What is the universe made of? Astronomers face an embarrassing conundrum: they don't know what 95% of the universe is made of

The ball shown below is accelerating at a rate of 10 m/s2. The ball's mass is 5 kg. What is the net force on the ball? F net =? A. 2 N B. 5 N 15 N D. 50 N

8. If a car is going 10 m/s and 4 seconds later it is going 18 m/s, what is its acceleration!

The purpose of the air filter is to

Which best explains the effect of reforestation on land? It allows crops to grow in wide steps along slopes. It turns land slowly into desert. It turns habitable land uninhabitable. It restores trees to areas where they once grew.

Do you think holiday lights are an example of parallel or series bulbs in a circuit? explain why?

A circuit is built based on the circuit diagram shown. A diagram of a closed circuit with a power source on the left labeled 60 V. There are 3 resistors in parallel, separate paths, connected to it labeled 40 Ohms, 50 Ohms and 30 Ohms.

After harvesting their main crops, such as corn and wheat, many farmers plant a second crop called a cover crop. This cover crop grows during the fall and winter and is then plowed over in the spring. What is the main purpose of a cover crop? A.

A light wave is traveling straight up out of the ocean then moves out into the air how do you expect the movement of the light wave to change the light wave will

To verify that this expression for (vf) α has the correct units of velocity, you need to perform some unit analysis. begin by finding the equivalent of a volt in terms of basic si units.

Which of the following best describes transverse waves