What is the difference between a mixture
and a compound?
What are the three methods by which heat
travels?
What force does a car have to overcome
when it starts moving?
What do we call the point about which a
lever turns?
Oil is used to reduce what?
What is an abacus?
What are the two ways by which nuclear
energy is produced?
Centrifugal force pushes things outwards.
What do we call the force that pulls objects inwards?
Why do streamlined vehicles use less
fuel?
What simple machines are often used to
change the direction of a force?
In the middle ages what use did candles
have apart from illumination?
What was unusual about the Heinkel He
178?
What was notable about Focke-Wulf 61?
Which time-keeping device had the most
moving parts?
Which time-keeping device had no moving
parts?
What is the cause of the apparent bending
of the stick when it is thrust into the water?
If three light bulbs were wired in
parallel and three identical ones were wired in series,
which would be the brighter?
If you wire up a small torch bulb in an
electrical socket containing a fresh lemon, the bulb will
light. True or false?
Nutcrackers are what sort of mechanical
device?
Why are drainage inspection covers
usually round?