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)

what type of charge does it have? negative

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.