When the biker is at the top of the ramp, he has a speed of 10 m/s at the height of 25 m. The bike and person have a total mass of 100 kg.
He speeds into the spring at the end of the ramp, which slows him to
a stop. The total initial energy is
J.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

In the first law of thermodynamics, triangle e=q-w, what does q stand for