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3 years ago

5

The distance between stars is typically measured in

1 answer:

Murljashka [212]3 years ago

3 0

<span>The question says: complete the sentence: The distance between stars is typically measured in.... The answer is 'light years" - the distance that light travels in a year. That's because it's a very big unit and if we were using smaller units, we would be using huge numbers that would be hard to read and would take up a lot of space.</span>

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Can anyone help me with this question?

yan [13]

Answer: The spring potential energy must equal or exceed the energy to raise the mass to loop height and the minimum kinetic energy needed to keep the mass in contact with the top of the loop

kd² = 5Mrg

h = kd²/2Mg

Explanation:

at top of loop

Mv²/r = Mg

v² = rg

½kd² = ½Mv² + Mgh'

½kd² = ½M(rg) + Mg(2r)

½kd² = 2.5Mrg

kd² = 5Mrg

½kd² = Mgh

h = kd²/2Mg

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3 years ago

Longitudional waves travel through a series of ________ and ___________.

nekit [7.7K]

Answer:

compressions; rarefactions

Explanation:

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3 years ago

3.60×10^23 nitrogen molecules collide with a 16.0 cm^2 wall each second. Assume that the molecules all travel with a speed of 45

Oksi-84 [34.3K]

Answer:

The pressure on the wall is 9416.25 N/m²

Explanation:

Please see the attachments below

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3 years ago

What does the atomic mass of an atom tell us?

icang [17]

Well it would tell us the number of neutrons and protons in the nucleus so i would assume the number of energy levels.

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3 years ago

Read 2 more answers

A box (m = 20 kg) is sliding on a horizontal surface. it is connected to a massless hook by a light string passing over a massle

Varvara68 [4.7K]

mass of the box = 20 kg

force of friction on the box due to surface

$F_s = \mu_s N$

$F_s = 0.80 * 20 * 9.8$

$F_s = 156.8 N$

similarly kinetic friction on it

$F_k = \mu_k N$

$F_k = 0.30* 20 * 9.8$

$F_k = 58.8 N$

now the weight of the suspended block will be

$W = mg = 15*9.8 = 147 N$

so here the weight of the suspended block is less than the limiting friction on it

So here we will say that friction will counter balance the weight of the suspended block and it will not move at all

So acceleration of the box will be zero

5 0

4 years ago