in a downhill ski race, surprisingly, little advantage is gained by getting a running start. (this is because the initial kinetic energy is small compared with the gain in gravitational potential energy on even small hills.) to demonstrate this, find the final speed for a skier who skies 68.5 m along a 33.0° slope starting from rest. (neglect any friction.)

Answer:

I am pretty sure it is B My friend hope you are well

Explanation:

Answer:

B- It is a constant when the light is traveling in a vacuum.

Explanation:

"Light in a vacuum always travels at the same speed." Those additional three words in a vacuum are very important. A vacuum is a region with no matter in it. So a vacuum would not contain any dust particles (unlike a vacuum cleaner, which is generally full of dust particles)

Given that the number of hailstones is n = 562

The mass of hailstone is m = 2 g = 0.002 kg

The speed of hailstone is v = 5.8 m/s

The time taken will be t = 92 s

The angle is

We have to calculate the force.

The force can be calculated by the formula

Substituting the values, the force will be

Answer:

I think this is correct

Explanation:

frequency definition is the number of complete waves produced per second so if you have 100Hz, it is 100 complete waves produced in 1 seconds, and when it says vibrates 300 times in 3 seconds, you find for 1 second

vibrations is most probably the frequency in one second

1 second -----100 vibrations

thus the frequency = 100 Hz

hope this helps!!!!!!

TRUE. This description matches that of fibre optic cables, which use a protected string of glass or plastic to transmit beams of light over long distances at high speeds.

The light signals are converted into electrical signals at either end of the cable for communication purposes.

True. A high-speed transmission medium that uses a protected string of glass to transmit beams of light is known as fibre-optic cable. This type of cable can carry data at very high speeds over long distances, providing better performance and reliability than traditional copper cables.

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Answer:steel plate

Explanation: bc I said so

Answer: its B I jus took it

Explanation:

Answer:

C

Explanation:

The statement "They have a positive charge and are present in the nucleus of an atom along with the neutrons" correctly describes protons.

Protons are small particles that make up the nucleus of an atom. They carry a positive charge and have a mass of approximately 1 atomic mass unit. The number of protons within an atom's nucleus defines its atomic number and thus its identity as an element.

For instance, carbon atoms have 6 protons, and oxygen atoms have 8 protons. Protons are vital building blocks of all atoms and play a significant role in the chemical behavior and reactions of elements.

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Answer:

the answer is c

Explanation:

Answer: The car slows down by 10 meters per second every second.

Explanation:

AnswerThe speed of a car is decreased uniformly from 30. meters per second to 10. meters per second in 4.0 seconds. What was the car's acceleration ?

We have the following data:

V (final velocity) = 10 m/s

Vo (initial velocity) = 30 m/s

ΔV  (speed interval)  = V - Vo → ΔV  = 10 - 30 → ΔV  = - 20 m/s

ΔT (time interval) = 4.0 seconds

a (average acceleration) = ? (in m/s²)

Explanation:

1. it is true that the proton-proton chain is the main process that the Sun uses to generate energy.

2. The Sun emits the energy it does because of nuclear fusion reactions.

The primary source of energy in the Sun is nuclear fusion. The Sun's core is a hot and dense region where extreme temperatures and pressures exist. Under these conditions, hydrogen nuclei (protons) collide and fuse together to form helium nuclei. This process is known as nuclear fusion.

The specific fusion reaction that occurs in the Sun is called the proton-proton chain reaction. It involves a series of steps:

The overall result of these fusion reactions is the conversion of four hydrogen nuclei into one helium nucleus, releasing a tremendous amount of energy in the process.

Therefore,

1. it is true that the proton-proton chain is the main process that the Sun uses to generate energy.

2. The Sun emits the energy it does because of nuclear fusion reactions.

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Answer:

c. a and c

Explanation:

ammeters are connected in series to measure charge/current

Answer:

We multiply \(x = 23.78\times 10^{-6}\,\frac{m^{3}}{mol}\) by the amount of mole to change units to cubic meters.

Explanation:

Let \(x = 23.78\times 10^{-6}\,\frac{m^{3}}{mol}\), we change the unit to cubic meters by multiplying this number by the amount of moles of the sample. For instance, let \(n = 1\,mol\), then the obtain the following result:

\(m = x\cdot n\) (1)

\(m = \left(23.78\times 10^{-6}\,\frac{m^{3}}{mol} \right)\cdot (1\,mol)\)

\(m = 23.78\times 10^{-6}\,m^{3}\)

Answer:

Sustainable energy is essential to meet uncontrolled rising demand for energy, reduce pollution and shift to resources that can be used again and again.

Explanation:

Considering the Sustainable Goals floated by United Nation, it is essential for all countries to improve their score in all the SD goals.

One of the SD goal is to shift to sustainable energy.

Sustainable energy is essential from following three points

- Reuse of energy source again and again to outcome the fear of resource depletion

- Sustainable energy source shall ensure cleaner environment

- Sustainable energy sources are also essential to meet the rising consumption of energy with time all across the globe.

Some common examples are - Solar energy, Wind Energy, Energy from nuclear fuels etc.

