DP Physics - B.1 Thermal Energy Transfers

• 1/16 Po

• 1/2 Po

• 2 Po

• 16 Po

Answer explanation

• Mv^2 / 4mc

• Mv^2 / 2mc

• mv^2 / 4Mc

• mv^2 / 2Mc

Answer explanation

• 1 and 2

• 4 and 5

• 3 and 4

• 1 and 4

• None of them

Answer explanation

• T/2 and P/16

• T/2 and P/4

• 2T and 4P

• 2T and 16P

Answer explanation

The amount of heat released when 100 g of steam turns to water is 2.27 x 10^5 J.

What is the specific latent heat of vaporization of water?

• 2.27 x 10^6

  J/kg

• 2.27 x 10^6

  J kg

• 2.27 x 10^3

  J/kg

• 2.27 x 10^3

  J kg

Answer explanation

A 75 kg free fall parachutist falls at a constant speed of 50 m/s. Calculate the

amount of energy given to the surroundings per second. State the answer in 2 S.F. Answer: __x 10^4J

The length of a column of liquid is 30 cm at 100 °C and 10 cm at 0 °C. At what

temperature will its length be 12 cm? Answer = __ ° C