In the photoelectric effect, a beam of light impinges on a metal, and it is observed that electrons are ejected from the metal in greater numbers as the?

Answer:

False, if its not moving there is no potential energy.

Answer:

The ball is at its max Potential energy because if it falls and hits the ground it will be at its max kinetic energy so since sitting high up it is equal to max potential energy. PE=784 J Trust ME that guy is wrong.

Explanation:

Answer:

Mass Kinetic Energy and Jules

Explanation:

The train in question is  big and heavy and a car is decently heavy but say a train moving at 55 mph can plow through a car and a car driving at 55mph driving at a train will be stopped dead in its tracks. This is because newtons laws of motion specifically an object in motion will stay in motion unless its opposed. The train also has a payload behind it meaning it hurts with force while a car doesn't have to much mass behind it. The train takes loner to stop for as it's acceleration as well as it's deceleration are very slow because its huge and takes a lot of force to stop it while a car is very centralized and compact when it comes to weight and its brakes are usually effective at stopping at 55 mph in about 2 to 6 seconds while a train might stay moving for a good 35 seconds. The force behind the train is immense for as even if the wheels don't spin at all the train will still move since the force behind it is great and a cars tires have a lot of grip and not a lot mass which plays into the force the car has so it can stop simply.

Natural gas was the largest source about 38% of U.S. electricity generation in 2021. Natural gas is used in steam turbines and gas turbines to generate electricity.

A) The equations relating v, H, D, t are H = 1/2 g t² and v = D/t.

B) The equation expresses D in terms of v, H, fundamental constants, and not time is D = v √(2H/g).

Velocity of the object is represented as v.

Initial height is H

Horizontal distance travelled is D.

Time of the object in a projectile is t.

A) From the equations of kinematics, we can write,

H = 1/2 g t²

v = D/t

where,

g is acceleration due to gravity

B) From the two equations above, we have,

t = D/v ---(1)

H = 1/2 g t² ---(2)

Putting (1) in (2),

H = 1/2 g t² = 1/2 g (D/v)²

D = v √(2H/g)

Thus, the required equations are explained.

To know more about equations:

https://brainly.com/question/13750407

#SPJ4

A satellite travels at a constant speed, its shape is a circle.

An integrated receiver and transmitter of radio signals known as a transponder, a satellite is essentially a self-contained communications system that can receive signals from Earth and retransmit those signals back to Earth.

The three primary parts of a satellite are the propulsion system, which includes the rockets that move the satellite, the power system, which includes the solar panels that supply power, and the communications system, which includes the antennae and transponders that receive and retransmit signals. To enter into the proper orbit and periodically adjust its position, a satellite needs a propulsion system of its own.

To learn more about satellites, visit the link below:

brainly.com/question/14233179

#SPJ4

To calculate the jumper's speed at this instant, we need to know the tension in the cords, the mass of the jumper, the acceleration at this instant, the initial velocity (which we can assume to be zero), and the time elapsed. Once we have these values, we can plug them into the equation v=u+at to calculate the speed of the jumper.

Assuming we are talking about a jumper who is attached to cords and is currently being pulled upwards, the speed of the jumper at the instant when the tension in the cords is greatest can be calculated using basic physics equations. When the tension in the cords is greatest, it means that the force acting on the jumper is at its maximum. We can use the equation F=ma (force equals mass times acceleration) to calculate the acceleration of the jumper at this instant.
Once we have the acceleration, we can use the equation v=u+at (final velocity equals initial velocity plus acceleration times time) to calculate the speed of the jumper. We will need to know the initial velocity of the jumper, which we can assume is zero if they were stationary before being pulled up by the cords. We will also need to know the time elapsed from the instant when the tension in the cords was greatest.
Therefore, to calculate the jumper's speed at this instant, we need to know the tension in the cords, the mass of the jumper, the acceleration at this instant, the initial velocity (which we can assume to be zero), and the time elapsed. Once we have these values, we can plug them into the equation v=u+at to calculate the speed of the jumper.

for more such question on initial velocity

https://brainly.com/question/29110645

#SPJ11

The angular displacement of the tires in revolutions is approximately 216,867.47 revolutions.

