4. a jet pilot takes his aircraft in a vertical loop. a) if the jet is moving at a speed of 840 km/h at the
lowest point of the loop, determine the minimum radius of the circle so that the centripetal
acceleration at the lowest point does not exceed 6.0 g's. b) calculate the 78 kg pilot's effective
weight (the force with which the seat pushes up on him) at the bottom of the circle, and c) at the top
of the circle (assume the same speed).

Carbon-14 is a radioactive element that undergoes beta decay. which force is responsible for allowing carbon-14 to become stable? electromagnetic gravitational weak nuclear strong nuclear

The mass of a bowling ball is 10 kg and the mass of a ping pong ball is 0.015 kg. if the two objects are 5 meters apart, what is the gravitational force ?

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.