3 years ago

What force is keeping the Earth in orbit around the Sun? * HELP FAST PLEASE.

Physics

1 answer:

sveta [45]3 years ago

6 0

Answer:

magnetic force due to gravity

Explanation:

nowno that is because that's what the geography teacher taught us back in don't remember but it's true

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Which statement describes the formation of the Milky Way galaxy?

Oliga [24]

Answer:

A disk formed of a long trail of stars coiled into a spiral.

Explanation:

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3 years ago

Falls resulting in hip fractures are a major cause of injury and even death to the elderly. Typically, the hip’s speed at impact

Westkost [7]

Answer:

-5.8868501529 m/s² or -5.8868501529g

0.118909090909 s

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

g = Acceleration due to gravity = 9.81 m/s²

$v^2-u^2=2as\\\Rightarrow a=\dfrac{v^2-u^2}{2s}\\\Rightarrow a=\dfrac{1.3^2-2^2}{2\times 0.02}\\\Rightarrow a=-5.8868501529\ m/s^2$

Dividing by g

$\dfrac{a}{g}=\dfrac{-57.75}{9.81}\\\Rightarrow a=-5.8868501529g$

The acceleration is -5.8868501529 m/s² or -5.8868501529g

$v=u+at\\\Rightarrow t=\dfrac{v-u}{a}\\\Rightarrow t=\dfrac{1.3-2}{-5.8868501529}\\\Rightarrow t=0.118909090909\ s$

The time taken is 0.118909090909 s

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3 years ago

A flat disk, a solid sphere, and a hollow sphere each have the same mass m and radius r. The three objects are arranged so that

Aloiza [94]

Answer:

Explanation:

Rotational inertia of the sphere: $\frac{2}{5}mr^2$

Rotational inertia of hollow sphere: $\frac{2}{3}mr^2$

Rotational inertia of flat disk: $\frac{1}{2}mr^2$

The largest value is 2/3 mr², therefore, hollow sphere's inertia is largest.

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3 years ago

A 0.111 kg hockey puck moving at 55 m/s is caught by a 80 kg goalie at rest. With what speed does the goalie slide on the (frict

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Answer: 0.076 m/s

Explanation:

Momentum is conserved:

m v = (m + M) V

(0.111 kg) (55 m/s) = (0.111 kg + 80. kg) V

V = 0.076 m/s

After catching the puck, the goalie slides at 0.076 m/s.

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3 years ago

Choose all that apply. Which of the following contribute to your body's digestive process?

pav-90 [236]

Chemical reactions and physical processes

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3 years ago

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