When demand for electric power is high, power company sometimes reduced the voltage, thereby producing a "brown-out." What is being saved?

A copper block with a mass of 300 grams is cooled to 77K by being immersed in liquid nitrogen. The block is then placed in a Styrofoam cup containing some water that is initially at + 50.0°C.

Which explains upwelling in the oceans?

H2O Cl2 NH3 What do all of these compounds have in common? A) They are all ionic. B) They are all covalent. C) They all are positively charged. D) They all are negatively charged.

A positively charged rod is brought near one end of an uncharged metal bar. the end of the metal bar farthest from the charged rod will be charged

If two stars are the same distance from us and they both appear to be the same brightness, then they both have the same apparent magnitude have the same absolute magnitude both a and b

1. Calculate the total resistance for a 650 ohm, a 350 ohm, and a 1000 ohm resistor connected in series.

What is the study of motion of objects, and related concepts of force and energy

Sliding friction definition

How much would a 100kg man weigh on the surface of the sun where the acceleration is 274 m/s

How much current is in a circuit that includes a 9 - volt battery and a bulb with a resistance of 12 ohms?