3 years ago

Kelly sits on a rock. Her weight is an action force. What is the reaction force?

1 answer:

4 0

The force ffrom the ground that holds the rock up and prevents her from falling through the gound, unless the ground breaks.

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If a car has a momentum of 1000kgm/s and<br> velocity of 500m/s, what is its mass

Dvinal [7]

Answer:

hey u apply p=mv and 2 are given then calculate thirds value it's a simple do it

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2 years ago

Between 1911 and 1990, the top of the leaning bell tower at Pisa, Italy, moved toward the south at an average rate of 1.2 mm/y.T

Anit [1.1K]

Answer:

Angular speed, $\omega=6.90\times 10^{-13}\ rad/s$

Explanation:

It is given that,

The top of the leaning bell tower at Pisa, Italy, moved toward the south at an average rate of, v = 1.2 mm/yr

$1\ mm/yr=3.171\times 10^{-11}\ m/s$

Velocity, $v=3.80\times 10^{-11}\ m/s$

Height of the tower, h = 55 m

The height of the tower is equivalent to the radius. Let $\omega$ is the angular speed of the tower’s top about its base. The relation between the angular speed and the angular speed is given by :

$v=r\omega$

$\omega=\dfrac{v}{r}$

$\omega=\dfrac{3.80\times 10^{-11}\ m/s}{55\ m}$

$\omega=6.90\times 10^{-13}\ rad/s$

So, the average angular speed of the tower’s top about its base is $6.90\times 10^{-13}\ rad/s$ . Hence, this is the required solution.

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3 years ago

The sun warms equatorial regions of Earth ______ than the poles. This cause an area of ________ pressure to develop near the equ

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Answer:

low

toward

Explanation:

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2 years ago

Convert 25 cm to km using the method of dimensional analysis

pogonyaev

25 x 10^-5
= 0.00025

25 cm
= 0.00025 km

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2 years ago

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4. A gas's solubility is best in a liquid solvent when the solution is under high or low pressure

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low pressure

Explanation:

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2 years ago