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LenaWriter [7]
3 years ago
14

If you press a rubber puller on a rough surface, it does not stick to the surface. why?​

Physics
1 answer:
serious [3.7K]3 years ago
5 0

Answer:

The remaining air between the cup and the rough surface exert pressure on the inner wall of the cup, due to this it does not stick on the rough surface.

Explanation:

HOPE it helps:))))

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Question 10 of 10
Bad White [126]

Answer:

D. The Federal Reserve Bank can provide a short-term loan to banks

to prevent them from running out of money.

Explanation:

A bank run occurs when a large number of depositors withdraw their deposits simultaneously from a bank.

As the number of withdraws increases, the available cash in the bank decreases until a point that the bank can't give depositors their money.

In these situations, The Federal Reserve Bank acts as a lender of last resort that helps to reinforce the effect of deposit insurance, and to reassure bank customers that they will not lose their money.

5 0
4 years ago
How is the process of cooling from a water vapor to ice different to heating ice to water vapor?
garik1379 [7]

In ice the molecules are stuck rigidly together and vibrate in place. In liquid water they slide and bump past one another. In water vapor they are much farther apart and they bounce around freely.

<em>pls mark brainliest</em>

8 0
3 years ago
If you know that the period of a pendulum is 1.87 seconds, what is the length of that pendulum? (assume that we are on earth and
laiz [17]

The length of the pendulum is 0.087 m. Option d is correct.

<h3>What is Simple harmonic motion?</h3>

Simple harmonic motion is periodic motion caused by a restoring force that is proportionate to the deviation from equilibrium.

Simple harmonic motion is periodic motion but many other conditions are dependent.

The time period of the pendulum is found as;

\rm T= 2 \pi \sqrt{\frac{L}{g} } \\\\ \rm 1.87 \ sec= 2 \times 3.14  \sqrt{\frac{L}{9.81 m/s^2} } \\\\ L=0.087 \ m

The length of the pendulum is 0.087 m

Hence, option d is correct.

To learn more about the simple harmonic motion refer to the link;

brainly.com/question/17315536

#SPJ1

4 0
3 years ago
In an experiment different wavelengths of light, all able to eject photoelectrons, shine on a freshly prepared (oxide-free) zinc
topjm [15]

Answer:

the energy of the photons is greater than the work function of the zinc oxide.

                     h f> = Ф

Explanation:

In this experiment on the photoelectric effect, it is explained by the Einstein relation that considers the light beam formed by discrete energy packages.

                    K_max = h f - Ф

in the exercise phase, they indicate that different wavelengths can inject electrons, so the energy of the photons is greater than the work function of the zinc oxide.

                     h f > = Ф

6 0
4 years ago
5. A star begins a s a ball of gas and dust pulled together by
erastova [34]

Answer:

d. Gravity

Explanation:

In the beginning of their lives, stars are formed when clouds of dust and gas are pulled together by gravity.

Hope this helps!!

Please mark as Brainliest

4 0
3 years ago
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