Specific heat capacity required practical questions (h)
4500
lise the graph to answer the following questions:
i) how much energy is needed to heat
up 1kg of water by 15°c?
3400
(2)
specific heat
capacity uveo
ii) how much energy is needed to heat
up a 15kg block of iron by 30°c?
(2)
1000
1000
400__
450_
iii) a 20kg concrete block is at 20°c & is
heated to 65°c. how much energy is
used to heat the block? convert your
answer to kilojoules (kl).
water
air
copper
tron
concrete
cotton
iv) a 250g copper pipe is heated from 10°c to 31°c.
(2)

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.