Which of the following is an element?

a. salt

b. iron

c. nylon

d. sand

Which of the following correctly compares the uses of bar graphs versus pie charts? Bar graphs show patterns in data with variables that change over time; whereas, pie charts show data as parts out of a whole (such as out of 100%).

During a 0.001 s interval while it is between the plates, the change of the momentum of the electron Δp with arrow is kg m/s. What is the electric field between the plates?

Which of the following statements is true? A. Pressure flattened the solar nebula into a disk and as it contracted its rotation rate decreased. B. Pressure flattened the solar nebula into a disk and as it contracted its rotation rate increased. C.

Substance that does not contain any free ions and will not be an electrically conductive medium is what?

Which of the following statements is true? All work gains some energy as heat. Radiation is the transfer of heat in solids. An insulator speeds up the transfer of heat. All moving objects experience friction.

Cells are known as the foundation of all life. How have these small structures changed our planet?

What does it mean to dissolve something

Why is a neutral object attracted to a charged object?

The international space station revolves around earths surface. which of the following statement s is true? a. it has no energy because it is stationary b. it has potential energy, but does not have kinetic energy c.

A sports car moving at constant speed travels 115m in 5.3 s. If it then brakes and comes to a stop in 4.0 s, what is it's acceleration? Express the answer in terms of g's, where g = 9.