A student measures the frequency of a wave as 2 waves/second, and the wavelength as 40 cm/wave. Use the velocity equation (v = f * λ) to calculate the speed of the wave. Show your work and include units.

Evaluate - if you put a scale in an elevator and weigh yourself as you ascend and the descend, does the scale have the same reading in both instances?

Which of the following is not a sign that a chemical change has occurred? -Change in energy -Change in mass -formation of precipitate -Change in color

Given the equation 4Al + 3O2 - -> 2Al2O3 if 325 grams of Al2O3 are to be formed, determine the mass of aluminum that must be reacted with excess oxygen. Question 4 options: 101.77g Al 26.9g Al 171.80g Al 6.38g Al

What distinguishes two different isotopes of an element is the number of neutrons contained in their nucleus.

A potassium atom (atomic number 19) and a bromine atom (atomic number 35) can form a chemical bond through a transfer of one electron. The potassium ion that forms has 18 electrons. What best describes the bromide ion that forms?

What are the common elements in a canyon?

How many carbons atoms are in propane?

This type of formula indicates the kind, number, arrangement, and bonds but not the unshared pairs of the atoms in a molecule.

What does the water inside the jar represent

What is solubility? 1) solubility is how much solute will precipitate out of solvent 2) solubility is how much solvent will dissolve in solute 3) solubility is how much solid only will dissolve in liquid only