First, let's convert the diameter of the tires from centimeters to meters:

d = 66 cm = 0.66 m

Next, let's convert the speed from km/h to m/s:

v = 300 km/h = (300/3.6) m/s = 83.33 m/s

The circumference of the tire is:

C = πd = π(0.66 m) = 2.075 m

The distance traveled by the car in 1.5 hours is:

d = vt = (83.33 m/s)(1.5 hours)(3600 s/hour) = 450,000 m

The number of revolutions of the tire is equal to the distance traveled divided by the circumference of the tire:

n = d/C = 450,000 m / 2.075 m = 216,867.47

To know more about angular speed, here

brainly.com/question/1425534

#SPJ4

The centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8). Formulae used to find the centre of mass are as follows:x bar = (1/M)*∫∫∫x*dV, where M is the total mass of the system y bar = (1/M)*∫∫∫y*dVwhere M is the total mass of the system z bar = (1/M)*∫∫∫z*dV, where M is the total mass of the systemThe region bounded by y=9-x^2 and y=5/2x, and the z-axis is shown in the attached figure.

The two curves intersect at (-3, 15/2) and (3, 15/2). Thus, the total mass of the region is given by M = ∫∫ρ*dA, where ρ = density. We can assume ρ = 1 since no density is given.M = ∫[5/2x, 9-x^2]∫[0, x^2+5/2x]dAy bar = (1/M)*∫∫∫y*dVTherefore,y bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]y*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]ydA...[1].

The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore,y bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]y*dxdy...[2].

The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.Substituting the values and evaluating the integral, we get y bar = (1/M)*[(9-5/2)^2/2 - (9-(15/2))^2/2]= (1/M)*(25/2)...[3].

Also, the x coordinate of the center of mass is given by,x bar = (1/M)*∫∫∫x*dVTherefore,x bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]x*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]xdA...[4].

The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore, x bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]xy*dxdy...[5].

The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.

Substituting the values and evaluating the integral, we get x bar = (1/M)*[63/8]= (1/M)*(63/8)...[6]Thus, the centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8).

Learn more about centre of mass here ;

https://brainly.com/question/30389896

#SPJ11

Answer:

m = 3.8 kg

Explanation:

p = m × v

95 = m × 25

25m = 95

m = 95/25

m = 3.8 kg

To prove that rock layers in one area match rock layers found in another area, geologists use the principles of stratigraphy, including fossil, lithologic, and chemical correlation techniques.

One way to prove that rock layers in one area match rock layers found in another area is by using the principle of stratigraphy, which is the study of rock layers (strata) and their relationships. Geologists can use several techniques to correlate rock layers between different locations, including:

Fossil correlation: If a particular fossil is found in two different rock layers at different locations, it is a good indicator that the layers are of the same age. This is because certain fossils only existed during specific time periods, and so if the same fossil is found in two different rock layers, it can be inferred that those layers were deposited during the same time period.

Lithologic correlation: Rocks can have unique characteristics that allow geologists to match them to other rocks of the same type. For example, sandstone can have unique grain sizes or shapes that can help identify it as coming from a specific location.

Chemical correlation: Some rocks have unique chemical compositions that can be used to match them to other rocks of the same type. For example, volcanic rocks can have unique isotopic signatures that can help identify them as coming from a specific volcano.

Learn more about stratigraphy here:

https://brainly.com/question/6317848

#SPJ1

Answer:

closed

Explanation:

sorry if I'm wrong

The individual effect of salinity reduced organism performance in 43% of the observations, including decreased survival and growth, increased osmolyte content in bodily fluids, altered metabolic rates, etc.

To learn more about aquatic ecosystem with a different salinity refer to:

https://brainly.com/question/1563358

#SPJ1

Answer:

The answer is "folding".

Explanation:

It is a physical reconfiguring of the process, which gives a fabric a softer, lightweight shape. It is achieved in a far less simple space to carry or store products.  

If an object has a balanced force on it, there is a possibility that the object may be in a position i.e. there is no change in speed and direction of the body.

If the forces acting on an object is balanced, it means that the net force acting on the body is zero.

