what's velocity in physics

Assume light is traveling through an optical medium of n1 and is incident on a boundary with a different optical medium with n2.

9. The most important member of the convention was a ___-year-old scholarly lawyer from Virginia, James Madison A. 46 B. 26 C. 36 D. None of the above

Which substance is an example of an element? bronze copper methane rust

A grindstone spinning at the rate of 8.3 rev's has what approximate angular speed? a. 3.2 rad/s b. 26 rad/s e. 52 rad/s d. 8t rad/s

A 6 kg block initially at rest is pulled to East along a horizontal surface with coefficient of kinetic friction μk=0.15 by a constant horizontal force of 12 N. Find the speed of the block after it has moved 3m.

After creating a question and forming a hypothesis, what is the next step in the scientific method

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.51 s after passing his window. Roger's room is on the second floor, 10 m above the sidewalk.

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?