What are the types of heat creating energy

A meteorite contains 0.17 g of nickel-59, a radioisotope that decays to form cobalt-59. The meteorite also contains 5.27 g of cobalt-59. How many nickel-59 half-lives have passed since the meteorite formed?

What determines what element an atom is?

Name three states in which matter can be found

What occurs when an object vibrates in response to sound waves of a certain frequency?

A charge of 6.4 * 10-7 C experiences an electric force of 1.8 * 10-1 N. What is the electric field strength? 1.1 * 10-7 N/C 3.6 * 10-6 N/C 8.2 * 100 N/C 2.8 * 105 N/C

A 0.8kg object accelerate at a rate of4 m/s2. What is the net force acting on a object

Which of the following is the best definition of an isotope? A. elements of the same kind with different numbers of neutrons B. elements of the same kind that have lost electrons C. elements of the same kind that have different electrical charges

Two cars approach each other; both cars are moving westward, one at 85 km/h, the other at 54 km/h. what is the magnitude of the velocity of the first car relative to (in the frame of reference of) the second car? answer in units of km/h.

What usually causes high concentration of minerals to form

The courtroom role that possesses the most discretion is?