Answer:
Book of mass 2 kg is lifted from floor to the table. The height between floor and the table is 1.5 m. Calculate the work done by gravitational force.
<u>Answer</u>
Part 1) Increase
Part 2) expand
Part 3) rise
<u>Explanation</u>
When the air is heated the molecules gain kinetic energy and starts to collide with walls of the ballon making it to increase it size.
Thus the volume of the balloon expands. When this happens the balloon and its content becomes less dense and it rises.
Answer:
The distance is
Explanation:
From the question we are told that
The coefficient of static friction is
The initial speed of the train is
For the crate not to slide the friction force must be equal to the force acting on the train i.e
The negative sign shows that the two forces are acting in opposite direction
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From equation of motion
Here v = 0 m/s since it came to a stop
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This is because of of the heating effect of a current. The glow is a result of current passing through the filament. The current experiences resistance as a result heat is generated. When resistance is at zero, there potential differences is not needed hence temperature generated will be at a constant.
It is TRUE, Force is proportional to the product of the masses and inversely proportional to the square of the distance between them.