the temperature rises and the ice expand
the temperature remains constant and the volume of the ice decreases
the ice gives out heat as it melts and the temperature decreases
the mass remains constant and the temperature increases
the temperature decreases because some heat is lost
Correct answer is B
No explanation has been provided for this answer.
An example of a scalar quantity is
velocity
weight
electric charge
acceleration due to gravity
momentum
Correct answer is C
No explanation has been provided for this answer.
0.5\(\Omega\)
1\(\Omega\)
2\(\Omega\)
2.5\(\Omega\)
3\(\Omega\)
Correct answer is E
1 = \(\frac{E}{R + r}\)
\(\frac{2}{R + 1}\) = 0.5
0.5R = 2 - 0.5 = 1.5
R = \(\frac{1.5}{0.5}\)
= 3\(\Omega\)
Which of the following is NOT an effect that can be produced by an electric current?
heat
light
sound
motion
none of the above
Correct answer is E
No explanation has been provided for this answer.
i, ii and iii
i, ii and iv only
i and ii only
i and ii only
all four statements
Correct answer is B
No explanation has been provided for this answer.