When light bends as it enters a different medium the process is known as what?

How do we know the universe is a closed system?

What is the total number of pounds of carbon dioxide that 2 trees remove from the air each year?

A food web illustrates a snake eating a rat. What is the role of the snake in the food web? A. Decomposer B. Secondary consumer C. Primary consumer D. Producer

If you walk 15m west and 7m east. what is your displacement?

In a pendulum experiment the pendulum moves from one side to the other side in 0.6 second. Calculate the period of the pendulum.

Which of the following types of boundaries is most likely to result in a subduction zone? a. divergent b. convergent c. transform d. all of the above

in 1 second, 2.68x10^16 Na ions arrived at the negative electrode and 3.92x10^16 Cl - ions arrive at the positive electrode what is the current passing through the electrodes?

All of the following involve waves of electromagnetic energy except A. watching videos on a computer screen B. radios receiving signals through air C. the rumble of thunder during a storm D. sunlight shining on a plant leaf

An unknown fluid has a specific gravity of 0.750. What is the volume of 22.5 kg of this fluid? A. 10 L B. 20 L C. 30 L D. 40 L

The IMA of a lever can be increased by decreasing the length between the applied effort and the pivot.