PHYSICS HIGH SCHOOL

A skier has an acceleration of −2.5 m/s2. How long does it take her to come to a complete stop from a speed of 18 m/s?

Answers

Answer 1
Answer: the answer to your question is 7.2
Answer 2
Answer:

Answer:

7.2 seconds

Explanation:

The formula is a = v/t, or acceleration = the change in velocity over the change in time.

In this case, you do simple algebra to rearrange the formula to solve for time: t = v/a, time = velocity/acceleration.

time = 18 m/s / 2.5 m/s^2 = 7.2s

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What is the best angle for maximum height and air time? explain why you think this is so.

Answers

Answer: 90 degrees

Explanation:

The projectile will have the greatest air time and height when the launch is the most vertical. At 90 degrees, the launch is all vertical.

If it takes 726 W of power to move a mass 36 m and 14 seconds what is the mass

Answers

From that information, I can tell that the force pushing on the mass
averaged (282 and 1/3) newtons during those 24 seconds. 

But the information doesn't nail down what the mass must be.
I think it would if we only knew something about the friction.
Either tell us how much friction there is, or tell us that there's
none, and I think I could find the mass.
power = work / time
work = force * displacement
force = mass * gravity

so:

power = (mass * gravity * displacement) / time
726 = (mass * 9.81 * 36 ) / 14
726 * 14 = mass * 9.81 * 36
10164 = mass * 353.16
mass = 10164 / 353.16

mass = 28.78 kg

What are the divisions within a shell called

Answers

The divisions within an atom's shell are called subshells. This means that each shell consists of several subshells that are made up of orbitals. Each orbital consists of 1 or 2 electrons. The outermost shell of an atom is what we call the valence electrons, and they are what participate in chemical bonding.

Structures that are especially susceptible to wind damage are?

Answers

i know the answer is manufactured homes

The potential of electrons in a circuit can be increased by _____. flowing through the conducting wires
the action of a battery
passing through a circuit element
water pressure

Answers

Answer: The potential of electrons in a circuit can be increased by the action of the battery.

Explanation:

A battery is a source of energy. It provides push to voltage so that the current can flow in the circuit.

For example, the electrical energy is used by the bulb connected in the circuit. The electrical energy is provided by the battery. If the energy of the battery is used up then no current will flow in the circuit. Then the bulb will not glow in this case.

Therefore, the  potential of electrons in a circuit can be increased by the action of the battery.
The potential of electrons in a circuit can be increased by the action of a battery.

♡♡Hope I helped!!! :)♡♡

Which of the following factors does NOT help determine the height, length, and period of a wave?a. wind speed
b. fetch
c. temperature
d. how long the wind blows

Answers

Answer:

Temperature does not determine the height, length and the period of the wave.

Explanation:

Height of the wave shows the amplitude, the length shows the wavelength, and the period of the wave shows the frequency.

The factors that helps to determine the height, length and the period of the wave are :

  • Wind speed : The speed is equal to the product of the wavelength and the frequency of the wave.
  • Fetch : It is defined as the horizontal distance where the wind blows.
  • How long the wind blows : It shows how long the wind blows. It is inversely proportional to the frequency of the wave.

Hence, the correct option is (c) " temperature ".  

Final answer:

The temperature, unlike the wind speed, fetch, and duration of wind blow, does not directly help determine the height, length, and period of a wave.

Explanation:

The height, length, and period of a wave are primarily determined by wind speed, the fetch (the distance over which the wind blows across the water surface), and the duration for which the wind blows. Temperature does not directly determine these characteristics of a wave. Therefore, option 'c' is the correct answer.

While temperature can affect the density and viscosity of the medium, and indirectly impact wave speed, it does not directly influence the height, length, and period of a wave in the same way as the other factors.

The factor that does NOT help determine the height, length, and period of a wave is c. temperature. Temperature does not have a direct influence on the characteristics of a wave. The other factors, such as wind speed, fetch, and how long the wind blows, all play a role in determining the properties of a wave.

Learn more about Wave Characteristics here:

brainly.com/question/31647415

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