A wave's frequency and wavelength are connected to the wave's speed by the... The following formula can be used to determine the radio wave's wavelength.
How do you determine a radio wave's speed?Wavelength x Wave Frequency equals speed. In this equation, the units of wavelength and frequency are meters for wavelength and hertz (Hz), or the number of waves per second, for frequency.
How is the wave equation applied?Write out the wave function in the form to determine a sinusoidal wave's amplitude, wavelength, period, and frequency.
How is the energy of sound determined?Your sound will be more strong the more your sound wave oscillates.
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what is the density (in kg/m3) of a woman who floats in freshwater with 4.35% of her volume above the surface? this could be measured by placing her in a tank with marks on the side to measure how much water she displaces when floating and when held under water (briefly).
The density (in kg/m³) of a woman who floats in freshwater with 4.35% of her volume above the surface is 960 kg / m³
If the density of a woman who floats in freshwater with 4.35% of her volume above the surface, the density of the woman is 4.35 % less than the density of fresh water. Let ρw be the density of the woman and ρf be the density of fresh water.
In equation it can be written as
ρw = ρf - 0.04 ρf
ρf = 1000 kg / m³
ρw = 0.96 ρf
ρw = 0.96 * 1000
ρw = 960 kg / m³
Therefore, the density of the woman is 960 kg / m³
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Given a material of specific heat c in Cal/gramC^o and mass 5 grams. If the material is heated from a temperature of 10 C^o to a temperature of 37 C^o then which of these expressions yields the amount of heat added to the material in calories? A)5 times c times (37 - 10) B)5 divided by c times (37 - 10) C)5 times c divided by (37 times 10)
Given:
The specific heat of the material is c Cal/(gram°C)
The mass of the material, m=5 g
The initial temperature of the material, T₁=10 °C
The final temperature of the material, T₂=37 °C
To find:
The expression for the amount of heat added to the material.
Explanation:
The specific heat of a material is the heat required to raise the temperature of the unit mass of the material by one degree celcius.
From the equation of specific heat, the amount of the heat added to a material is given by,
[tex]\begin{gathered} Q=mc\Delta T \\ =mc(T_2-T_1) \end{gathered}[/tex]On substituting the known values,
[tex]Q=5\times c\times(37-10)\text{ calories}[/tex]Final answer:
Thus the correct answer is option A.
A cloud drifted 2,520 meters to the east at a constant velocity. It took the cloud 18 minutes
to drift that far. What was the cloud's velocity?
Answer:
Explanation:
Given:
D = 2 520 m
t = 18 min = 18·60 = 1080 s
____________
V - ?
V = D / t = 2 520 / 1 080 ≈ 2.33 m/s or V = 8.4 km/h
In 45 seconds a car accelerates 10 m/sec? to 110 m/sec. How fast was the car going before it accelerated?
The acceleration of the car is 2.22m/s²
Acceleration is the rate at which an object's velocity with respect to time changes. They are vector quantities, accelerations.
We are given that,
The average speed of the car = V = Vf -Vi = 110m/s - 10m/s = 100m/s
The rate of car to accelerate = t = 45sec
Therefore, the acceleration of the car can be calculated as,
a = (Vf -Vi)/t
a = (100m/s)/45sec
a = 2.22m/s²
Thus ,the acceleration of the car would be 2.22m/s².
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when a compact disk with a 12.0 in diameter is rotating at 34.6 rad/s, what are (a) the linear speed, and (b) the centripetal acceleration of a point on its outer rim?
the linear speed at 12.0 diameter and angular velocity 34.6rad/s is 2.076m/s and centripetal acceleration is 0.718296m/s².
What is linear speed and centripetal force?The term "linear speed" describes the change in distance as a function of time. This shift could happen overnight or gradually. In contrast to average linear speed, which is defined as linear speed seen over a longer time period, instantaneous linear speed is defined as linear speed recorded over a relatively brief period of time. However, it is more accurate to measure the linear speed over a brief period of time.
A net force that keeps an object moving in a circular motion is known as a centripetal force.
Centripetal acceleration, any item moving along a circular path with a radius of rrr and a velocity of vvv experiences an acceleration that is directed toward the path's centre, with the formula a = frac v2 r a= r v 2.
A equals v squared divided by r, where r is the end fraction.
We need talk about how the object started out travelling in a circular motion, though. According to Newton's first law, unless acted upon by an outside force, an object will continue to move in a straight path. The centripetal force is the outside force in this situation.
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Use the symbols to fill in the data table.
The symbol for kinetic, potential, and total energy for going up is ↑, ↓, S and for going down ↓, ↑, S respectively.
