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trasher [3.6K]
3 years ago
6

How may stars are in the sky

Physics
2 answers:
Veseljchak [2.6K]3 years ago
7 0
Is impossible say how many stars are in the sky haha
sergeinik [125]3 years ago
4 0
It is impossible of how much stars in the sky
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A box sits on a table. A short arrow labeled F subscript N points up. A short arrow labeled F subscript g points down. A long ar
Aloiza [94]

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unbalanced and right

Explanation:

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2 years ago
What invisible force will cause you to fall to the earth if you fall off your bed?
Katyanochek1 [597]

Answer:

The answer to this is falling all the way through the Earth is impossible, since its core is molten. ... As you approached the center of the earth the pull of gravity would decline and eventually (at the center) cease, but inertia would keep you going.

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3 years ago
What causes a objects to move or stay still? claim and evidence
jek_recluse [69]

Answer:

A force

Explanation:

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4 0
2 years ago
Calculate the distance traveled by a projectile as a function of launch angle. Compare the distances for two projectiles launche
DaniilM [7]

Answer:

R = x_{max} = \frac{v^2\sin(2\theta)}{g}\\\frac{R_1}{R_2} = \frac{\sin(2\theta_1}{\sin(2\theta_2}

Explanation:

Using kinematics equations:

\Delta x = v_{0x}t\\\Delta y = -\frac{1}{2}gt^2+v_{0y}t

Use \Delta y = 0 due to condition of distance traveled.

Solving second equation for time, there are two solutions. t=0 and

t=\frac{2v_{0y}}{g}

Use the expression in the first equation to have

R = \frac{2v^2 \cos\theta\sin\theta}{g}

Using trigonometric identities, you have the answer of the distance.

By doing the ratio for two different angles, you have the second answer. Due to sine function properties, the distances can be the same to complementary angles. Example, for 20° and 70°, the distance is the same.

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3 years ago
How can you change the phases of matter using thermal energy
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These energy exchanges are not changes in kinetic energy. They are changes in bonding energy between the molecules. If heat is coming into a substance during a phase change, then this energy is used to break the bonds between the molecules of the substance.

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