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3 years ago

which surface would have the greatest friction? low carpet a gym floor a brand new sidewalk or gravel

Physics

1 answer:

jasenka [17]3 years ago

7 0

Carpet I’m guessing

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The outer shell electrons in metals are not tightly bound to the nuclei of their atoms they are free to roam throughout the mate

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The pumps which supplies energy to move the water from the ground to a high elevation. The charges that flow throughout the wires.

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3 years ago

Uranus is now completing its ____ orbit around the sun since its discovery.

Ket [755]

Answer:

C. Third

Explanation:

it has completed just 2 1/2 orbits since its discovery

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2 years ago

The human ear canal is about 2.9 cm long and can be regarded as a tube open at one end and closed at the eardrum. What is the fu

solniwko [45]

The frequency of the human ear canal is 2.92 kHz.

Explanation:

As the ear canal is like a tube with open at one end, the wavelength of sound passing through this tube will propagate 4 times its length of the tube. So wavelength of the sound wave will be equal to four times the length of the tube. Then the frequency can be easily determined by finding the ratio of velocity of sound to wavelength. As the velocity of sound is given as 339 m/s, then the wavelength of the sound wave propagating through the ear canal is

Wavelength=4*Length of the ear canal

As length of the ear canal is given as 2.9 cm, it should be converted into meter as follows:

$wavelength = 4*2.9*10^{-2} =0.116$

Then the frequency is determined as

f=c/λ=339/0.116=2922 Hz=2.92 kHz.

So, the frequency of the human ear canal is 2.92 kHz.

4 0

3 years ago

A ball is tied to the end of a length of string. A student holds one end of the string and whirls it so the ball travels in a ve

AlexFokin [52]

Answer:

The top of the circle

Explanation:

At the top of the circle, there are two forces pulling the ball towards the center of the circle: weight and tension.

∑F = ma

mg + T = mv²/r

As v goes down, T also goes down, until it eventually reaches 0.

At the bottom of the circle, weight is pulling down, or away from the center of the circle. Sum of the forces:

∑F = ma

T − mg = mv²/r

As v goes down, T also goes down. However, even at v=0, T cannot be less than mg.

5 0

4 years ago

¿Por qué los mensajes llegan en forma inmediata de un celular a otro?

KATRIN_1 [288]

Porque el internet ayuda a la rapidez del mensaje.

7 0

4 years ago

which surface would have the greatest friction? low carpet a gym floor a brand new sidewalk or gravel​

which surface would have the greatest friction? low carpet a gym floor a brand new sidewalk or gravel