P.E = Potential energy
The stored energy in an object by virtue of its position is known as potential energy.
K.E = Kinetic energy
The energy due to moving of an object.
T.E = Total energy
Sum of kinetic and potential energy.
Symbols used are:
↑ increases, ↓ decreases, S stay the same
skater's movement P.E K.E T.E
Down the hill ↑ ↓ S
Up the hill ↓ ↑ S
The symbol for kinetic, potential, and total energy for going up is ↑, ↓, S and for going down ↓, ↑, S respectively.
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How would year result have been different if the energy transferred between the hot objects and cold water were 100% efficient explain your reasoning
The result would have been different with the temperature being constant if the energy transferred between the hot objects and cold water were 100%.
What is Temperature?This is referred to as the degree of hotness or coldness of a substance or body and is influenced by thermal energy and the unit is Kelvin.
The process of heat transfer which is known as conduction is used in this process and some are lost to the environment or surroundings but in a situation where the energy transferred between the hot objects and cold water were 100% then there will be a constant temperature.
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what helps create metamorphic and sedimentary rock
Answer:
!
Explanation:
Sedimentary rocks originate when particles settle out of water/air, or by precipitation of minerals from water. They accumulate in layers. The most important processes that lead to the creation of sedimentary rocks are erosion, weathering, dissolution, precipitation, and lithification.
Metamorphic rocks result when other rocks are changed by heat, pressure, or reactive fluids, such as hot, mineral-laden water, and sometimes a combination of all these factors. These conditions are found deep within the Earth or where tectonic plates meet.
A sedimentary rock is a rock formed through weathered and compacted sediments. These kinds of rocks undergo five major stages: erosion, deposition, weathering, compaction, and cementation. Through the breaking down and combining of scattered sediments, sedimentary rocks are formed.
What is a metamorphic rock?A metamorphic rock is typically thought of as a rock that undergoes intense heat and pressure in the mantle of Earth. This kind of rock can be formed from any kind of process, as long as it goes through a phase of extreme exposures to heat. Metamorphic rocks are common underground. These rocks eventually rise to Earth's surface, and they cool and crystallize to become igneous rocks.
a circular loop of radius rotates with angular frequency in the presence of a unifrom magnetic field of magnitude . what is the maximum induced emf? express in terms of the variables (omega), , (pi), , as needed.
The maximum induced emf on the circular loop is = Bπr²ω.
What is electromotive force?When no current is flowing, electromotive force (EMF) equals the terminal potential difference.
Despite the fact that both EMF and terminal potential difference (V) are expressed in volts, they are not the same thing. EMF is the quantity of energy (E) that the battery supplies to each coulomb of charge (Q) that passes through.
Let, the radius of the circular loop is = r.
Angular frequency of rotation is = ω.
And, magnitude of uniform magnetic field = B.
Then, magnetic flux; Φ = B·A = Bπr² cosωt
So, induced emf : ε = dΦ/dt = Bπr²ω sinωt
Hence, the maximum induced emf is = Bπr²ω.
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a loop of wire is enclosing area 0.04m^2 has a magnetic field passing through its plane at an angle to the plane. the component of the field perpendicular to the plane is 0.12t, and the component parallel to the plane is 0.05t. what is the magnetic flux through this coil?
The magnetic flux through the coil if the component of the field perpendicular to the plane is 0.12t, and the component parallel to the plane is 0.05t is 0.0048 Wb
Φ = B A cos θ
Φ = Magnetic flux
B = Magnetic field
θ = Angle between magnetic field and normal of the surface
A = 0.04 m²
For the component of the field perpendicular to the plane,
B = 0.12 T
θ = 0
Φ = 0.12 * 0.04 * cos 0
Φ = 0.0048 Wb
For the component parallel to the plane,
B = 0.05 T
θ = 90°
Φ = 0.05 * 0.04 * cos 90
Φ = 0
So, to calculate magnetic flux through this coil, the component of the field perpendicular to the plane needs to be used.
Therefore, the magnetic flux through this coil is 0.0048 Wb
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what is the horizontal acceleration of an object undergoing projectile motion?
That is acceleration due to the horizontal component of velocity is 0
When the body is on the projectile we tend to take components on the initial velocity for ease of calculation. The velocity is then divided into its components u sinФ and u cosФ where the horizontal component of the velocity of the projectile is shown by u cosФ while the vertical component of the velocity of the projectile is shown by u sinФ
To calculate the acceleration of either component of the velocity is very easy. In this case, we use the third equation of Newton's Equation of motion.
