A person stands 6.00 m from a speaker and 8.00 m from an identical speaker. What is the frequency of the second (n=2) interference minimum (destructive) ? (unit=Hz) ?

a) A piston expands against an external pressure of 2.35 atmospheres (atm). If the initial volume is 0.455 L and the final volume is 1.318 L, then how much work (in J) is done? Assume adiabatic conditions.

Why doesn't this aquarium represent a closed system? A. because light, heat, and air can enter and exit B. because it has plastic plants C. because the water is cold D. because there is more than one kind of fishuired.

Which statement is correct about an element's identifying spectrum? a) The light reflected off an element produces a unique identifying spectrum. b) The light absorbed by an element produces a unique identifying spectrum.

A 3.50kg box is moving to the right with speed 8.00m/s on a horizontal, frictionless surface. At t = 0 a horizontal force is applied to the box. The force is directed to the left and has magnitude F (t) = (6.

Rearrange the momentum equation to solve for speed. Show all work.

A scientist has found a new drug that appears to provide weight loss in humans without dieting. The scientist has tested the drug on thousands of people and has found a few side effects.

If there are 20 Earthworms in a garden that covers 5 square meters, what is the population density of the earthworms? A. 20 Earthworms B. 4 C. 100 Earthworms per square meter D. 4 Earthworms per square meter

How are AC and DC generators different? In AC generators, commutators produce alternating current. In AC generators, no commutators or slip rings are used. In DC generators, slip rings produce direct current.

A 30.0-kg object experiences a drag force due to air resistance with a magnitude proportional to the square of its speed. The object falls with an acceleration of 4.00 m/s2 downward when it is falling downward at 70.0 m/s.

If a tank contains water 4 m deep, what is the pressure at the bottom of the tank? (Neglect the atmospheric pressure.)