Arollercoaster starts at a height of 30m above the ground. at the bottom of a loop. the rollercoaster is at a height of 10m. approximately, how much gravitational potential energy is lost by a 75kg rider?
a. 19.6 joules. eliminate.
b. 1470 joules.
c. 14,700 joules
d. 22,050 joules

Afrequency generator sends a 550 hz sound wave through both water and ice. what is the difference in wavelength between the wave produced in ice and the wave produced in water?

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?