Which of these elements is least likely to react with other elements

A. calcium

B. Argon

C. sodium

D. Nitrogen

E. Oxygen

F. Chlorine

Which of the following is the correct SI unit to use in measuring amount of material contained in a solid sphere? A) kilograms B) ounces C) pounds D) tons

Mr. Stephenson drives his car from Dallas to Town X, a distance of 437 km. The trip takes 7.27 hours. What is the average speed of this trip in meters per second (m/s) ? A. 16.7 m/s B. 8.35 m/s C. 60.1 m/s D. 19.7 m/s

If PEs represents the potential energy stored in a spring in kg. m^2 / s2, and x represents the change in spring length from its equilbrium position in m, what is the unitfor the spring constant k in the formula PEs = 1/2 kx^2

Near the surface of Venus, its atmosphere has a pressure fv = 91 times the pressure of Earth's atmosphere, and a particle density of around rhov = 1.05 * 1027 m-3. What is the temperature of Venus' atmosphere (in C) near the surface? g

Which sentence best explains how human population growth affects the production of waste? A. An increase in people would have an unpredictable effect on waste. B. An increase in people would likely result in an increase in waste. C.

A 7 kilogram cat is resting on top of a bookshelf that is 3 meters high. What is the cat's gravitational potential energy relative to the floor?

What two factors determine the speed of sound

Is electric charge a property of just electricity or is charge a property of all atoms?

Which of the gases found in the Earth's atmosphere is an important factor for weather conditions? A) oxygen B) hydrogen C) nitrogen D) water vapor

How do repeater stations improve the quality of a broadcast?