Physics

Nuclear energy is the energy in the nucleus, or core, of an atom. Atoms are tiny units that make up all matter in the universe. Energy is what holds the nucleus together. There is a huge amount of power in an atom's dense nucleus. Nuclear energy is seen when nuclear fusions or fissions happen.

chemical

ELECTRICAL

No it is not bad, as some ladies have a heavy period for one month and then a light one or they may have two heavy periods and then one light one also.

kinetic

kinetic

True - apex =)

Kinetic energy is equals to 0.5mv² where m is the mass in kilograms and v is the velocity in ms-1

So, for a bicycle of 10kg moving at 10ms-1,
K.E
= 0.5mv²
= 0.5(10)(10²)
= 500 J

Nope. One of the strongest pillars of Physics is the fact that energy is never

destroyed. Energy lost to friction is no longer available to do the job that

you happen to need it for, but it's still there, and it shows up as heat.

400 kg-m/s

100 J

10,000 kg-m/s

the momentum must be greater than the force . the force may be very large

work=mass*speed,5*2=10

Assuming the impact was elastic, Car1 will not be at rest, and Car2 will move at 20m/s at the same direction Car1 was previously moving.

Law of conservation of momentum.

Some northern states made slavery against the law.

If a machine has 100 percent efficiency, the output work = the input work. That's actually basically what the efficiency of a machine is - output work / input work * 100.

That depends on the liquid and the solid. Liquid mercury has a very high density. Liquid gasoline has a very low density. At the melting point the density of a liquid and a solid are almost the same.

false

10kg