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myrzilka [38]
3 years ago
10

What is the distance an object would be from Earth if its parallax were one arcsecond?

Physics
1 answer:
ZanzabumX [31]3 years ago
8 0
The correct answer is (a.) a parsec. A parsec is a distance an object would be from Earth if its parallax were one arcsecond. This unit of measurement is usually used in astronomy which makes it easier for astronomers to calculate or measure in space accurately. 
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A cubical wooden box floating on water rises 1cm when 400 gm of stone is
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Answer:

Explanation:

I'm not  sure you can do this without just a bit more information. I can tell you what the mass of the water is when the rocks are removed. When we know that, we know the volume of the water that was displaced. whether or not this is enough information to determine the volume of the box, I'm not sure.

400 grams raises the box 1 cm.

The density of water = 1 gm / cm^3

400 grams of water = 400 mL or 400 cm^3

The volume of the displaced water = 400 cm^3

The volume a slice from the square prism is B*h

B = 400 cm^2

h = 1 cm

If the base is 400 cm^2 then each side is

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sqrt(s^2)= sqrt(400)

s = 20

The volume of the box is 20^3 = 8000 cm^3

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3 years ago
A car covers 120 km in 3 hours calculate its speed in m/s​
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Answer:

11.1 m/s

Explanation:

120 km = 120 x 1,000 = 120,000 m

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speed = 120,000 / 10,800

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2 years ago
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