Which of the following systems has potential energy only?

Select one:

a car screeching to a halt

an airplane flying above

a stone falling off a cliff

a bird sitting on a branch

Competition between two species occurs when 1. Mold grows on a tree that has fallen in the forest 2. Chipmunks and squirrels eat sunflower seeds in a garden 3. A crow feeds on the remains of a rabbit killed on the road 4.

The molecular mass of the compound is 132 amu. What is the molecular formula?

How many moles of CO2 are present in 0.220g?

Calculate the theoretical yield of hydrogen gas (in L) at 295 K for a reaction of 1.50 g magnesium with excess hydrochloric acid. If 1.205 L of gas is produced, what is the percent yield of the reaction?

What is the volume, in liters, of 7.8 x 10^25 atoms of krypton at STP?

Is the animal farm poor true or false

Which list correctly shows carbohydrates in size from smallest to largest?

Metallic behavior is generally associated with elements with partially filled p orbitals. elements with unpaired electrons. elements with small atomic radii. elements with very negative electron affinities. elements with low ionization energies.

Does cos have a dipole moment? choose the answer that best explains the reason for your choice.

How do the fracture toughness values compare between ceramics, polymers and metals?