Describe how water may be treated before people use it

Which of the following is true about Earth science? A. There is no explanation for what occurs. B. Observations and experiments cannot explain natural events. C. Things in nature randomly occur. D.

Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a wrench from 5.00 m above the ground and measure that it hits the ground 0.804 s later.

A sample of gas with a volume of 750 mL exerts a pressure of 98 kPa at 30◦C. What pressure will the sample exert when it is compressed to 250 mL and cooled to - 25◦C? 1. 26.7 kPa 2. 359 kPa 3. 353 kPa 4. 241 kPa 5. 39.9 kPa

We can learn the most about where and how an igneous rock formed by studying its

Replace the wire. now remove one of the wires touching the voltage source. What happened?

Two kids are on a merry-go-round that is turning at a constant rate. ariel is near the outer edge, and bob is closer to the center. ariel has answer (smaller, the same, or greater angular speed?

Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury. Name three uses for mercury.

Ten seconds after starting from rest, a car is moving at 40 m/s. what is the car's acceleration in meters per second per second?

A student builds a simple circuit and a magnet under one of the circuit wires. When the switch is closed charges flow int the circuit and the wire moves

Cite an example in which a force is exerted on an object without doing work on the object