A space station was established far from the gravitational field of Earth. Extended stays in zero gravity are not healthy for
human beings. Thus, for the comfort of the astronauts, the
station is rotated so that the astronauts feel there is an internal
gravity. The rotation speed is such that the apparent
acceleration of gravity is 9.8 m/s2. The direction of rotation is
counter-clockwise. If the radius of the station is 80 m. What is
its rotational speed, v?

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?