Which of the following surfaces will radiate heat energy best?
Red
White
Black
Yellow
Blue
Correct answer is C
No explanation has been provided for this answer.
120,000 W
30,000 W
333 W
300 W
30 W
Correct answer is B
P = mgh/t = (1000 × 10 × 60) ÷ 20 = 30,000 W.
Which of the following is a derived unit?
Metre
Coulomb
Kilogram
Second
Ampere
Correct answer is B
No explanation has been provided for this answer.
The motion of the prongs of the sounding tuning fork is
random
translational
rotational
vibratory
vibratory and rotational
Correct answer is D
No explanation has been provided for this answer.