@All the water in a kettle is hot because of:
Convection
Conduction
Radiation

@Which unit is used to measure energy?
Joule
Watt
Coulomb

@On a high mountain water boils at a temperature:
below 100C
above 100C
at 212C

@Which of these expands the least when heated?
Solids
Liquids
Gases

@Since cork floats on water, which one of these statements is correct?
Density of cork is less than the density of water
Density of cork is greater than the density of water
The densities of cork and water must be exactly equal

@Two, thin, tubes are placed in water as shown. After a few days, what will be seen?
#capil
The water in the smaller tube will have risen more than the larger tube
No change
Water in the larger tube will have risen much more than the smaller one

@In a cloud chamber the tracks of alpha particles are:
Long and straight
Short and curved
Totally invisible

@Which unit is used to measure potential difference?
Volt
Ampere
Watt

@Which one of the following is NOT a primary colour?
Yellow
Red
Green

@What do waves carry from one place to another?
Energy
Heat
Light

@A shadow will have an umbra and penumbra if:
An extended source is used
A point source is used
A large object is used

@A person sits on the edge of a swimming pool, looking into the water at the bottom of the pool. The depth of the pool looks, to the person:
Shallower than it really is
Deeper than it really is
Exactly the same depth, wherever they look

@What is ultra-sonic sound?
Sound waves of a very high frequency
Very quick moving sound waves
Long wavelength sound waves

@Electrical power is sent around the country by the National Grid. Very high voltages are used because:
energy losses are kept to a minimum
high currents need to be generated
large distances have to be covered

@Which of these devices could you use to detect charge?
Electroscope
Joule meter
Wheatstone bridge

@If an alternating voltage is applied to the Y-plates of an oscilloscope then the trace will:
Oscillate up and down
Do nothing
Move upwards

@1 Watt is:
The rate of using energy at a rate of 1 Joule per second
Moving 1 Kg a distance of 1 m
Lifting a 1Kg mass up 1 m in 1 minute

@Frictional forces are:
a negative accelerating force
forces which always make acceleration forces larger
nothing to do with accelerating forces

@A submarine is deep underwater. A pressure p1 pushes on the sides and a pressure p2 pushes from below. Which one of these statements is correct?
p1 = p2
p1 is greater than p2
p2 is greater then p1

@Which one of the following ideas would not help to make an object more stable?
Putting extra mass on top of it
Making the base wider
Making the centre of gravity lower

@Which of the following is a vector?
Force
Mass
Temperature

@Adding salt to boiling water does what to its boiling point?
Raises it
Lowers it a little
Lowers it a lot

@If boiling water is poured onto a frozen windscreen in winter it shatters. This is because:
The glass expands very rapidly
The glass contracts quickly
The ice melts, turning into steam

@Lead has a density of 11.4 g/cm. What would be the mass of 5 cm of lead
57g
11.4g
2.28g

@What can be said about the air molecules inside a fridge, compared to those in the room?
They are moving more slowly
They are colder
They are smaller
