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- @When a liquid evaporates, what other effect might you notice?
- The liquid left behind is cooler
- The liquid left behind expands
- The liquid left behind is not changed in any way
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- @Bridges are sometimes built with one end on a roller because:
- Hot weather makes them expand
- Strong winds cause them to move
- They do not have to be made so accurately
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- @The energy an object has because of its height is called:
- Potential energy
- Kinetic energy
- Displacement energy
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- @The following radiations were put through a magnetic field. Which is in the corect order ofincreasing deflection?
- Gamma, alpha and beta
- Alpha, beta and gamma
- Beta, gamma and alpha
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- @What is the unit used to measure the work done by a force?
- Joule
- Watt
- Newton
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- @How many colours are there in the spectrum?
- Seven
- Eight
- Six
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- @Shadows are caused because:
- Light travels in straight lines
- All objects block light
- Light can be reflected
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- @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
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- @Which of the following is true?
- Sound travels faster in water than in air
- Sound does not travel through water
- Sound travels slower in water than in air
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- @Which one of the symbols shown is a thermistor?
- #cir2
- Symbol 3
- Symbol 1
- Symbol 2
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- @Transformers change:
- One a.c current into another a.c current
- A d.c current into an a.c current
- An a.c current to a d.c current
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- @The electroscope is charged. As a charged rod is brought near the metal cap (y) the leaf (x) falls. This shows:
- #escope
- the rod has an opposite charge to the electroscope
- the electroscope is losing charge
- the electroscopes charge must be the same as the rods
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- @If one ampere is flowing through a circuit then
- 1 coulomb is flowing each second
- There is 1 ohm of resistance in the circuit
- Each coulomb carries 1 joule of energy
-
- @Electrons are emitted by:
- Cathode
- Anode
- X-plates
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- @What units are work measured in?
- Joules
- Watts
- Newtons
-
- @A ticker tape is produced where the dots are evenly spaced. This means the object was:
- Moving at a constant velocity
- Accelerating
- Stationary
-
- @Which one of the following is correct
- Mass never changes, but weight can vary
- Mass and weight never change
- Mass changes, but weight always remains the same
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- @Which one of the following is not magnetic?
- Mercury
- Nickel
- Cobalt
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- @The diagram shows four velocity-time graphs. Which is the correct shape for an object moving at a constant velocity?
- #mot2
- Graph w
- Graph z
- Graph x
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- @In a liquid pressure does NOT depend on which one of the following?
- Area
- Density of liquid
- Gravity
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- @If a person wanted to loosen this nut, where would be the best place and distance to apply a force?
- #tur1
- At x
- At w
- At z
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- @Liquids cool after evaporation because:
- only slower moelcules with less energy are left behind
- all the molecules left behind speed up
- the molecules left behind get smaller
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- @Which one of the following (if they are all exactly the same size) expands the most when heated?
- Copper
- Brass
- Invar
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- @10 cm³ of glass has a mass of 25g. What is the density of glass?
- 2.5 g/cm³
- 250 g/cm³
- 0.4 g/cm³
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- @How are the air molecules inside a hot oven different to those in the kitchen?
- They are moving faster
- They are larger
- They are warmer
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