Why is it dangerous to probe inside a television set even hours after it has been unplugged?
What will be an ideal response?
Capacitors are charged to large potentials and store considerable charge within the TV sets and they still hold charge long after being disconnected from the power supply.
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Linus claims that the added gravitational force of neutrons holds the particles in a nucleus together. Linnea says that they stick together because they lose their electric charge when they form a nucleus. Which one, if either, is correct, and why?
a. Linus, because more particles exert gravitational forces on one another than exert electromagnetic forces. b. Linus, because the numerical magnitude of G/ke is 7.42 × 10^?21. c. Linnea, because the numerical magnitude of G/ke is 7.42 × 10^?21. d. Both, because electric charge is lost and then gravity holds the nucleus together. e. Neither, because gravity is not lost, and the numerical magnitude of ke/G is 1.35 × 10^20.
Metabolism is a term that describes the
A) breaking down of complex organic molecules by bacteria B) rate at which molecules travel across cell membranes C) chemical processes that occur inside cells D) rate of cell division of bacteria
A spaceship is moving past us at a speed close to the speed of light. What would passengers on the spaceship conclude about our clocks?
A) Time is the same for everyone. B) They would conclude that our clocks going faster than theirs. C) They would conclude that our clocks going slower than theirs. D) They would conclude that our clocks going at the same rate as theirs. E) They can't see our clocks, but we can see theirs.
Suzie Skydiver, who weighs 500 N, reaches terminal velocity of 90 km/h. The air resistance on Suzie is then
A) 90 N. B) 250 N. C) 410 N. D) 500 N. E) none of the above