A speaker plays a steady note. A student turns the volume up without changing the note. Compared with before, the sound waves now reaching a nearby candle flame

Rosa shakes one end of a long rope up and down. She keeps the same number of shakes per second but moves her hand through a larger distance. The waves traveling along the rope now

A wave in a tank carries 6 J of energy. The operator doubles the wave's amplitude and leaves the frequency and the water unchanged. About how much energy does each wave now carry?

Waves of a fixed frequency deliver 7 J each when their amplitude is 1 cm. The amplitude is raised to 3 cm with the frequency unchanged. How much energy should each wave deliver?

A vibrating plate sends sound into a room. The plate is then adjusted so it moves only half as far from rest, vibrating at the same rate. The energy carried into the room becomes

Engineers test a model building on a shake table. They keep the shaking rate the same and increase how far the table swings side to side. Predict what happens to the model.

The table shows the energy delivered by water waves of one fixed frequency at four amplitudes. What pattern do the data show?

A sensor measures wave energy at a fixed frequency. At an amplitude of 1 cm it reads 2 J; at 2 cm, 8 J; at 3 cm, 18 J. What should it read at 4 cm?

In one tank at a fixed frequency, waves of amplitude 2 cm carry 5 J and waves of amplitude 4 cm carry 20 J. How much energy should waves of amplitude 6 cm carry?

The table lists the energy carried by waves of four amplitudes, all at the same frequency in the same tank. Which change in amplitude makes a wave carry four times as much energy?

Waves at a fixed frequency carry 100 J each at an amplitude of 4 cm. At which amplitude would waves in the same tank carry 25 J each?

Look at the bar graph. It shows the energy delivered by waves of four amplitudes at one fixed frequency. About how much energy does the wave of amplitude 3 cm deliver?

The table reports the amplitude, frequency and energy of four waves sent along the same spring. Which statement about the data is accurate?

A guitar string is plucked twice without retuning. The second pluck is harder, and that note sounds louder but at the same pitch. Which property of the sound wave is different?

Two water waves reach a raft, each arriving once every 5 seconds. The wave rising 2 m above rest level lifts the raft far higher than the wave rising 0.5 m. Which difference explains this?

A student claims a whistle must carry more energy than a drumbeat because the whistle sounds higher. The drumbeat rattles the windows and the whistle does not. Which evidence best challenges the claim?

A team wants to predict how much energy each wave in a tank will deliver to a floating paddle. The frequency and the water stay the same. Which measurement do they need?

Two sounds with the same pitch can still carry different amounts of energy.

Doubling a wave's amplitude while keeping its frequency the same doubles the energy it carries.

Two identical bells are struck. Both ring at the same pitch, but the bell struck harder is heard much farther across the field. Which property accounts for the extra energy carried?