Scientists study the life history of stars by examining what trait of stars? A. size B. energy output C. color D. all of these

In the Gizmo, what light intensity and CO2 level do you think will maximize the rate of photosynthesis?

If you were to cut a small permanent bar magnet in half, A. one piece would be a magnetic north pole and the other piece would be a south pole. B. neither piece would be magnetic. C.

Which simple machines make up a wheelbarrow?

In the inclined plane the objects that are thrown from a more inclined place go faster?

In 2007, Michael Carter (U. S.) set a world record in the shot put with a throw of 24.77 m. What was the initial speed of the shot if he released it at a height of 2.10 m and threw it at an angle of 38.0o above the horizontal

A 85-kg astronaut (including spacesuit and equipment) is floating at rest a distance of 11 m from the spaceship when she runs out of oxygen and fuel to power her back to the spaceship. She removes her oxygen tank (3.

Find the specific gravity of the rose quartz. Specific gravity = density of of water. What are the units for specific gravity?

A ball of mass 5.0kg is lifted off the floor a distance of 1.7m. 1. What is the change in the gravitational potential energy of the ball? 2. Now you release the ball from rest, and it falls to the floor.

What is the device to break a circuit called?

A 3 column table with 5 rows labeled table A. The first column is labeled voltage in volts with entries 1.0, 5.0, 10, 20, 50. The second column is labeled current: calculated in amps with no entries.