These show how something works that can't be seen

Potassium-40 has a half-life of 1.3 billion years. As the potassium-40 isotope decays, it becomes argon. If a rock was formed with 12 g of potassium-40, approximately how long would it take for 75% of the potassium-40 to be replaced by argon?

Which units are used to express kinetic energy

What type of function would you use to sum values in individual pixels in a multi-layered raster data set? Select one: A. local function B. zonal function C. global function D. interpolation

What does mass mean

An elevator is accelerating upwards at 3m/s. It has a mass of 300k. What is the net force (in Newton's) in the y-direction

Which of the following is the most accurate statement concerning the properties of matter? a. they can be written as symbols b. they can be observed and measured c. they cannot be tested or verified d. they change with the amount of matter present

When two sound waves are added together, interference occurs. What type of interference occurs when the overall volume increases? A. Destructive interference B. Deductive interference C. Inductive interference D. Constructive interference

Based on the data table, find the acceleration and then predict the velocity at the time 3.5 seconds.

Explain velocity ratio. Explain and define the efficiency of a machine

How can Ohm's Law relate to a house fire?