The 20 or so minerals that make up most of the rocks of earth's crust are know as what

Which of the following items is most sensitive to increased acidity in the environment? concrete buildings glass windows railroad tracks paved roads

Time in years How many grams of cobalt-60 will remain after two half-lives? 1

A particle with a charge of 5.13 μC has a velocity of 8.64 x106 m/s in a direction perpendicular to a magnetic fieldof 1.99 x 10-4 T. The magnitudeof the force on this particle is 1 Newtons?

Ms. Sullivan's class is investigating simple machines. Today they are using a crowbar to lift a heavy desk. Most students can lift the desk with the crowbar, even though they couldn't lift it with their bare hands.

Identify a wave that speeds up when it passes from air to water as well as one that slows down

You did 150 joules of work lifting a 120 - N backpack. how high did you lift the backpack? how much did the backpack weigh in pounds

After the layers of sediment are deposited in one place, they are

A rectangular gasoline tank can hold 50.0 kg of gasoline when full. What is the depth of the tank if it is 0.500-m wide by 0.900-m long, given that the density of gasoline is 6.8 x 102 kg/m3

Which statement best describes the kinetic theory of matter? Matter is made up of compounds that are in constant motion and have energy. Matter is made up of particles that seldom move and do not possess energy.

Why can we see our breath on a cold winter day