When electric current is flowing in a metal, the electrons are movinga. at nearly the speed of light. b. at the speed of sound in air. c. at the speed of sound in the metal. d. at none of the above speeds. e. at the speed of light.

Assume you are a fish in fresh water. you get up every morning and weigh yourself on your scales, and find you weigh 0.420 n. you, being a boxfish, are a box measuring 4.174 cm per side. you see a poor, hungry fisherman, and decide to be his dinner.

A 100 W lightbulb is brighter than a 60 W lightbulb when both operate at the same voltage of 120 V. Part A If, instead, they were both operated at the same current of 0.5 A, which would be brighter? Select the correct answer and explanation.

How can two machines appear identical and yet not have the same actual mechanical advantage

Which technology allows doctors to evaluate whether an athlete has broken a bone?

A carbon rod with a radius of 2.1 mm is used to make a resistor. The resistivity of this material is 3.2 * 10-5 Ω · m. What length of the carbon rod should be used to make a 13.7 Ω resistor?

Which phases of matter do molecules have the lowest amount of energy?

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2

How does surface roughness affect friction

Why does it hurt your hands when you carry heavy shopping in carrier bags?

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?