Which of these is a mixture of compounds?

A) sodium (NA) and magnesium (Mg)

B) lithium (Li) and table salt (NaCl)

C) CO2 and CH4

D) hydrogen (H2) and oxygen (O2) combining to make water H2O

A potted plant has a weight of 24.5 N. What is the mass of the potted plant?

The tendency of molecules to move toward areas of lower concentration is called

When light travels from one medium to another (from air to water, for example) it gets bent. This is called which of the following? A. reflection B. refraction C. diffraction D. polarization

The minute hand of a large clock is 0.50 m long. (A) Calculate its linear speed at its tip in meters per second. (0.000873 m/s) (B) Calculate the centripetal acceleration of the tip of the hand. (1.52 x 10-6 m/s2)

One of the most unusual things about the planet Saturn is that?

An elevator has mass 600 kg, not including passengers. the elevator is designed to ascend, at constant speed, a vertical distance of 20.0 m (five floors) in 16.0 s, and it is driven by a motor that can provide up to 40 hp to the elevator.

When two objects collide and stick together, what will happen to their speed, assuming momentum is conserved? They will move at the same velocity as whichever object was fastest initially.

Which planet shows evidence of water erosion?

What do nuclear fission and nuclear fusion have in common?

When plug prongs are connected to the metal case of an appliance, a part that should always be placed next to the case is a a. flat metal washer. b. hexagonal aluminum shoulder. c. steel nut. d. mica washer.