The difference between heat and temperature

What is sound and how does it produce?

The shortest wavelengths occur in the:red end of the spectrumblue end of the spectrummiddle of the spectrum The light-gathering capacity of a telescope is dependent upon the:magnificationfocal lengthsize of human irisarea of aperture

An electromagnetic wave is composed of electrical and magnetic energy.

Why do remote controls for TV's use infrared waves to communicate?

Which object has elastic potential energy? a piece of bread a ball at rest a stretched rubber band a falling leaf

What is the kinetic energy of a 1kg ball that moves at 5m/s

A physics professor demonstrates the Doppler effect by tying a 600 Hz sound generator to a 1.0-m-long rope and whirling it around her head in a horizontal circle at 100 rpm.

What is it called when light shining on certain substances causes an electric current to flow? the polarized light phenomena infrared radiation the photoelectric effect the Einstein conclusion

before colliding, the momentum of block A is + 25.0 kg*m/s, and block b is + 35.0 kg*m/s. after, block a has a momentum + 60.0 kg*m/s. what is the momentum of block b afterwards?

A ball is thrown downward at 5ms from roof 10m high its velocity when it reaches the ground is?,