Which group of people is credited for first discovering magnets?

A perpetual motion machine can never be built because it is not possible to eliminate A) Momentum B) Inertia C) Elasticity D) Friction

A particle moves along a circle with radius R, so that the tangential component of its acceleration is constant. At t = 0 the velocity of the particle was equal to zero. Find (a) the normal component an of the acceleration as function of time.

What are glacial grooves?

What is the relationship between wavelength frequency and wave speed

At t = 0 a car has a speed of 30 m/s. At t = 6 s, its speed is 14 m/s. What is its average acceleration during this time interval?

There is a current of 0.99 a through a light bulb when its connected to a 9.7 v battery what is the resistance of the light bulb

After school, several students skateboard at the nearby park. Your best friend, Erwin, is a good skateboarder and happens to fall when attempting a fancy trick. After falling, Erwin gets back up and starts repeating the trick over and over again.

A Hall probe serves to measure magnetic field strength. Such a probe consists of a poor conductor 0.103 mm thick, whose charge-carrier density is 1.11 * 1025 m-3. When a 2.89-A current flows through the probe, the Hall voltage is measured to be 3.

What is the mass of a basketball that is shot with 12N of force at an acceleration of 4m/s2?

What is transferred by electromagnetic waves?