Car has mass 2000 kg goes on the inside of a vertical loop with height 20 m. if the car survives the loop, then what is the minimum speed needed at the top of the loop?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

The diagram shows a boulder rolling down a hill into a valley and then up the opposite hill. at which position does the boulder have the greatest kinetic energy? ab c d

Astronomers studying the planet of rhombus have detected sedimentary rock on its surface. one astronomer wonders if material in this sedimentary rock used to be in igneous rock deep in rhombus’s interior. can igneous rock become sedimentary rock? explain your answer.