Answer:
5.9 km/hour
Explanation:
divide 12.5 by 2.1 and the answer is 5.9
Answer:
N3+3H2----->3NH2
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Red dwarfs include the smallest stars commonly weighing between 0.075 to 0.50 percent the mass of the sun, their small size means they burn at a slower rate meaning a dwarf star is to long exceed the life of the universe, their reduced mass also means their surface is very cool
Answer:
maximum kinetic energy is for Pulley
e) The pulley
Explanation:
Let 4 kg block is moving downwards with speed "v" so we can say that 2 kg block will move upwards with same speed "v"
Now we know that pulling is in pure rotational motion
so we will have


now kinetic energy of each is given as
For 4 kg block

for 2 kg block

For pulley



So maximum kinetic energy is for Pulley
Before a star is born, the matter that will become the star exists as a interstelar gas and dust. The stars are formed as a result of the forces:the force of gravity compresses atoms in the interstellar gas. Then the fusion reaction begins. During this fusion reaction the temperature gets extremely high and all the material evolves into a hot bright star.