The atomic number of an element represents the number of:

neutrons

protons

electrons

protons and neutrons

A car is traveling with a constant speed of 30.0 m/s when the driver suddenly applies the brakes, causing the car to slow down with a constant acceleration. The car comes to a stop in a distance of 120 m.

Which of the following takes place in the combustion chamber of a gas turbine engine? A. A glow plug is used to add enough heat to the chamber for combustion to occur. B. Gaseous combustion products are cooled to a desired temperature. C.

Putting a marshmallow directly in the fire A. Conduction B. Convention C. Radiation

Ships A and B leave the same port. Ship A sails at 20 knots (nautical miles per hour) and ship B sails south at 15 knots. At what rate is the distance between them changing at 2 pm if: a. A and B both leave at noon. b.

The intensity of a sound describes a. its speed. b. its loudness at a particular distance. c. the distance and medium through which it travels. d. the medium through which it travels.

Radar, the first link in the cosmic distance chain, is used to establish the baseline distance necessary for the second link, parallax. What baseline distance must we know before we can measure parallax?

What types of areas are more prone to floods?

would the phases of the moon be affected if the moon didn't make one rotation for each revolution of earth?

What kinetic energy has 1 tone car traveling at 15 m/s

Ceres is a dwarf planet located in the main asteroid belt.