A singer raises his pitch one octave. what quality of the sound wave has changed? the frequency has increased. the wavelength has increased. the amplitude has increased. the speed has increased.

In a radio, pulse modulation refers to encoding a wave with information by: a) adjusting the height of the waves b) adjusting how many waves are produced per second c) turning the wave on and off d) changing the medium in which the waves travel

Explain in terms of energy flow how a cold pack works on a sprained ankle

If it requires 5.0 j of work to stretch a particular spring by 1.8 cm from its equilibrium length, how much more work will be required to stretch it an additional 3.7 cm?

How does heat affect the motion of particles and solids and liquids?

A car moves with a speed of 30 metres per second calculate the distance travelled in 30 seconds

Measurements of how orbital speeds depend on distance from the center of our galaxy tell us that stars in the outskirts of the galaxy. True or False

Identify what is required to calculate the atomic number and atomic mass of an element

What device is used to measure the current in a circuit

A lever allows a 35 N load to be lifted with a force of 7 N. What is the mechanical advantage of the lever?

An object moves from the position + 16m to the position + 43m in 12s. What us the total displacement