A scientific research boat uses pulses of ultrasound to detect fish underneath it. A pulse of ultrasound is bounced from a group of fish 6000 m directly below the boat. The next pulse is sent out 2.0 s after the echo from the previous pulse has been received. The speed of ultrasound in water is 1500 m/s. What is the interval between the two pulses?

A guitar string is made to vibrate. What makes the pitch of the note rise?

Compressions and rarefactions are sent out from a loudspeaker cone as it vibrates backwards and forwards. The frequen…

Water waves refract at a boundary between deep water and shallow water. What is the effect on the frequency, waveleng…

A balloon filled with air is gently heated. What happens to the mass and the density of the air inside the balloon?

A certain liquid is used in a liquid-in-glass thermometer. It does not expand uniformly with temperature. What effect…

An ice pack is used to cool 0.25 kg of water. The specific heat capacity of water is 4.2 kJ/(kg°C). How much thermal …