Biotic factors are the blank and blank part of the ecosystem

What is the maximum frequency a human eardrum is able to perceive?

A 24-volt source is required to furnish 48 watts to a parallel circuit consisting of four resistors of equal value. What is the voltage drop across each resistor?

If 12 atoms of hydrogen enter into a chemical reaction how many atoms of hydrogen must come out of this reaction

Which arrangement in relative size is correct? (< sign means 'smaller than') proton < electron < neutron < atomic nucleus atomic nucleus < proton < electron < atom proton < neutron < atomic nucleus < electron electron < neutron < atomic nucleus <

The 480 g bar is rotating as shown what is the angular momentum of the bar about the axle?

Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planers in orbit around the Sun.

What wave-like property of light causes it to bend when encountering an opening? A. Reflection B. all the above c. Refraction d. none of the above e. diffraction

Which of the following statements describe sliding friction? Select all that apply. 1.) a force that causes an object to increase speed 2.) a force in which one of the objects involved must be a liquid or a gas 3.

What do a broken rode and a volcano eruption have in common

What is the input of energy for a device that provides 50 units of useful energy and has an efficiency of 0.55?