The water at the bottom of a waterfall is slightly warmer than that at the top because part of the
potential energy raises the water temperature
water absorbs latent heat from the atmosphere
kinetic energy is changed into internal energy
dropping mass of water increases the heat capacity
A and C above
Correct answer is C
No explanation has been provided for this answer.
Which of the following does NOT cause a reduction of the surface tension of water?
soap solution
detergent
alcohol
camphor
grease
Correct answer is E
No explanation has been provided for this answer.
The motion of the moving skin of a talking drum can rightly be described as
translational
random
rotational
oscillatory
transitory
Correct answer is D
No explanation has been provided for this answer.
0.36
0.46
0.56
0.76
0.86
Correct answer is C
Heat lost = heat gained
moCo\(\theta\)o = mwCw\(\theta\)w
100 x Co x (25 - 9) = 150 x Cw x (15 - 9)
\(\frac{C_w}{C_w}\) = 0.56
temperature is a measure of the average kinetic energy of the molecules of a substance
heat is a measure of the total kinetic energy of the molecules in a system
different materials require different amounts of heat to cause a given change in temperature
all of the above
A and B only
Correct answer is D
No explanation has been provided for this answer.