Conversion of electromagnetic (EM) energy from the sun into other forms of energy occurs for the following options:

a. Biofuels

c. Solar thermal power

e. Wind power (EM to air movements)

A- Biofuels: During photosynthesis, plants capture electromagnetic energy from the sun and convert it into chemical energy, stored in the bonds of organic molecules, such as glucose. This process allows for the conversion of EM energy to chemical energy in the form of biofuels.

c. Solar thermal power: Solar thermal power plants use mirrors or lenses to concentrate sunlight, which is then converted into heat energy. This thermal energy can be used to generate steam, which drives a turbine and produces mechanical energy.

e. Wind power: Wind turbines harness the kinetic energy of moving air, which is ultimately driven by the sun's uneven heating of the Earth's surface. The sun's energy heats the atmosphere, creating temperature and pressure gradients that result in wind currents.

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Answer:

Magnetization is the density of magnetic dipole moments that are induced in a magnetic material when it is placed near a magnet. ... Magnetization is also known as magnet polarization.

Answer:

Violation of intellectual property rights

Explanation:

Im sorry I am late but for the future people its A! :)) Have a great day :)

Answer:

Speed of the body​ = 5.1652 m/s

Explanation:

Given:

Mass M = 17 kg

Length of string = 3.4 m

Tension in the string = 300N

Find:

Speed of the body​

Computation:

T - mg = mv² / R...              [R = L]

So,

T - mg = mv² / L

300 - 17[9.8] = [17][v]² / [3.4]

133.4 = [17][v]² / [3.4]

v² = 26.68

Speed of the body​ = 5.1652 m/s

To calculate the potential difference needed to accelerate an electron to a de Broglie wavelength, use the de Broglie wavelength formula and Planck's constant. Determine the electron's velocity using the de Broglie wavelength, and calculate the potential difference using the kinetic energy formula.

To calculate the potential difference required to accelerate an electron to a given de Broglie wavelength, we can use the de Broglie wavelength formula:

λ = h / (mv)

where λ is the de Broglie wavelength, h is Planck's constant (6.63 x 10^-34 J·s), m is the mass of the electron (9.11 x 10^-31 kg), and v is the velocity of the electron.

First, we need to find the velocity of the electron using the de Broglie wavelength given (1.00 x 10^10 m):

λ = h / (mv)

Rearranging the formula, we have:

v = h / (mλ)

Plugging in the values:

v = (6.63 x 10^-34 J·s) / ((9.11 x 10^-31 kg)(1.00 x 10^10 m))

Calculating this expression gives us the velocity of the electron.

Now, to find the potential difference, we can use the formula for kinetic energy:

K.E. = (1/2)mv^2

Since the kinetic energy is equal to the potential energy (K.E. = eV, where e is the charge of the electron and V is the potential difference), we can set them equal to each other:

eV = (1/2)mv^2

Rearranging the formula, we get:

V = (1/2)(mv^2) / e

Plugging in the values for mass (m) and velocity (v), and knowing that the charge of an electron (e) is 1.6 x 10^-19 C, we can calculate the potential difference (V).

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Answer:

F = 32.2 m

Explanation:

F = ma

F = m * 32.2

The ball is in the air for 0.05 seconds after it leaves the launcher. By analyzing the impulse experienced by the ball, we can determine the final velocity of the ball

To determine the time the ball is in the air after it leaves the launcher, we can use the concept of impulse. Impulse is defined as the product of force and time, and it is equal to the change in momentum of an object.

Impulse (J) = Force (F) * Time (Δt)

We know that the net force acting on the ball is 60 N and the time it is applied is 0.05 seconds. The mass of the ball is 0.3 kg.

The impulse can also be expressed as the change in momentum (Δp) of the ball:

Δp = m * Δv

Where:

m is the mass of the ball,

Δv is the change in velocity.

Since the ball starts from rest, the change in velocity (Δv) is the final velocity (v) of the ball after it leaves the launcher.

By rearranging the equation for impulse, we can solve for the final velocity:

Δv = J / m = F * Δt / m

= 60 N * 0.05 s / 0.3 kg

Simplifying the calculation:

Δv = 10 m/s

Now, to find the time the ball is in the air after it leaves the launcher, we divide the displacement of the ball by the final velocity.

The displacement of the ball is given by:

Δs = v * t

Since the initial velocity is 0 m/s and the final velocity is 10 m/s, the displacement is:

Δs = 10 m/s * t

We want to find the time (t) when the displacement is zero, as the ball reaches the highest point in its trajectory. Therefore, we set Δs = 0 and solve for t:

10 m/s * t = 0

This implies that the ball is in the air for 0.05 seconds after it leaves the launcher.

The ball remains in the air for 0.05 seconds after it leaves the launcher. By analyzing the impulse experienced by the ball, we can determine the final velocity of the ball and use it to find the time it takes for the ball to reach its maximum height. This calculation helps us understand the motion of objects under the influence of external forces and provides insights into projectile motion.

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Answer:

I'm From Philippines

I hope we can be friends.

Answer:

no

Explanation:

because There are three only ways to do it: friction, conduction and induction.

The internal resistance of a 12 V e.m.f cell is 5 10 2, and it is connected via an unknown resistance. When the circuit is closed, the terminal voltage difference is 2.2 V, such as R=5, the voltage differential drops to 1.8 V.

The difference in potential between a cell's two electrodes in a closed loop is known as the terminal voltage differential of a cell. When current is pulled from a cell, the value of the terminal potential difference is lower than the cell's emf.

The term "terminal potential difference" refers to the difference in potential between two electrodes in a closed circuit, or while current is being pulled from the cell.

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Larry Page, real name Lawrence Edward Page, is a computer scientist and entrepreneur from the United States who co-founded Goo-gle, one of the most well-known websites on the Internet, with Sergey Brin on March 26, 1973 in East Lansing, Michigan.

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Speed, good luck. need to be 20 characters