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photoshop1234 [79]
3 years ago
7

A rubber balloon is rubbed with a PVC pipe and the rubber balloon becomes positively charged. Why is this? a) Because the rubber

balloon gained protons from the PVC pipe. b) Because the rubber balloon gained electrons from the PVC pipe. c) Because the rubber balloon lost protons to the PVC pipe. d) Because the rubber balloon lost electrons to the PVC pipe
Physics
1 answer:
pentagon [3]3 years ago
4 0

Answer:

d)

Explanation:

Electrons are lost or gained when the ballon is rubbed with a PVC. As the rubber ballon lost electrons, it will have more protons, hence the positive charge. (More protons than electrons in the ballon).

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What type of friction is the type of kinetic friction that is difficult to overcome
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Answer:

Therefore, Static friction is the type of kinetic friction that is difficult to overcome.

Explanation:

Static friction is the frictional force acting between two surfaces which are attempting to move, but are not moving.

Kinetic friction is the frictional force acting between two surfaces which are in motion against each other.

3 0
4 years ago
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How much work is done by a car engine if the 1200kg car goes 13m up a hill and accelerates from 6 m/s to 7.5m/s?
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Coulomb's Law relates which of the following?
Maslowich

Answer:

The force between two charges and the distance separating them.

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4 0
4 years ago
A jogger moves from a position x =
vlada-n [284]

Answer:

3 m/s

Explanation:

We'll begin by calculating the change in displacement of the jogger. This can be obtained as follow:

Initial displacement (d₁) = 4 m

Final displacement (d₂) = 16 m

Change in displacement (Δd) =?

Δd = d₂ – d₁

Δd = 16 – 4

Δd = 12 m

Finally, we shall determine the determine the average velocity. This can be obtained as follow:

Change in displacement (Δd) = 12 m

Time (t) = 4 s

Velocity (v) =?

v = Δd / t

v = 12 / 4

v = 3 m/s

Thus, the average velocity of the jogger is 3 m/s

5 0
3 years ago
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