60m
15m
5m
2m
Correct answer is C
\(\frac{\lambda}{2 \pi}\)
\(\frac{5}{2 \pi}\) = 5m
I,II and III only
II,III and IV only
I,III and lV only
l, ll and lV only
Correct answer is D
No explanation has been provided for this answer.
4.13x10 6J
4.13x10 5J
3.56x10 4J
3.56x10 2J
Correct answer is B
Q = mL + mcθ = 1 x 3.5 x 10 5 + 1 x 2.1 x 10 3 x 30
Which of the following is NOT a factor that can increase the rate of evaporation of water in a lake?
increase in the pressure of the atmosphere
rise in temperature
increase in the average speed of the molecules of water
increase in the kinetic energy of the molecules of water
Correct answer is A
No explanation has been provided for this answer.
Calculate the temperature change when 500J of heat is supplied to 100g of water
12.1oC
2.1oC
1.2oC
0.1oC
Correct answer is C
\(\theta = \frac{Q}{MC}\)
\(\theta = \frac{500}{0.1 \times 4200}\)