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lawyer [7]
3 years ago
6

What is the number at the end of an isotope’s name?

Physics
1 answer:
Lera25 [3.4K]3 years ago
6 0

Explanation:

The liquid contains only one element. -The liquid is a pure substance. The number at the end of an isotope's name is the -mass number. While looking at xenon (Xe) on the periodic table, a student needs to find an element with a smaller atomic mass in the same group.

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The cheetah can run a distance of 275 m for 9 seconds. Calculate its speed.
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3 years ago
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A uniform cylindrical grindstone has a mass of 10 kg and a radius of 12 cm. (a) What is the rotational kinetic energy of the gri
Drupady [299]

Answer:

a) KE = 888.26J

b) N = 294.5 turns

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KE = I/2*\omega_o^2

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I=m/2*R^2=0.072kg.m^2

So, the kinetic energy will be:

KE = 888.26J

Now, friction force is:

Ff = μ*N = 0.80*5N = 4N

The energy balance would be:

Kf - Ko = Wf    where Kf=0;   Ko = 888.26J;  and Wf is the work done by friction force.

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-888.26=-0.96*π*N

N=294.5 turns

6 0
3 years ago
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