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trasher [3.6K]
3 years ago
11

Determine the amount of time for polonium-210 to decay to one fourth its original quantity. The half-life of polonium-210 is 138

days. Explain.
Physics
1 answer:
Tju [1.3M]3 years ago
5 0

Answer:

276 days

Explanation:

1/4 th of the original means <u><em>2 half lives</em></u>

1 half life = 138 days

So,

2 half lives = 276 days

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Why is Carbon Tetrahydride a covalent bond? plzzz helpppp!!!!!!​
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Knowing Newton’s 2nd Law, how would you rearrange it to solve for acceleration.
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Car A, moving in a straight line at a constant speed of 20. meters per second, is initially 200 meters behind car B, moving in t
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First, let's express the movement of Car A and B in terms of their position over time (relative to car B)
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For Car B: y= 15x      Car B moves 15 meters every second and starts at our basis point

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3 years ago
Two identical twins hold on to a rope, one at each end, on a smooth, frictionless ice surface. They skate in a circle about the
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Answer:

Part a)

L = 2683.2 kg m^2/s

Part b)

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so here we will use

L = mv r + mvr

L = 2(78 \times 4.30 \times 4)

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Part b)

Since angular momentum is conserved here as there is no external torque

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Part c)

Work done by both of them = change in kinetic energy

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W = 2(\frac{1}{2}mv'^2 - \frac{1}{2}mv^2)

W = m(v'^2 - v^2)

W = 78(8.60^2 - 4.3^2)

W = 4326.7 J

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3 years ago
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