<span>(kg) Melting Point of Tin
</span>
Answer:
10 m/s
Explanation:
Use the kinetic energy formula:
KE=(1/2)mv^2
I always remember it as Kevin is half-mad, and very square.
25J = (1/2)*0.5kg*(v^2)
50J = 0.5kg*(v^2)
100J = v^2
v = 10 m/s
Check it:
KE = (1/2)*0.5*(10^2)
KE = 25J
yep, it's right!
Solids have the highest density. Then comes liquid and the less dense one is gas.
The total distance covered by the person is 12 times the height of each stair:

The work done by the person to climb the stairs is equal to the increase in his gravitational potential energy:

And therefore, the power generated by the person in 12 s is the work done divided by the time taken:

So, the correct answer is B.
Answer:
Acceleration is the rate of change of velocity. If an object is changing its velocity, its speed, or changing its direction, then it is said to be accelerating.
Explanation:
when you change directions or speed up you are accelerating (or decelerating) and when you change directions or speed its called velocity.