According to Newton's law of motion, an object will continue in a state of motion in a straight line unless acted upon by an external force.

This external force might be a balanced or unbalanced force. Hence if an object has a balanced force on it, there is a possibility that the object may be in a position i.e. there is no change in speed and direction of the body.

Learn more here: https://brainly.com/question/20835245

Answer:

Synthesis reactions are chemical reactions where two elements combine to make a product. Decomposition reactions are chemical reactions where a reactant produces another product, usually two, or even more. This is when the bonds in the compound are broken apart to make new compounds.

Explanation:

Answer:

Initial momentum: \(0\; {\rm kg \cdot m \cdot s^{-1}}\).

Final momentum: \(150\; {\rm kg \cdot m\cdot s^{-1}}\).

Force on the mass (assuming that the force is constant): \(75\; {\rm N}\).

Impulse on the mass: \(150\; {\rm kg \cdot m \cdot s^{-1}}\).

Explanation:

The momentum \(p\) of an object is equal to the product of mass \(m\) and velocity (a vector) \(v\).

The initial momentum of this mass was \(0\; {\rm kg \cdot m \cdot s^{-1}}\) since the velocity of this object was initially \(0\; {\rm m\cdot s^{-1}}\).

At \(v = 3\; {\rm m\cdot s^{-1}}\), the momentum of this mass (\(m = 50\; {\rm kg}\)) would be:

\(\begin{aligned}p &= m\, v \\ &= 50\; {\rm kg} \times 3\; {\rm m\cdot s^{-1}} \\ &= 150\; {\rm kg \cdot m \cdot s^{-1}}\end{aligned}\).

Assume that the external force \(F\) on this mass is constant. By Newton's Second Law of motion, the external force on this mass would be equal to the rate of change in the momentum of this mass.

Since the momentum of this mass increased by \(\Delta v = 150\; {\rm kg \cdot m \cdot s^{-1}}\) in \(\Delta t = 2\; {\rm s}\), the external force on this mass would be:

\(\begin{aligned}F &= \frac{\Delta v}{\Delta t} \\ &= \frac{150\; {\rm kg \cdot m \cdot s^{-1}}}{2\; {\rm s}} \\ &= 75\; {\rm kg \cdot m \cdot s^{-2}} \\ &= 75\; {\rm N}\end{aligned}\).

The impulse of an external force on an object is equal to the change in the momentum of that object. Since the change in momentum of this mass was \(\Delta v = 150\; {\rm kg \cdot m \cdot s^{-1}}\), the corresponding impulse would also be \(150\; {\rm kg \cdot m\cdot s^{-1}}\):

\(\begin{aligned}J &= \Delta v \\ &= 150\; {\rm kg \cdot m\cdot s^{-1}} \\ &= 150\; {\rm N \cdot s}\end{aligned}\).

Answer:

89.5 Hz

Explanation:

The relationship between the frequency and the wavelength is given by the following formula:

\(\lambda = \frac{c}{f}\\\\\)

where,

f = frequency

c = speed of light

λ = wavelength

Since the speed of light is constant. Therefore the formula suggests an inverse relationship between the frequency and the wavelength. Hence, the station with the lowest frequency will have the longest wavelength.

Therefore, the answer is:

89.5 Hz

Answer:

D) Kira will have more endurance because she spends more time moving heavy objects.

Explanation:

Because Kira works in a warehouse, she most likely spends a significant amount of time lifting and carrying heavy items every day she works. By doing this, Kira builds up muscle endurance, which makes lifting heavy items easier over longer periods for her, versus Marta, who only does it occasionally, and may struggle lifting heavy objects over a consistent amount of time.

Kira is pretty strong. She works in a warehouse, so she moves a lot of heavy things. Her sister Marta can lift more weight than Kira can but only does it occasionally, likely to have more endurance is D. Kira will have more endurance because she spends more time moving heavy objects is correct option.

A warehouse is a large commercial building used for the storage of goods, materials, merchandise, and products. Warehouses are typically equipped with various storage systems, such as racks, shelves, and bins, to organize and store items efficiently. They serve as distribution centers for businesses, where goods are received, sorted, stored, and eventually shipped out to retailers or directly to customers. Warehouses are crucial components of supply chain management, providing a space to hold inventory and manage the flow of products throughout the distribution process.

