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Tomtit [17]
3 years ago
11

The length of a brick is 30cm,breadth 20 cm and volume 9000 cm³.Find the height of the brick.

Physics
1 answer:
kondor19780726 [428]3 years ago
6 0

Answer:

l=30cm

w=20cm

v=9000cm³

h=?

according to formula

h=V/A

h=9000/(30×20)       ∴A=l×w

h=9000/600

h=15cm

mark as brainliest plz

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Answer:

True.

Explanation:

A nanometer is a unit of mass, whereas a nanosecond is a unit of time. To convert 1.3 hours to minute, you would multiply by 1 h / 60 min. Kilometer is a unit of length, whereas kilogram is a unit of mass. True.

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A rope exerts a 280 N force while pulling an 80 Kg skier upward along a hill inclined at 12o. The rope pulls parallel to the hil
user100 [1]

Answer:

The speed of the skier after moving 100 m up the slope are of V= 25.23 m/s.

Explanation:

F= 280 N

m= 80 kg

α= 12º

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g= 9,8 m/s²

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a= (280N - 24.5N) / 80kg

a= 3.19 m/s²

d= a * t² / 2

t=√(2*d/a)

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What happens to molecules when their kinetic energy decreases?
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Answer:

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The magnitude of the electric field can be calculated using the equation

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We know that the charge of the proton is q = 1.6 x 10^{-19}  C

We have to calculate the Force first.

We know that F = ma from Newton's 2nd law, where m is the mass of the proton and a is the acceleration.

We know that the mass of the proton m = (1.67) X 10^{-27}  kg

So it turns out that we have to calculate acceleration before anything else.

In order to calculate the acceleration, we make use of the following data from the question:

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Time taken for the travel between the plates t = (1.48) X 10^{-6}  s

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Rearranging the equation so as to make a the subject of the formula, we have

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Plugging the numbers in and simplifying gets us V_{f}  = (2.22)  *  10^{4}  m/s

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