3 years ago

A _______ is a tool often used to measure the amount of force exerted by an object

Physics

1 answer:

Marina86 [1]3 years ago

4 0

Answer:

Force meter

Explanation:

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Which of these is a result of gravitational lensing?

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2 years ago

When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of

algol13

Answer:

0.0768 revolutions per day

Explanation:

R = Radius

$\omega$ = Angular velocity

As the mass is conserved the angular momentum is conserved

$I_1\omega_1=I_2\omega_2\\\Rightarrow \frac{I_1}{I_2}=\frac{\omega_2}{\omega_1}$

Moment of intertia for solid sphere

$I_1=\frac{2}{5}MR^2\\\Rightarrow I_1=0.4MR^2$

Moment of intertia for hollow sphere

$I_2=\frac{2}{3}M(4.3R)^2\\\Rightarrow I_2=12.327MR^2$

Dividing the moment of inertia

$\frac{I_1}{I_1}=\frac{0.4MR^2}{12.327MR^2}\\\Rightarrow \frac{I_1}{I_2}=0.032$

From the first equation

$\omega_2=\omega_1\frac{I_1}{I_2}\\\Rightarrow \omega_2=2.4\times 0.032\\\Rightarrow \omega_2=0.0768\ rev\day$

The angular velocity, in revolutions per day, of the expanding supernova shell is 0.0768 revolutions per day

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3 years ago