A bear scratches his claws on a big pine tree. Does the bear do work on the tree? why or why not? (btw it has to do with physics) ITS NOT A GENERAL QUESTION.

Which of the following is an example of units for speed

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.