If an object has more protons than electrons, then the net charge on the object is positive. If there are more electrons than protons, then the net charge on the object is negative. If there are equal numbers of protons and electrons, then the object is electrically neutral.
Source: https://www.khanacademy.org/science/ap-physics-1/ap-electric-charge-electric-force-and-voltage/electric-charge-ap/a/electric-charge-ap1
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Answer:
Energy conversion in flashlight.
Explanation:
When the switch of a flashlight is on, then the batteries inside them will be connected in a circuit and chemical energy from the batteries will be converted into electrical energy and then the electrical energy will be converted into light energy.
Light energy is also called electromagnetic energy.
Hence, among the given options the correct one is the first option that is:
1. Electrical energy into electromagnetic energy is the answer.
Answer:
c and d
Explanation:
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Answer:
a = 45 m/s/s
Explanation:
As we know that total mass of the rocket is

total mass of the fuel is given as

all the fuel is burnt in 15 s
so rate of the fuel burning is given as


now the thrust force on the rocket is given as


so we have

so we have


now acceleration is rate of change in velocity

so acceleration at t = 15 s
