A car accelerates from 25ms to 40ms in 5 seconds. What is the average velocity?

A thin hoop is supported in a vertical plane by a nail. What should the radius of the hoop be in order for it to have a period of oscillation of 1.00 s

A rocking horse is a compound machine true or false

Why are concepts in physics described in formulas?

Sound travels through air at 343 m/s, and through fresh water at 1482 m/s. A kid jumps into a lake, which makes a sound wave in air and in water. After 2.25 s, how much farther has the sound wave traveled in water than in air? (Unit = m)

Describe the energy transformations in an electric light bulb.

A bicycle racer sprints near the end of a race to clinch a victory. The racer has an initial velocity of 12.1 m/s and accelerates at the rate of 0.350 m/s2 for 6.07 s. What is his final velocity?

The current in a wire increases from 5 A to 10 A, what happens to its magnetic field? The field is twice as strong the distance of a charged particle from a wire changes from 10 cm to 20 cm, what happens to its magnetic field?

At a constant pressure and a temperature of 280 K, the gas in a cylinder has a volume of 10.0 liters. If the volume of the gas is increased to 20.0 liters, what is the new temperature? 2800 K 28 K 140 K 560 K

what must be the distance between source of sound and mountain to give an echo in 5 seconds?, (speed of sound at 0°c=33m/sec

What is the speed of a 50 g rock if its de Broglie wavelength is 3.32 x 10?