If the half - life of a sample of a radioactive substance is 30 seconds, how much would be left after 60 seconds?

In which scenario is gravitational potential energy present? A rabbit looks out of a hole in the ground. A squirrel runs up the trunk of a tree. A deer runs across a grassy field. A cat pins a mouse to the ground.

Sound cannot travel through a vacuum. Explain why.

Why does Energy appear continuous in everyday life?

Which is an action that can cause an object to move or change its state of motion? energy force equilibrium inertia

Describe how the properties of water contribute to two of the following. Transpiration thermoregulation in endotherms plasma membrane structure

What is the total number of atoms in the following formula? CaBr2 4 3 2 1

Object A with a mass of 500 kilograms hits stationary object B with a mass of 920 kilograms. If the collision is elastic, what happens after the collision? A) Both object A and object B move forward but with different velocities.

A young man walks daily through a gridded city section to visit his girlfriend, who lives m blocks East and nblocks North of where the young man resides.

Aliens from planet Moby have three alleles for skin color: R (red) W (white) and B (Blue). If all of these alleles are codominant and aliens on planet moby can only inherit two alleles for a gene, what are the six possible genotypes for skin color

The difference between two numbers is 15. When twice the smaller number is subtracted from three times the larger number, the difference is 58. What is the larger number?