A 1000 watt microwave oven takes 90 seconds to heat a bowl of soup. How many joules of energy does it use?

A forest fire makes a loud roaring sound. The explosive processes that release energy from the Sun occur at a much higher temperature. Why don't you hear a roaring sound from the sun?

How do the main sequence stages of a 1 solar mass star and a 15 solar mass star differ?

A solution is oversaturated with solute. Which could be done to decrease the oversaturation? A. dilute the solution B. add more solute C. cool the solution D. add a different solute

This can best be explained due to A) density. B) friction. C) gravity. Eliminate D) inertia.

Why does one atom have a partial negative charge in a polar covalent bond? That atom has a greater attraction for electrons. That atom has a lesser attraction for electrons. That atom is more likely to form ionic bonds.

Positively-charged particles consisting of two protons and two neutrons emitted by radioactive materials. True or False

A package of aluminum foil is 59.3 yd long, 13 in. wide, and 0.00040 in. thick. If aluminum has a density of 2.70 g/cm3, what is the mass, in grams, of the foil?

A teacher pushed a 10-kg desk across a floor for a distance of 5 m she exerted a horizontal force of 20 N how much work is done

Carbon and oxygen, both nonmetals, bond to form a compound. What is the name of the carbon compound with one carbon and two oxygens? A) carbon oxide B) carbon dioxide C) carbon dioxygen D) monocarbon dioxide

Salt water has greater density than fresh water. A boat floats in both fresh water and in salt 12) water. Where is the buoyant force greater on the boat?