Physics, 29.05.2020 21:58, ellenaschool
A 1000.-kilogram roller coaster goes down a hill that is 90. meters tall. Its speed at the bottom is 40. m/s.
A. What is the efficiency of the roller coaster? Assume it starts from rest at the top of the hill.
B. What do you think happens to the “lost” energy?
C. Use the concepts of energy and efficiency to explain why the first hill on a roller coaster is the tallest.
Answers: 1
Physics, 22.06.2019 16:00, Andrebutrus
The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?
Answers: 3
Physics, 23.06.2019 00:20, DwayneLeonard618
What efficiency of a car's engine when heat input is 200,000 joules and waste heat is 150,000 joules? a. 75% b. 35% c. 25% d. 85%
Answers: 2
Physics, 23.06.2019 01:30, missfuture2020p5umxt
Relative to the ground below, how many joules of potential energy does a 1000-kg boulder have at the top of a 5-m ledge?
Answers: 1
A 1000.-kilogram roller coaster goes down a hill that is 90. meters tall. Its speed at the bottom is...
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