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Tom [10]
3 years ago
7

O be useful in science, a hypothesis must be *

Physics
2 answers:
Lorico [155]3 years ago
4 0
Answer: C the hypothesis must be testable
shepuryov [24]3 years ago
3 0

Answer:

the answer is c testable

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What will happen if a car experiences a 300 N force to the right from the engine and a separate 150 N force due to friction and
gayaneshka [121]

Force applied on the car due to engine is given as

F_1 = 300 N towards right

Also there is a force on the car towards left due to air drag

F_2 = 150 N towards left

now the net force on the car will be given as

\vec F_{net} = \vec F_1 + \vec F_2

now we can say that since the two forces are here opposite in direction so here the vector sum of two forces will be the algebraic difference of the two forces.

So we can say

F_{net} = F_1 - F_2

F_{net} = 300 - 150

F_[net} = 150 N

So here net force on the car will be 150 N towards right and hence it will accelerate due to same force.

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3 years ago
When enough ____ is added to the substance, the solid reaches its ____ point and becomes a liquid
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Answer:  When enough __energy__ is added to the substance, the solid reaches its _melting_ point and becomes a liquid

Explanation: since energy is being added the substance changes phase into a liquid .

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lilavasa [31]
Both planets are similar in shape and have a rocky surface. Not sure about the phases though
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What happens to the speed of the
Andrew [12]

Answer:

The speed stays constant after the force stops pushing.

Explanation:

Speed always stays constant when the force stops pushing it.

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If a roller coaster train has a potential energy of 1,500 J and a kinetic energy of 500 J as it starts to travel downhill, its t
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E_{total} = KE + PE \\ KE = 500 J \\ PE = 1500 J \\ E_{total} = 500J + 1500J \\ E_{total} = 2000J
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