physics: density and pressure, waves

Explain how pressure changes on the bottom of a tank when more water is added to the tank.(2)

greater pressure on the bottom of the tank

with greater force of water

Suggest 1 reason why the atmospheric pressure is greater at 2000 m than at 6000 m.(1)

greater density of atmosphere

Explain why a person exerts a different pressure on the bed when standing up than when lying down.(2)

area is smaller when standing up

same weight so pressure greater when standing up

Describe a transverse wave.(2)

perpendicular to the wave’s direction of travel
oscillations

Both hooves have the same mass.Explain how a camel’s hoof is a more suitable shape than the donkey for walking on soft ground.(2)

C hoof has greater SA than donkey

C hoof exerts less pressure than if it was smaller

C is less likely to sink
as the same weight is spread out

Discuss the pros and cons of using each method to find the volume of the unknown liquid.(3)

reading the measuring cylinder is easier and quicker to use

measuring cylinder could be incorrect due to parallax errors

bottle allows density to be more precisely determined