[tex]V^{2}[/tex]-[tex]U^{2}[/tex]=2as
When we calculate the acceleration of the horizontal component of velocity, we find that since the velocity remains the same at both the endpoint and the start no acceleration takes place.
[tex]U^{2}[/tex][tex]Sin^{2}[/tex]Ф-[tex]U^{2}[/tex][tex]Sin^{2}[/tex]Ф=2as
Thus, 2as=0
That is acceleration due to the horizontal component of velocity being 0
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An object with a mass of 188 kg accelerates 6.09 m/s² when an unknown force is applied to it. What is the magnitude
of the force?
The magnitude of the force is 1144.92 N.
How do you define force?
Physicists define force as:
Push or pull which when applied to an object having mass causes it to change its velocity in response to the push or pull.
It has a magnitude and a direction. The direction of the force is referred to as the force's direction, and the application of force is the place at which the force is applied.Using a spring balance, the Force can be quantified. Newton is the SI-defined unit of force (N).The vector product of mass (m) and acceleration represents the amount of force (a).
Mathematically speaking, the force equation or formula can be written as follows:
F = ma
where m equals mass
a represents acceleration.
It is articulated either in Newton (N) or Kgm/s2.
As per Newtons second law of motion,
F=m×a
Given in the question,
Mass, m=188 kg
Acceleration, a=6.09 m/s2
Therefore,
F=188 x 6.09
F=1144.92 N
Hence, the magnitude of the force is 1144.92 N
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the transfer of energy from one object to another is called
Answer:Conduction
Explanation:the transfer of heat energy occurs between two objects that are touching.
how much power does it take to lift 250 N 40 m high in 2 sec
The amount of power required to lift 250 N over 4 m high in 2 seconds is 5000 W.
What is power?Power can be defined as the ratio of the work done by a body to the time taken to do the work.
To calculate the power, we use the formula below.
Formula:
P = Fd/t................. Equation 1Where:
P represent PowerF represent Forced represent Distancet represent TimeFrom the question,
Given:
F = 250 Nd = 40 mt = 2 secondsSubstitute these values into equation 1
P = (250×40)/2P = 5000 WHence, the amount of power required is 5000 W.
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An electric current can be generated in a wire in a circuit when at least part of the wire ____________.is coated in plastic.is made of aluminum.moves through and cuts magnetic field lines.is not moving.
Answer:
Explanation:
When a coil of wire is moved around a magnet, it induces electrons into the wire and creates electric current. Thus, the correct option is
moves through and cuts magnetic field lines
What substance is the usable source of the energy that a cell uses for the synthesis of materials?.
The usable source of the energy that a cell uses for the synthesis of materials is ATP.
ATP stands for adenosine triphosphate.
The cellular energy standard is ATP.They are energy-carrying molecules that are by-products of photophosphorylation reactions.The primary energy sources for ATP include minerals, carbohydrates, lipids, proteins, etc.When the cell needs energy, ATP can be taken out and used to fuel reactions or stored for use in later ones.
Animals use ATP to store the energy released during food digestion. Similar to this, plants use ATP molecules to store the energy they obtain from light during photosynthesis.
The usable source of the energy that a cell uses for the synthesis of materials is ATP.
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During a game of handball, you strike the ball with a mass of .06 kg, and it accelerates to the left at a rate of 13.7 m/s2. What force did your hand exert on the ball?(1 point)
A.) 0.82 N
B.) 13.64 N
C.)228 N
D.) 13.76 N
The force exerted on the ball of mass 0.0 6 kg and acceleration of 13.7 m/s² is 0.82 N. The correct option is A.) 0.82 N
What is force?Force can be deifned as the product of mass and acceleration.
To calculate the force exerted on the ball by my hand, we use the formula below.
Formula:
F = ma........... Equation 1Where:
F = Force exerted on the ballm = Mass of the balla = Acceleration of the ballFrom the question,
Given:
m = 0.06 kga = 13.7 m/s²Substitute these values into equation 1
F = (0.06×13.7)F = 0.822 NF ≈ 0.82 NHence, the force exerted on the ball by my hand is 0.82 N. The right option is A.) 0.82 N
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Objects with smaller masses have more gravitational energy than objects with larger masses. True or false?
Objects with smaller masses have more gravitational energy than objects with larger masses is false .
Gravitational energy is potential energy stored in an object according its distance from the Earth.
The greater the size of the masses, the greater is the gravitational force
U=m g h
since , gravitational potential energy is directly proportional to the mass
hence , bigger the mass bigger will be the gravitational potential energy and vice versa .
hence , Objects with smaller masses have more gravitational energy than objects with larger masses is false .
