the graph shows how temperature varies with time as is it heated (not drawn to scale). explain what is happening to the substanc
e in sections AB and BC of the graph
2 answers:
You might be interested in
Answer:
20 J
Explanation:
Kinetic energy is given as half of the product of mass and the square of velocity of an object:
KE =
where m = mass = 40 kg
v = velocity = 1 m/s
Hence, Mary's kinetic energy is:
KE =
KE = 20 * 1 = 20 J
She has a kinetic energy of 20 J.