos ∅.
Given the angle in the inclined plane is 35° in horizontal direction.
Thus normal force = 441 N × cos 35° = 361 N.
Therefore, the magnitude of normal force acting on the crane is 361 N.
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Question 16 of 20
A zinc atom contains 30 protons, 35 neutrons, and 30 electrons. What is the
atomic mass of zinc?
A. 65 amu
B. 95 amu
C. 60 amu
D. 35 amu
SUBMIT
Answer: 65 amu
Explanation: Proton+ Neutron
John's home had 20 pounds of condiments. sugar made up 40% of the condiments. Salt made up the rest. After some sugar was used, sugar made up 25% of the condiments. How many pounds of sugar were used? pounds of sugar
3 pounds of sugar were used.
What are percentages?Percentage can be calculated by dividing the value by the total value, and then multiplying the result by 100.
How to find the amount of sugar used;
40% of sugar + 60% of salt = 20 pounds of condiments
Therefore 40% of sugar = (40/100) x 20
Sugar = 8 pounds
Therefore;
Salt = 20 - 8 pounds
Salt = 12 pounds
For sugar to make up 25% of the condiments;
Sugar = (25/100) x 20 pounds
Sugar = 5 pounds
The amount of Sugar used;
Sugar = 8 - 5 pounds
Sugar = 3 pounds
The amount of sugar used up is 3 pounds.
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a homogeneous cylinder of radius r and height h floats at the interface of two fluids with densities. if p2
The pressure differential between the cylinder's top and bottom is expressed as
Δp=gH/2(Pa+Pb)
define homogeneous ?
A homogeneous population is one that is made up of components or pieces that are all of the same sort; it is not heterogeneous.
Mathematics.
possessing a common quality throughout: a homogenous solid figure.
A homogeneous equation has all terms of the same degree.
when each variable is multiplied by that constant, the function of numerous variables gets multiplied by some power of that constant: x2y3 is a degree 5 homogeneous expression related to a differential equation in which a linear combination of derivatives is set to zero.
As we know, the weight of the cylinder balances the force due to pressure.
As a result, we will have
F=mg
so we have
Δpπr^2=mg
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what is the mass of a ball that has a kinetic energy of 105j and is traveling at 10 m/s?
Answer:
The mass of the object is 21 kg.
Explanation:
To find the mass of an object with a given kinetic energy and velocity, you can use the formula for kinetic energy, which is KE = 1/2 * m * v^2, where m is the mass of the object, v is its velocity, and KE is its kinetic energy.
In your case, the velocity is 10 m/s and the kinetic energy is 105j, so you can solve for m by rearranging the formula to solve for mass.
This gives you m = 2 * KE / v^2, or m = 2 * 105j / 10^2, which means the mass of the object is 21 kg.
Find the area of one page of a book whose dimensions are 20 cm × 25 cm in cm2 and then convert this value to m2.
The area of one page of a book is 500 [tex]cm^{2}[/tex] or [tex]5 m^{2}[/tex].
What is Area?Area is the amount of space occupied by a two-dimensional figure. It is the quantity that measures the number of unit squares that cover the surface of a closed figure.
The formula for Area = length x breadth
From the question;
length = 20cm
breadth = 25cm
Area = 20 x 25
Area = 500 [tex]cm^{2}[/tex]
Converting the value in [tex]cm^{2}[/tex] to meters
Area = 500/100
Area = [tex]5 m^{2}[/tex]
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PLEASE HELP
Which is not a characteristic of a reflecting optical telescope?
A) The mirrors inside the telescope do not need to be cleaned often.
B) They are easier and cheaper to create.
C) There is minimal distortion of the image.
D) The mirrors occasionally tend to get foggy.
Learning Goal: To understand the standard formula for a sinusoidal traveling wave One formula for a wave with a y displacement (e.g., of a string) traveling in the x direction is y(x, t) A sin(kx-wt) All the questions in this problem refer to this formula and to the wave it describes. Part A Which of the following are independent variables? O r only O t only O A only O k only w only O and t O w and t O A and k and w Submit Request Answer Part B Which of the following are parameters that determine the characteristics of the wave? only O t only O A only O k only w only and t and t O A and k and w Submit Request Answer PartD What is the wavelength λ of the wave? Express the wavelength in terms of one or more given variables (A, k, r, t, and w) and any needed constants like π. Azo Part E What is the period 1' of this wave? Express the period in terms of one or more given variables (A, k, x, t, and w) and any needed constants like TT A2p Part F What is the speed of propagation of this wave? Express the speed of propagation in terms of one or more given variables (A, k, r, t, and w) and any needed constants like T. A2o
The answer related to the sinusoidal travelling wave is given below:
A. x and t
B. A and k and ω
D. Lambda = 2*pi/k
E. T = 2*pi/omega
F. v = omega/k
What is sinusoidal travelling wave?
The mathematical curve known as a sine wave, also known as a sinusoidal wave or simply a sinusoid, is described in terms of the sine trigonometric function, of which it is the graph. Both a smooth periodic function and a kind of continuous wave, it.
Independent variables can be freely changed to affect the function's value. On a function plot, the independent variables are often plotted on the horizontal axis.
x and t
The properties of a given function are set by parameters, which are constants. The amplitude, frequency, wavelength, and period of a wave are some examples of these.
A and k and ω
Think about the shape of the wave at time t=0. The wave slopes upward at x=0 and crosses the y axis. The upward-sloping y axis is crossed by the wave at the next x position, which is the wavelength (i.e., the length of one complete cycle of oscillation).
