An cannon shoots a shell at a hot air balloon located H = 4 km directly above it. What is the minimum required acceleration of the shell inside the barrel if the length of the barrel is l = 1m? Assume that the motion inside the barrel is with constant acceleration.

Explain how plate tectonics have changed earth’s surface over time. include the role of plate tectonics in the creation of landforms.

The two required components for a generator are

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.