To know more about pretty strong

https://brainly.com/question/25583626

#SPJ3

Answer:

As there are two objects applying forces to each other they must be equal and opposite.

Thus the force on your foot will be precisely 26.3N in a direction  

180

∘

to the direction of travel of the ball.

Explanation:

The magnitude of the induced current in the coil is 2.5298 A.

The induced current in the coil can be calculated using Faraday's law of electromagnetic induction,

It states that the magnitude of the induced electromotive force (EMF) is proportional to the rate of change of magnetic flux through a surface enclosed by a conductor.

The formula for the induced EMF is given by:

EMF = -N dΦ/dt

where N is the number of turns in the coil, Φ is the magnetic flux through the coil, and dΦ/dt is the rate of change of magnetic flux.

The negative sign indicates that the induced EMF opposes the change in magnetic flux.

The magnetic flux through the coil can be calculated using the formula:

Φ = BA

where B is the magnetic field strength, and A is the area of the surface enclosed by the coil.

Since the coil is circular, the area can be calculated as \(A = \pi r^2\), where r is the radius of the coil.

Using these equations, we can calculate the induced EMF and the induced current as follows:

Area of the coil, \(A = \pi r^2 = \pi (0.33 m)^2 = 0.345 m^2\)

Initial magnetic flux, \(\Phi $_1 = BA_1 = (2.90 T)(0.345 m^2) = 1.00065 Wb\)

Final magnetic flux, \(\Phi $_2 = BA_2 = (0.150 T)(0.345 m^2) = 0.05175 Wb\)

Rate of change of magnetic flux, dΦ/dt = \((\Phi $_2 - \Phi $_1)/t\)= (-0.9489 Wb)/2.30 s = -0.41296 W/s

Induced EMF, EMF = -N dΦ/dt = -(46)(-0.41296 W/s) = 18.9736 V

Induced current, I = EMF/R = 18.9736 V/7.50 Ω = 2.5298 A

Therefore, the magnitude of the induced current in the coil is 2.5298 A.

Learn more about induced current in the coil.

https://brainly.com/question/9657184?referrer=searchResults

#SPJ11

Signals generated by transducers are normally of the order of microvolts to millivolts.

What are transducers?

Transducers are electrical components that transform energy from one form into another. They are electrical sensors that generate an electrical signal based on the quantity being assessed.

A transducer is a device that transforms a physical quantity such as force, pressure, or temperature into an electrical signal. This electrical signal can then be amplified, filtered, or measured in other ways.

Some common examples of transducers include microphones, strain gauges, accelerometers, and thermocouples.

What are the signals generated by transducers?

The signals generated by transducers are normally of the order of microvolts to millivolts. The magnitude of the signal generated depends on the quantity being assessed, as well as the type and sensitivity of the transducer.

In order to use the signal generated by a transducer, it is usually necessary to amplify and filter the signal to remove noise and unwanted frequencies. This can be done using an amplifier or other signal processing equipment.

Overall, the signals generated by transducers are a crucial part of many electronic systems and are used in a wide variety of applications.

To learn more about transducers from the given link.

https://brainly.com/question/21510006

#SPJ11

Answer:

Burning fossil fuels contributes to climate change.

Fossil fuels are nonrenewable.

Explanation:

Fossil fuels are fuels formed from the remains of dead organic matters that have long been buried under the ground while hydrogen fuel cells are formed from electrochemical reactions.

Fossil fuel burning creates pollution in the environment and some of the pollutants generated contribute to global warming and associated climate change. This is as opposed to fuel cells that generate power through electrochemical reactions and whose products can be converted for other uses.

Also, fossil fuel deposits are finite and non-renewable. Once their deposits become exhausted, there is no way to artificially regenerate them unlike fuel cells.

Answer:

i hope this helps

Explanation:

It would take at least a few generations of stars to create the necessary elements and conditions for a solar system like ours to form.

