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oksano4ka [1.4K]
4 years ago
8

How to do this question

Physics
1 answer:
andre [41]4 years ago
8 0

Answer:

1 m/s^2

Explanation:

V = U + at

20 = 15 + a(5)

5a = 5

acceleration = <u>1 m/s^2</u>

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Answer:

p=m/V

Explanation:

M= Mass

V= Volume

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3 years ago
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Two of the angles in a triangle are complementary. The third angle is twice the measure of one of the complementary angles. What
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Explanation:

Let the 2 be X and Y.

Z is 3rd angle.

Z=2X

w.k.t Sum of angles in a triangle is 180°

Z+X+Y=180°

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2X=90°

=>X=45°

=>Y=90°-45°=45°

=>Z=2X=2(45°)=90°

Hope this helps you.

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3 years ago
A rock formed with 1,000 atoms of a radioactive parent element, but only contains 250 radioactive parent atoms today. If the hal
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Answer:

age of rock is 2 million years

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M_{R}=\frac{M_{O} }{2^{n} }

Where M_{R} is mass remaining

            M_{R} is original mass

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M_{R} =250 atoms

250 =\frac{1000}{2^{n} }

2^{n} = \frac{1000}{250}\\  2^{n} =4\\2^{n}  = 2^{2}\\ n=2

n =\frac{t}{t\frac{1}{2} }

t =t(1/2) *n

t(1/2) =1000000 years

t=1000000 *2

t=2,000,000 years

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When sound waves are reflected back to the source, the reflected sound is called
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It’s an echo :))))))
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An object has a mass of 20kg, what is its weight on Earth?
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The formula is W=mg.

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