Sheila (mass=60.1 kg) is riding the Demon roller coaster ride. The turning radius of a loop of the ride is 15.9 m. The coaster makes the loop 3.00 times in 21.5 seconds before exiting that part of the ride. What is the centripetal acceleration of Sheila while making the loops? What is the centripetal force active on Sheila while making the loops?

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?

Which of the following should not be included in a great summary? a. blaming your lab partner b. new questions your experiment has generated c. your prediction d. your investigation plan