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A sprinter had the following speeds at different times during a race: 0 m/s at 0 s, 4 m/s at 2 s, 7 m/s at 4 s, 10 m/s at 6 s, 12 m/s at 8 s, and 10 m/s at 10 s. Plot these data on a speed-time graph. During what time intervals is the acceleration positive? Negative? Is the acceleration ever zero?
Answer:
Explanation:
We build graphs of speed and acceleration.
Acceleration is positive in the interval (0 - 8) s.
Acceleration is negative in the interval (8-10) s.
Electric potential differences are measured in _____.voltsjoulesnewtonscentimeters
The correct unit used to measure the electric potential difference is Volts.
Joules is used to measure energy.
Newtons is used to measure forces.
Centimeters is used to measure distance.
Therefore the correct option is the first one.
The speed of light in a vacuum is 299,792,458 meters per second (m/s). Which number, written in scientific notation, is the best approximation of the speed of light?.
The speed of the vacuum will be 2.99792458, which is equivalent to 3.0
A greater numerical value can be expressed in a very tiny number using scientific notation. This is accomplished by taking the number's single decimal form and raising the other numbers to the power of 10.
The number suiting the best approximation for the speed of light is:3×10⁸
The determination of the base and power are as follows:
The speed of light in a vacuum is 299,792,458 meters per second.
The total number of digits is 9
As per the rules, the power to 10 is always a total number of digits less than 1.
So the power to 10 will be:
Power to 10, so the Total digit is 1
9-1= 8
The speed of the vacuum will be 2.99792458, which is equivalent to 3.0
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Forces are applied along various points on a lever arm as shown below.Calculate the net torqu and describe the direction of rotation from the axis of rotation that would result in a net moment(torque) of zero
The net torque applied on the lever be 180 N-m.
The direction of torque is perpendicular to both force and axis of lever and it acts outwards.
So any force at any point on axis of rotation for which torque is 180 N-m and directed in opposite direction would result in a net moment(torque) of zero.
What is torque?The force that can cause an object to rotate along an axis is measured as torque. Similar to how force accelerates an item in linear kinematics, torque accelerates an object in an angular direction.
A vector quantity is a torque. The force acting on the axis determines the direction of the torque vector.
Mathematically, torque = force × perpendicular distance.
So, net torque applied on the lever :
= + (15N)×(20m) + (5N)×(15m) - (5N)×(5m) -(10N)×(17m)
= 180 N-m.
And the direction of torque is perpendicular to both force and axis and it acts outwards.
So any force at any point on axis of rotation for which torque is 180 N-m and directed in opposite direction would result in a net moment(torque) of zero.
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abunai hana has heard that she can obtain the most distance by shooting a crossbow bolt at a 45 degree angle above the positive x axis. her crossbow can shoot bolts at 30m/s. draw the vector triangle and decompose the vector into its x and y components.
vcos45 and vsin45 are the vector into its x and y components.
Vx=vcos45=15.75 m/s
Vy=vsin45=25.5 m/s
A vector is a quantity in physics that has both magnitude and direction. It is frequently depicted as an arrow with a length proportionate to the magnitude and a direction matching the magnitude of the quantity. While a vector has magnitude and direction, it lacks position. In other words, a vector's length won't change if it is shifted parallel to itself.
Even though a quantity has magnitude and direction, it must meet certain requirements in order to be classified as a vector. One of them is the vector addition formula, represented by the symbols A + B = C.
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Grandma lives 120 miles away. Dinner is at 5 p.m. The speed limit is 60 mph. What time do you need to leave to be on time?
Given data:
* The distance to the Grandma house is d = 120 miles.
* The value of the speed limit is v = 60 mph.
* The time for the dinner is t = 5 p.m.
Solution:
The time taken to reach the Grandma house while moving in the speed limit is,
[tex]\begin{gathered} v=\frac{d}{T} \\ T=\frac{d}{v} \end{gathered}[/tex]Substituting the known values,
[tex]\begin{gathered} T=\frac{120}{60} \\ T=2\text{ hours} \end{gathered}[/tex]The time of leaving is,
[tex]\begin{gathered} t_1=t-T \\ t_1=5-2 \\ t_1=3\text{ p.m.} \end{gathered}[/tex]Thus, the time at which the person should leave for grandma's house is 3 p.m.
which of the following service application valves is sometimes referred to by truck drivers as a trolley valve or spike?
The trailer hand valve works the trailer brakes. The trailer hand valve must be used handiest to check the trailer brakes. Do now no longer use it in riding due to the hazard of creating the trailer skid.
