Let's design a roller coaster. It should consist of a long ramp leading into a loop. The loop should have a radius r of 7.2 m. The cars have a mass M of 211 kg. Assuming that friction can be neglected here, what should be the minimum height h of the ramp (in m) with respect to the bottom of the loop so that the cars don't fall off the track at the top of the loop

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz