What are sources of energy loss in a roller coaster? (Other than friction)

Knowing what you do about the circumstances surrounding Sara's speech, which of the following options would NOT provide Sara's argument with validity nor remain relevant to her argument? A.

in Hooke's law F spring equals K triangle X what does the triangle X stand for

What is the number of significant digits in the measurement 104.100 m?

What 2 planets have the shortest distance between them

An engine has a hot-reservoir temperature of 980 K and a cold-reservoir temperature of 570 K. The engine operates at three-fifths maximum efficiency. What is the efficiency of the engine?

If you push on a wall of a building what will happen

A conductor, with outer surface labelled a, contains a cavity, inner surface b. In this cavity there is a conducting sphere of radius r, and surface c. The sphere carries a charge of 1 C, while the conductor a charge of 2 C.

A spring (k = 790 N/m) has a length of 48 cm when zero net force is applied to it. What will its length be when 230 N of force is applied to stretch it? Question 3 options: 3.4 m 0.77 m 3.9 m 0.29 m

Inert gas used to make bright city lights True or False

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?