Which of the following combinations of elements is most likely to produce covalent bonds?

a. hydrogen & helium

b. sodium & magnesium

c. fluorine & bromine

d. aluminum & bromine

What property of two objects determines if the two are in a state of thermal equilibrium? If two objects have the same temperature, they are in thermal equilibrium.

What does Planck's theory state? A. Light has only wave properties B. Light has a dual nature. It has properties of both waves and particles C. Energy radiated by a body is in the form of packets called quanta D.

What happens when the tempature of an object increases? The objects particles move faster The number of objects particles increases The objects particles stop moving The objects particles move closer together

Which statements are true about the flow of blood in the body? Check all that apply.

A box weighing 4.0 N is lifted 3.0 meters. How much work is done on the box? 0.0 J 1.0 J 7.0 J 12 J

If an astronomical light source were moving toward us, then what would be observed? (a) a blue shift (b) a shift toward longer wavelengths (c) a shift toward lower frequencies (d) a sonic boom

How much work must you do to push a 12 kg block of steel across a steel table at a steady speed of 1.3 m/s for 7.6 s? the coefficient of kinetic friction for steel on steel is 0.60?

An Archer needs to hit a bull's-eye On Target at eye level of 60 feet away is the Archer fires the arrow from the eye level with a speed of 47 ft/s at an angle of 25 degrees above the horizontal, will the arrow hit the target

What type of wave is a sound wave A. transverse wave B. longitudinal wave C. light wave D. elctromatic wave

Na+/k+-atpase is considered to be an electrogenic pump because