Complete question is;
Which action would increase the strength of the electric force between the balloon and the water?
A. Holding a magnet near the stream of water
B. Holding the balloon closer to the stream of water
C. Holding a magnet near the balloon
D. Moving the balloon farther away from the stream of water
Answer:
B. Holding the balloon closer to the stream of water
Explanation:
When we take a charged balloon near water, what happens is that it makes electrons to be pushed away which in turn leaves the area to be positively charged. This area is now attracted to the balloon and thus the strength of the electric force between the balloon and the water is increased.
The velocity of the ball is 12.5 m/s
Explanation:
The velocity of the ball is given by the ratio between the distance covered by the ball and the time taken:

First, we calculate the distance covered. We know that the radius of the circle is
r = 0.450 m
And the length of the circumference is

The ball makes 25.0 revolutions, so a total distance of

In a time of
t = 9.37 s
So, its velocity is

Learn more about velocity here:
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Answer:
The mass of the body is 50 kg.
Explanation:
We have,
Force acting on a body is 100 N
Acceleration of the body is 2 m/s²
It is required to find the mass of the body. The force acting on a body is given by :
F = ma

So, the mass of the body is 50 kg.
I think the correct answer from the choices listed above is the second option. <span>In order to meet the demands for new matter, Earth's resident must recycle the available matter. Hope this answers the question. Have a nice day.</span>
Answer:
Mechanical advantage of the ramp = 
Efficiency of the ramp =
= 
Explanation:
i) Mechanical advantage of the ramp = 
ii) Efficiency of the ramp =
= 