(1) if you heated a big stone and a small stone in a fire,which would store more energy?explain
(2) a car and a heaavy truck are moving along a main road side by side. which has more kinetic energy explain
(1) if you heated a big stone and a small stone in a fire,which would store more energy?explain
(2) a car and a heaavy truck are moving along a main road side by side. which has more kinetic energy explain
1.Big stone has a higher specific heat capacity.
Specific heat is the amount of heat needed to raise the temperature of one kilogram of mass by 1 kelvin.So big stones store more energy.
2. Let's solve this problem mathematically and then we could come to a conclusion which would be our answer.
As we know that
K.e= 1/2*mass *velocity^2.
Here according to what you asked, the velocity of both the truck and the car are equal . now let us analyse the k.e of both
1)k.e of car
Let the mass=m
Velocity=v
So the k.e=1/2*m*v^2………………….. (1)
2) k.e of the truck
Let the mass= M
Velocity=v
So k.e=1/2*M*v^2………………………(2)
When we compare (1) and(2) we find that all other quantities being the same cancel out each other. But the mass of the truck(M)being much greater than that of the car(m), the truck will have more kinetic energy than the car.
Specific heat is the amount of heat needed to raise the temperature of one kilogram of mass by 1 kelvin.So big stones store more energy.
2.
Let's solve this problem mathematically and then we could come to a conclusion which would be our answer.
As we know that
K.e= 1/2*mass *velocity^2.
Here according to what you asked, the velocity of both the truck and the car are equal . now let us analyse the k.e of both
1)k.e of car
Let the mass=m
Velocity=v
So the k.e=1/2*m*v^2………………….. (1)
2) k.e of the truck
Let the mass= M
Velocity=v
So k.e=1/2*M*v^2………………………(2)
When we compare (1) and(2) we find that all other quantities being the same cancel out each other. But the mass of the truck(M)being much greater than that of the car(m), the truck will have more kinetic energy than the car.
