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3 years ago

Which stars have the lowest absolute brightness?

Physics

2 answers:

Zielflug [23.3K]3 years ago

7 0

Answer:

Dwarfs

Explanation:

I got it right on my test :)

Hope this helped!~

xox

Finger [1]3 years ago

3 0

Answer:

DWARFS

Explanation:

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For Al, its atomic number is 13 and its mass number is 27. How many neutrons does it have?

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Answer:

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3 years ago

In the figure, a weightlifter's barbell consists of two identical small but dense spherical weights, each of mass 50 kg. These w

kondaur [170]

The moment of inertia is $24.8 kg m^2$

Explanation:

The total moment of inertia of the system is the sum of the moment of inertia of the rod + the moment of inertia of the two balls.

The moment of inertia of the rod about its centre is given by

$I_r = \frac{1}{12}ML^2$

where

M = 24 kg is the mass of the rod

L = 0.96 m is the length of the rod

Substituting,

$I_r = \frac{1}{12}(24)(0.96)^2=1.84 kg m^2$

The moment of inertia of one ball is given by

$I_b = mr^2$

where

m = 50 kg is the mass of the ball

$r=\frac{L}{2}=\frac{0.96}{2}=0.48 m$ is the distance of each ball from the axis of rotation

So we have

$I_b = (50)(0.48)^2=11.5 kg m^2$

Therefore, the total moment of inertia of the system is

$I=I_r + 2I_b = 1.84+ 2(11.5)=24.8 kg m^2$

Learn more about inertia:

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3 years ago

How are newtons third law of motion applies to a system of objects

11111nata11111 [884]

Answer:

Newton's third law of motion states that whenever a first object exerts a force on a second object, the first object experiences a force equal in magnitude but opposite in direction to the force that it exerts. ... Newton's third law is useful for figuring out which forces are external to a system.

Explanation:

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3 years ago

What is impulse measured in

MrMuchimi

Impulse = Force * time

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3 years ago

50. The potential energy of a spring is 0.3 J when it is compressed 0.04 m to the left of its equilibrium

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Answer:

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Explanation:

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3 years ago