Two 75 kg astronauts are 5.0 m apart. What is the gravitational force between
them?

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

What is magnetic flux? explain faraday's law of induction.

The heliocentric and the geocentric models of the solar system included these central principles