Use Newton’s thought experiment on the motion of satellites to solve the following.
1)Calculate the speed that a satellite shot from a cannon must have to orbit Earth 150 km above its surface.(rE = 6.38×106 m)

2)How long, in seconds and minutes, would it take for the satellite to complete one orbit and return to the cannon?

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat