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Tasya [4]
3 years ago
7

What allows us to stand upright and keeps us from falling through the ground?

Physics
2 answers:
S_A_V [24]3 years ago
4 0
Newton's Third Law: Every action has an equal but opposite reaction force. So gravity pulls us down, but the equal reaction force of the earth pushing against you keeps you from falling through the ground.
umka21 [38]3 years ago
3 0
Would it not be matter? We can not fall through solid matter so I would believe this is the answer. (I haven't had physics so i really don't know.) (I probably sound stupid)

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What must be true about a surface in order for diffuse reflection to occur?
balu736 [363]

Answer:

carpet

Explanation:

Diffuse reflection is the reflection of light from a surface such that an incident ray is reflected at many angles rather than at just one angle as in the case of specular reflection.

The structure of carpet's surface is as shown. Thus it shows large amount of diffuse reflection.

4 0
3 years ago
A holiday ornament in the shape of a hollow sphere with mass M = 1.50×10−2 kg and radius R = 5.50×10−2 m is hung from a tree lim
pickupchik [31]

Answer:

T = 0.607 seconds

Explanation:

Given:

Mass, M = 1.50 × 10⁻² kg

Radius, R = 5.50 × 10⁻² m

Now,

the time period in terms of moment of inertia is given as:

T = 2\pi\sqrt\frac{I}{mgR}    .....................1

where, T is the time period

g is the acceleration due to gravity

I is the moment of inertia

Now,

Moment of inertia, I is given as:

I = \frac{5mR^{2}}{3}

on substituting the moment of inertia in the equation 1, we get

T = 2\pi\sqrt\frac{\frac{5mR^{2}}{3}}{mgR}

or

T = 2\pi\sqrt\frac{{5R}}{3g}

on substituting the valeus, we get

T = 2\pi\sqrt\frac{{5\times5.50\times10^{-2}}}{3\times9.8}

or

T = 0.607 seconds

Hence, the time period is 0.607 seconds

5 0
3 years ago
While riding a horse, the horse suddenly comes to an abrupt stop. You fly forward and
natali 33 [55]

Answer:

For every action there is an opposite reaction.

Explanation:

4 0
3 years ago
A scientist wants to learn about Earth's oceans. Which of the following
ahrayia [7]
Hydrosphere - all the waters on the earth’s surface.
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6 0
4 years ago
Read 2 more answers
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