Pop-off valve - A time period on occasion used to explain the protection valve. Primary reservoir - A tank that generally components air to the brakes at the rear axle(s).
The reason of the hand valves is to permit greater or much less inlet steam nozzles for use at some point of operation. Optimizing the steam nozzles used keeps turbine performance at some point of load changes.
A Safety Relief Valve is designed to open and relieve extra stress from vessels or equipment …after which to re-near and save you the similarly launch of fluid, gas, or steam as soon as everyday situations had been restored. There are some of motives why the stress in a vessel or device can exceed a predetermined limit.
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Suppose an experimental arrangement has mass m1= 0.200 kg at the 0.100-m mark and a mass m2= 0.100 kg at the 0.750-m mark. Can the system be put in equilibrium by a 0.050-kg mass? If it can be done, state where it would be placed. If it cannot be done, state why not.
It is to be noted that the system cannot be put in equilibrium by a 0.050kg mass. This is because the point on the stick where it ought to be placed is longer than the actual length of the stick.
What is Equilibrium?In physics, equilibrium is the state of a system where neither its state of momentum nor its internal energy state changes over time. In a meter-stick experiment, the net torque applied to the system must be zero for the system to be in equilibrium.
Assume the center of gravity is at 0.500 m.
Recall that m1 = 0.200kg at 0.100m mark
m2 = 0.100kg at the 0.750m mark
m1(0.500 - 0.100) = m2(0.750 - 0.500) + m3(d-0.500)
0.2(0.4) = 0.1(0.25) + 0.05(d-0.5)
0.055 = 0.05d -0.025
d = 1.6 m
This indicates that the 0.050 kg weight must be placed on the right side, 1.6 m from the center of the scale; however, because the scale is only 0.5 meters long on each side of the center, adding 0.050 to the meterstick is impossible. If we add it anywhere along the 0.5 m length of the stick, the system will not be in equilibrium.
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What is the ME if the m = 25 kg, h = 250 m, and the v= 50 m/s?
The mechanical energy of the given mass is equal to 92500 J.
What is mechanical energy?Mechanical energy can be demonstrated as the sum of kinetic energy and potential energy that is utilized to do work. Mechanical energy is energy because of the motion or position of an object.
The total mechanical energy is conserved because the energy can neither be created nor destroyed. Mechanical energy can be transformed from one form to another form.
The mechanical energy = Kinetic energy + potential energy
Mechanical energy = (1/2)mv² + mgh
Given the mass of the object, m = 25 Kg
The height of the object, h = 250 m
The velocity of the object, v = 50 m/s
Therefore, Mechanical energy = (0.5)× 25 ×(50)² + 25 × 9.8 × 250
M.E. = 31250 + 61250
M.E. = 92500 J
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help would be nice
A
B
C
D
As the projectile moves from Q to R, the magnitude of the vertical velocity increases.
option A is the correct answer.
What is vertical velocity?
The vertical velocity of a projectile is the upward velocity of the projectile.
During the upward motion of a projectile, its vertical velocity decreases as the projectile moves upwards and eventually becomes zero as the projectile reaches the maximum height.
As the projectile begins to move downwards, the vertical velocity begins to increase and eventually becomes maximum before the projectile hits the ground.
Thus, vertical velocity of a projectile increases as the projectile moves downwards.
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15. Calculate Solar Radiation Averaged over a year in the central United States,
radiation from the Sun transfers about 200 W to each square meter of Earth's
surface. If a house is 10 m long by 10 m wide, how much solar energy falls on the
house each second?
Radiation from the Sun transfers about 200 W to each square meter of Earth's surface. If a house is 10 m long by 10 m wide , 20000 Joules of solar energy falls on the house each second .
Solar energy is defined as the transformation of energy that is present in the sun and is one of the renewable energies.
dimensions of the house are
length = 10 m
width = 10 m
area = [tex]side^{2}[/tex] = 10 * 10 = 100 [tex]m^{2}[/tex]
It is given that the Sun transfers about 200 W to each square meter of Earth's surface .
hence , energy transfer to the whole roof will be = 200 * 100 = 20000 Joules
20000 Joules of solar energy falls on the house each second
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A Six Flags students notice that all of the roller coasters use motors to pull the cars to their highest point at the first hill, and then release the cars down the hill and for the rest of the trip. Why must the first hill of a rollercoaster ride be the highest? Answer with a claim, evidence and reasoning.
According to the conservation of energy
[tex]Total\text{ energy = Potential energy +Kinetic energy}[/tex]At the top of the hill, only the potential energy will work as it is at rest.
Also, potential energy increases with height, so if the height of the first hill is the highest, the total energy will be more.