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➷ A dry cell changes chemical energy into electrical energy.
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Answer:
0.084 kg
Explanation:
I = 0.80 N-s (East wards) = 0.80 i N-s
u = 3.8 m/s = - 3.8 i m/s
v = 5.7 m/s = 5.7 i m/s
Let m be the mass of bat.
I = m (v - u)
0.8 i = m ( 5.7 i + 3.8 i)
0.8 i = m x 9.5 i
m = 0.084 kg
Answer:
<em>If the distance doubles, the gravitational force is divided by 4</em>
Explanation:
<u>Newton’s Universal Law of Gravitation
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Objects attract each other with a force that is proportional to their masses and inversely proportional to the square of the distance.

Where:
m1 = mass of object 1
m2 = mass of object 2
r = distance between the objects' center of masses
G = gravitational constant: 6.67\cdot 10^{-11}~Nw*m^2/Kg^2
If the distance between the interacting objects doubles to 2r, the new force F' is:

Operating:

Substituting the original value of F:

If the distance doubles, the gravitational force is divided by 4
Answer: in an electrical circuit, electricity flows one direction: out of the positive terminal of a battery and back into the negative terminal.
Explanation: