What term defines the specific amount of time required for half of a radioactive substance to become stable?

a. half-life

b. decay phase

c. decay period

d. a gamma second

Match the technology that uses radio waves to the field in which it is used

A force acts on an object and moves it a certain distance

A car weighing 800 kg starts from rest due to the force of the engine, which evenly increases so that after the first second it has a value of 325 N. Calculate what speed it will havethe car after 10 s of movement and what path it took in that time.

The surface tension of water is 7.28 ✕ 10-2 J/m2 at 20°C. Predict whether the surface tension of octane would be higher or lower than that of water at the same temperature. Explain your answer.

Which of the following is an example of energy changing from one form to another? a rock a fire a desk a pen

The football player running toward the goal line has A. Potential energy B. Chemical energy C. Kinetic energy D. Elastic potential energy

If the density of an object is 30 g/cm3 and its volume is 10 cm3, what is its mass in grams?

Explain how atoms are aligned in a magnet in terms of the North and South poles.

Which of the following has the largest gravitational potential energy A. a 10kg dog running down the street at 30mph B. a tightrope walker slowly crossing niagara falls C. a 0.02kg bullet moving down the barrel at 800mph D.

Why does the speed of an object change when a force acts on it?