One cubic foot of water can store 312 Btu of thermal energy. On a cold winter day a well-constructed home may require 100,000 Btu of nighttime space heating. What is the volume of water required to store this energy?

The half-life of an anticancer drug is 170 days at 25 oC. Degradation follows the first-order kinetics. When the drug is stored at 5 oC, the degradation rate decreases to one third (1/3) of the rate at 25 oC.

Which one of the following is the weakest electrical conductor? A. a sheet of aluminum foil B. a cup of orange juice C. a metal lunchbox D. a rubber ball

Ultraviolet light from a distant star is traveling at 3.0 * 108 m/s. How long will it take for the light to reach Earth if it must travel 4.0 * 1013 km? 2.7 * 10-2 hours 2.2 * 103 hours 3.7 * 104 hours 1.3 * 105 hours

Which layer is the most dense layer of earth? A. outer core B. mantle C. inner core D. crust

What are the two factors that influence the composition of beach material

Which statement best describes the magnetic properties of a material? Magnetic materials have many spinning, unpaired electrons Paired electrons of magnetic materials can move to other atoms Electrons of magnetic materials are strongly held by

when we examine the structures of the other terrestrial planets in our solar system, we see that their structure is similar to Earth's. Why do you think this is the case?

An ant is crawling along a straight wire, which we shall call the x axis, from A to B to C to D

How does a very heavy object resist sliding sideways when you push hard on it?

A go-cart traveled at 200 meters in 18 seconds. what was the average speed of the go cart?