Two blocks connected by a cord passing over a small, frictionless pulley rest on frictionless planes (fig. P5. 90). (a) which way will the system move when the blocks are released from rest? (b) what is the acceleration of the blocks? (c) what is the tension in the cord?.

Why do you think electric energy for households is generally supplied by power plants instead of by an electric generator at home.

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

These two squirrels live in the same ecosystem. what type of interaction do the images represent? a. direct competition b. mutualism c. interference competition d. symbiotic e. indirect competition