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Lelechka [254]
3 years ago
10

Which statements are true about galaxies, stars, and the universe? (more than one true answer by the way)

Physics
1 answer:
Elina [12.6K]3 years ago
8 0

Answer:

statements <em><u>2, 3, 4, and 7</u></em> are true

Explanation:

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A Red Rider bb gun uses the energy in a compressed spring to provide the kinetic energy for propelling a small pellet of mass 0.
Kay [80]

Answer:

a.6.5025 J

b.6.5025 J

Explanation:

We are given that

Mass of pellet,m=0.27 g=0.27\times 10^{-3} kg

1 kg=1000 g

Spring constant,k=1800 N/m

x=8.5 cm=8.5\times 10^{-2} m

1m=100 cm

a.Potential energy stored in the compressed spring  is given by

P.E=\frac{1}{2}kx^2

P.E=\frac{1}{2}(1800)(8.5\times 10^{-2})^2

P.E=6.5025 J

b.By using law of conservation of energy

P.E of spring=K.E of the pellet

K.E of the pellet=6.5025 J

6 0
3 years ago
Which will change if you turn up a radios volume
MArishka [77]
The amplitude of the sound waves coming out of the speaker
or headphones will increase, and your little brother will start
banging on the wall and telling you to turn it down.
6 0
3 years ago
given the question on measuring gravitational acceleration with a pendulum and given results how do I calculate the questions?​
balu736 [363]

Answer:

Hindi ko po alam

Explanation:

Kaya sa iba ka nalang mag tanong kac Bobo ako jaan

4 0
2 years ago
Atoms of the same element can have different properties.<br><br> A) True<br><br> B) False
vladimir2022 [97]

Answer:

False.

Explanation:

All atoms of the same element have the same number of protons, but some may have different numbers of neutrons.

6 0
3 years ago
The experimenter fom the video rotates on his stool, this time holding his empty hands in his lap. You stand on a desk above him
gtnhenbr [62]

Answer:

Explanation:

The experimenter is rotating on his stool with angular velocity ω ( suppose )

His moment of inertia is I say

We are applying no torque from outside . therefore , the angular momentum will remain the same

Thus angular momentum L = I ω = constant

Thus we can say I₁ ω₁ = I₂ω₂ = constant

here I₁ is the initial moment of inertia and ω₁ is the initial angular velocity

Similarly I₂ is the final moment of inertia and ω₂ is the final angular velocity

When a been bag is dropped on his lap , his moment of inertia increases due to increase in mass

In the above equation, when moment of inertia increases , the angular velocity decreases . So its motion of rotation will decrease .

7 0
3 years ago
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