The possibility of a solar system like ours forming with the first generation of stars after the Big Bang is quite unlikely. The first generation of stars, also known as Population III stars, were formed primarily from hydrogen and helium, the elements created during the Big Bang. These stars were massive and short-lived, going through their life cycles quickly and ending in supernova explosions.

Our solar system, on the other hand, contains a variety of elements heavier than hydrogen and helium, including metals and other elements necessary for the formation of rocky planets like Earth. These heavier elements, known as metals in astronomical terms, were created in the cores of previous generations of stars and dispersed into the interstellar medium through supernova explosions.

Thus, it would take at least a few generations of stars to create the necessary elements and conditions for a solar system like ours to form. This process includes the formation of stars, the creation of heavier elements within those stars, and the dispersal of those elements into the surrounding environment, which eventually leads to the formation of new stars and solar systems with a richer mix of elements.

Learn more about "Big Bang":

https://brainly.com/question/31514134

#SPJ11

ETo determine the acceleration of the crate, we need to resolve the applied force into its horizontal and vertical components. The horizontal component of the force will contribute to the acceleration, while the vertical component will not affect the motion of the crate on a frictionless surface.
Given:
Mass of the crate (m) = 40 kg
Magnitude of the applied force (F) = 140 N
Angle of the force with the horizontal (θ) = 30°

To find the horizontal component of the force (F_horizontal), we can use trigonometry:
F_horizontal = F * cos(θ)
F_horizontal = 140 N * cos(30°)
F_horizontal = 140 N * √3/2
F_horizontal = 140 N * 0.866
F_horizontal ≈ 121.24 N
Since there is no friction or vertical forces acting on the crate, the horizontal component of the applied force will be responsible for the acceleration.
Using Newton's second law of motion, which states that the force applied to an object is equal to the mass of the object multiplied by its acceleration (F = m * a), we can calculate the acceleration (a).
a = F_horizontal / m
a = 121.24 N / 40 kg
a ≈ 3.03 m/s²
Therefore, the acceleration of the crate is approximately 3.03 m/s².

To learn more about, Acceleration, click here, https://brainly.com/question/30827337

Answer: The position of the spring as a function of time is given by: x(t) = 6 * sin(π/4 * t)

where t is the time in seconds and x(t) is the position of the spring in meters.

Explanation:

The position of a spring as a function of time can be described by a sinusoidal function. The general form of such a function is:

x(t) = A * sin(ωt + φ) + x₀

where:

x(t) is the position of the spring at time t

A is the amplitude of the motion (maximum displacement)

ω is the angular frequency (related to the period T by ω = 2π/T)

φ is the phase angle (determines the starting point of the motion)

x₀ is the equilibrium position of the spring (where it would be at rest)

In this case, we know that the maximum displacement (amplitude) of the spring is 6m and the period T is 8s. Therefore, we can calculate the angular frequency ω as follows:

ω = 2π/T

ω = 2π/8

ω = π/4

We also know that the spring is at its equilibrium position when t = 0 (i.e., x(0) = x₀). Therefore, we can set x₀ to 0.

Finally, we need to determine the phase angle φ. This can be a bit tricky without more information, as there are many possible starting points for the motion that would produce a sinusoidal function with the given amplitude and period. For simplicity, we will assume that the spring is at its maximum displacement (positive direction) when t = 0. This means that the phase angle φ is 0.

Putting all of this together, we get:

x(t) = 6 * sin(π/4 * t)

This is the position of the spring as a function of time. It describes a sinusoidal motion with an amplitude of 6m and a period of 8s. The motion starts at the maximum displacement (positive direction) and oscillates back and forth around the equilibrium position (0).

A Normal Force is a force applied in the direction perpendicular to the surface that the force is applied to. An example of this is putting pressure directly down on a table with your hand.

A Tension Force is a force applied in the opposite direction of the object the force is applied to. Tension Forces usually are applied by springs, ropes, and wires. An example of this is a wrecking ball hanging from a crane. There is a Tension Force on the wrecking ball holding it up in the air.

These forces are different from one another based on their directions that the forces are applied. Forces are vectors, so their magnitude is determined by the amount of force applied and their direction. Tension Force can be a Normal Force, but Normal Forces are not always Tension Forces.

Answer:

a little to late

Explanation:

srry