Who discovered that the proton has a positive charge

Most people can detect frequencies as high as 20 000 Hz. Assuming the speed of sound in air is 345 m/s, determine the wavelength of the sound corresponding to this upper range of audible hearing.

If the speed of light in air is 3.00 · 108 m/s (approximately equal to that in a vacuum) and the speed of light in water is 2.25 · 108 m/s, what is the index of refraction of water?

What is the acceleration experienced by a car that takes 10 s to reach 27 m/s from rest?

Which type of energy travels through space in the form of waves

Which quantity is scalar? (1) velocity (2) speed (3) displacement (4) acceleration

Aerogenerators are used to produce electricity from

Explain why science is a continuous progression of study

If your at the mall with your friends and they shoplift what would you do

Fluid is leaking from an axle seal. Technician A says to remove the wheel and check for incorrectly installed brake components. Technician B says to check for obstructions at the differential breather.

All matter we encounter in everyday life exists in one of three physical formss True or False.