Celina has a water sample that's contaminated with salt and microorganisms. Which two methods could she use to purify the water?

Both clouds are the same size. Which one is lighter? 10,000 5,000

Suppose you dissolve 4.75 g of another solid (not urea) in 50.0 mL of water. You note that the temperature changes from 25.0 °C to 28.0 °C. Part 1: What is the mass of the solution?

Why does cold water sink?

A truck on the freeway accelerates from a velocity of 12m/s to a velocity of 28 m/s over a distance of 40.0 m. Calculate the acceleration of the truck

A song is playing on a radio. Which of the following best describes the transformation of energy? 1: Electrical energy is changed to sound energy 2: Electrical energy is changed to light energy 3: Sound is changed into electrical energy 4: Sound is

What often happens to light when it travels from one medium to another

60,000 is 100 time as much as

A balloon is expanded to the same volume as that of a human head. Do an order-of-magnitude estimate of the volume of this balloon in cm3.

Which of the following atoms do not usually form bonds

The red LED consists of a white LED covered with a red filter. What does the red filter do?