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- @All the water in a kettle is hot because of:
- Convection
- Conduction
- Radiation
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- @Which unit is used to measure energy?
- Joule
- Watt
- Coulomb
-
- @On a high mountain water boils at a temperature:
- below 100°C
- above 100°C
- at 212°C
-
- @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
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- @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
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- @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
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- @Lead has a density of 11.4 g/cm³. What would be the mass of 5 cm³ 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
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