The wavelength should be expressed in terms of one or more of the supplied variables (A, k, x, t, and omega) and any necessary constants, such as pi.
lambda = 2*π/k
In terms of one or more of the provided variables (A, k, x, t, and omega) and any necessary constants, such as pi, express the period.
T = 2*π/omega
Given variables (A, k, x, t, and omega) and any necessary constants (such as pi) should be used to express the speed of propagation.
v = omega/k.
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If there is no external force on a moving object, it will
A stop moving.
B.keep moving with constant velocity.
C.gradually slow down until it stops.
D.gradually speed up.
E.maintain the same state of motion.
Answer:
B keep moving with constant velocity
Explanation:
newton's third law of motion
In a hydraulic press the large piston has cross-sectional area 230 cm2 and the small piston has cross-sectional area 5 cm2. If a force of 250 N is applied to the small piston, what is the force (in kN) on the large piston? Give the answer with one decimal an no unit.
The force on the larger piston of cross-sectional area 230 cm² is 11500 N.
What is force?Force can be defined as the product of mass and acceleration.
To calculate the force on the larger piston, we use the formula below.
Formula:
F = fA/a............... Equation 1Where:
F = Force on the larger pistonf = Force applied to the smaller pistonA = Cross-sectional Area of the larger pistona = Cross-sectional Area of the smaller pistonFrom the question,
Given:
A = 230 cm²a = 5 cm²f = 250 NSusbtitute these values into equation 1
F = (250×230)/5F = 11500 NHence, the force on the larger piston is 11500 N.
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If a pendulum from Earth is taken to the moon, will its frequency increase or
decrease? Why?
It will increase because g on the moon is greater than g on Earth.
It will increase because g on the moon is less than g on Earth.
It will decrease because g on the moon is greater than g on Earth.
It will decrease because g on the moon is less than g on Earth.
If a pendulum from Earth is taken to the moon, its frequency decrease, D. It will decrease because g on the moon is less than g on Earth.
Why will the frequency decrease?The moon is significantly lighter than the Earth itself. Not only is the Moon smaller than the Earth, but it is also only about 60% as dense. As a result, the gravitational attraction on the Moon is much lower than on Earth, and a person weighs less on the Moon.
The acceleration due to gravity on the Moon's surface is approximately 1.625 m/s² which is approximately 16.6% of the acceleration due to gravity on Earth's surface, or 0.16. When a simple pendulum is taken from the earth to the moon, its pull decreases, causing the time period to increase. The value of 'g' on the moon is one-sixth that of the Earth's surface.
If a pendulum is taken from the Earth to the moon, the pendulum will have a lower frequency on the surface of the Moon as on the surface of the Earth.
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5. An automobile with a mass of 1000 kilograms accelerates when the traffic light turns green. If the
net force on the car is 4000 Newtons, what is the car's acceleration?
Answer:
Therefore, the acceleration of the car will be 4 (ms2).
g a -4.00 nc point charge is at the origin, and a second -5.50 nc point charge is on the x-axis at x = 0.800 m.
The magnitude and direction of the electric field at x = 0.200 m is 762.5 N/C to the left.
The magnitude and direction of the electric field at x = 1.200 m is 334.375 N/C to the left.
The magnitude and direction of the electric field at x = - 0.200 m is 949.50 N/C to the right.
The formula to calculate the magnitude of the electric field is
E = (kQ) ÷ r²
where
k = a Coulomb's constant = 9 × 10⁹ Nm²/C²Q = the magnitude of point charge (Coulomb)If the point charge has a negative charge, the direction of the electric field goes to the point charge. But if the point charge has a positive charge, the direction of the electric field goes away from the point charge.
The problem is not complete, it should say where is the point. Using a similar problem, for the same question.
For x = 0.200 m
Q₁ at originFor x = 1.200 m
Q₁ at originFor x = - 0.200 m
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You’re an astronaut in the first crew of a new space station. The station is shaped like a wheel 22 m in diameter, with essentially all its 5.0×105 kg mass at the rim. When the crew arrives, it will be set rotating at a rate that requires an object at the rim to have radial acceleration g, thereby simulating Earth’s surface gravity. This will be accomplished using two small rockets, each with 100 N thrust, mounted on
the station’s rim. Determine how long to fire the rockets.
The time taken to fire the rocket at the given thrust is 1,382.3 seconds.
What is the centripetal acceleration of the wheel?The centripetal acceleration of the wheel is calculated by applying the following formula.
F = ma
where;
a is the centripetal acceleration of the wheelm is the mass of the wheelF is the thrust or force of the rocketsa = F / m
a = (100 N) / (5 x 10⁵)
a = 2 x 10⁻⁴ m/s²
The velocity of the wheel is calculated as follows;
a = v²/r
where;
r is the radius of the wheel = 11 mv² = ar
v = √ (ar)
v = √ (2 x 10⁻⁴ x 11 )
v = 0.05 m/s
The time of motion of the motion of the rockets at the given speed is calculated as;
v = 2πr / T
T = 2πr / v
T = (2π x 11) / (0.05)
T = 1,382.3 seconds
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At which latitudes shown in the image of Earth do people experience the greatest tangential speed? Explain why.
Answer:
Below
Explanation:
At 0 ( or between 30 N and 30 S)
they travel the largest circle circumference in a 24 hour day rotation