3 years ago

If the half-life of a decaying isotope is 10 years, which statement is true after 10 years?

Physics

1 answer:

Alja [10]3 years ago

3 0

Answer:

no is the most expensive but u have

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Answer:

V = 0.39 m/s

Explanation:

Given that,

Mass of hockey puck, m = 0.2 kg

Mass of goalie = 40 kg

Speed of hockey puck, v = 80 m/s

We need to find the speed with which the goalie slide on the slide. Let V be the speed. Using the conservation of momentum as follows :

$mv=(M+m)V\\\\V=\dfrac{mv}{M+m}\\\\V=\dfrac{0.2\times 80}{0.2+40}\\\\V=0.39\ m/s$

So, the required speed is 0.39 m/s.

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-- 75 km/hour

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