Questions I Typically Dont Get

Question 1

If a student is investigating how the R of wire varies with length, why should they adjust the VR each time she changed the length?

Answer 1

Because the VR changes the resistance of the circuit to keep the current the same so the temperature of the wire is kept constant.

Question 2

What fuel is wood and what are two environmental impacts of burning wood

Answer 2

Causes air pollution, destruction of habitats

Question 3

Why would the temp of the water stays constant even if it’s still being heated

Answer 3

Energy dissipates to surround at same rate that energy is transferred to the water

Question 4

Is source A has a longer half life then source B what can be deduced

Answer 4

Source A nuclei more stable then the nuclei in source B

Question 5

Why when a kangaroo jump higher as speed increases

Answer 5

The extension of tendon increases so the EPE increases which is transferred to GPE

Question 6

If circuit A is a series circuit with V connected in parallel and A connected in series and B is parallel circuit what would the readings on the A and V show

Answer 6

V = reading is the same in both
A - reading in B is twice the reading of A