Which of the following is a diatomic molecule?

Ca2-

N2

KCl

MgCl2

Which of the following is the best definition of a base? Bases are substances that donate protons, Bases are substances that accept electrons. Bases are any substances without hydroxide ions. Bases are substances that release hydroxide ions.

An 18-year-old runner can complete a 10.0-km course with an average speed of 4.39 m/s. A 50 - year-old runner can cover the same distance with an average speed of 4.27 m/s.

How is Einstein's equation E = mc^2 used in medicine?

What is the magnitude of the force that lifts a 3-kilogram object straight upwards? A. 3.0 N B. 3.3 N C. 9.8 N D. 29.4 N

If an individual is right-handed, under most circumstances it would be safe to assume that their right arm is stronger and more fatigue resistant, since it is probably used to carry out a majority of daily tasks. a. True b. False

When NASA's Skylab reentered the Earth's atmosphere on July 11, 1979, it broke into a myriad of pieces. One of the largest fragments was a 1770-kg lead-lined film vault, and it landed with an estimated speed of 120 m/s.?

A spring gains 2.34 joules of elastic potential energy as it is compressed 0.250 meter from its equilibrium position. What is the spring constant of this spring? (1) 9.36 N/m (3) 37.4 N/m (2) 18.7 N/m (4) 74.9 N/m

Form hypothesis: Where do you think we humans get energy?

The distance from home plate to the pitchers mound is 18.5 meters. For a pitcher capable of throwing at 3.85m/s (86mi/hr), how much time elapses between the release of the ball and the ball passing home plate?

A squirrel sitting on the ground starts to run with an acceleration of 5.1 m/s 2. How fast is the squirrel going after 0.25 seconds? A. 20.4 m/s B. 1.28 m/s C. 0.49 m/s D. 3.1 m/s