3 years ago

What force keeps our atmosphere from floating out into space?

Physics

2 answers:

ioda3 years ago

5 0

Answer:

gravity

Explanation:

odyssey ware

Tems11 [23]3 years ago

4 0

The answer is C, gravity

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An engine takes in 200 J of heat, expels 40 J of heat, and does 160 J of work. What is the efficiency of the engine?

Reil [10]

The answer would be C. 80%
Put 160 over 200 and find the GCF
160/200÷40=4/5=80%

4 0

3 years ago

find the resultant in the x-direction , Rx and y-direction , Ry for F1 = 2.5n in the positive x-direction f2 = 1n in the negativ

Advocard [28]

The resultant in the x-direction:

Rx = F1 + F2 = 2.5 N - 1 N = 1.5 N .

The resultant in the y-direction:

Ry = F3 + F4 = 2 N - 3 N = -1 N.

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3 years ago

You are pushing a heavy box across a rough floor. when you are initially pushing the box and it is accelerating, (a) you exert a

kodGreya [7K]

The answer is C. If the box is accelerating, that means that the amount of force you are exerting is greater than the force of the box.

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3 years ago

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How tightly does mass need to be compacted in order to become a black hole??? (2 words)

olga55 [171]

is it infinite density?

8 0

3 years ago

A fuse in an electric circuit is a wire that is designed to melt, and thereby open the circuit, if the current exceeds a predete

zmey [24]

Answer:

The diameter of wire should be $4.04 \times 10^{-4}$ m

Explanation:

Given:

Current density $J = 500 \times 10^{4}$ $\frac{A}{m^{2} }$

Current $I = 0.64$ A

From the formula of current density,

$J = \frac{I}{A}$

Where $A =$ area of cylindrical wire = $\pi r^{2}$

$\pi r^{2} = \frac{I}{J}$

$r^{2} = \frac{I}{\pi J }$

$r = \sqrt{\frac{0.64}{3.14 \times 500 \times 10^{4} } }$

$r = 2.02 \times 10^{-4}$ m

For finding the diameter of wire,

$d = 2r$

$d = 4.04 \times 10^{-4}$ m

Therefore, the diameter of wire should be $4.04 \times 10^{-4}$ m

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3 years ago