What is the frequency of a wave if its period is 0.25 seconds?

A 588 mother sits on one side of a seesaw, 2.20m away from the pivot. one of her two children sits 2.00m from the pivot on the other side of the seesaw.

What would the temperature of 50g of 20 degree Celsius water mixed with 80g of 40 degree Celsius water?

You shine a light in a dark tunnel towards your friend the distance between the two of you are 25m how long does it take for the light to cover this distance

Jeremy pulled on the spring scale below. how could he decrease the force needed?

Write out an example of a chemical reaction

Vitellium (Vi) has the following composition:Vi-188: 187.9122 amu; 10.861%Vi-191: 190.9047 amu; 12.428%Vi-193: 192.8938 amu; 76.711%Based on this data, what can you predict about the average atomic mass of vitellium?

if you have an experimental setup which has three unknowns, how many linearly independent equations do you need to determine the unknowns to find one unique solution?

What is a sedimentary rock consisting of material that was precipitated from water

The path of a beam of light from the sun to your eye when you are wearing sunglasses

The element that is most abundant in earth is