A radioactive isotope of the element potassium decays to produce argon. If the ratio of argon to potassium is found to be 31:1, how many half-lives have occurred?

A car is moving 18 m/s to the eat. If it takes the car 5 seconds to reach a velocity of 19 m/s to the east, what is its acceleration? A. 0.2 m/s^2 west B. 0.2 m/s^2 east C. 1 m/s^2 east D. 5 m/s^2 east

Which is caused when constructive interference occurs in sound waves? a. louder beats b. no disturbance c. softer noises d. no sounds

What is the kinetic energy of a 1200 kg object that is moving at a speed of 24 m/s?

What are the chemical properties of aspirin?

Which of the following best illustrates a natural process acting as a constructive force?

What is the main driver of the water cycle

What two types of evidence are used to classify orgianisms?

What is the name of the fine soil particles deposited by rivers?

A ball of mass 200 g rolls along the ground at a speed of 5.2m/s. calculate the kinetic energy of the ball. Give answer to one decimal place.

A light bulb that is connected to a 120 V source drawers 1.7 A. What is the resistance of the light bulb? A. 14 B. 71 C. 200 D. 0.014 E. 0.0