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?

During what period of time does the moon appear in the sky on a new-moon day? a. 12 hours during the day b. 12 hours during the night c. the first six hours in the day and the next six hours in the night d.

What is the result of (6.2 * 104) x (3.3 * 102) expressed in scientific notation? 2.0 * 108 2.0 * 107 2.0 * 106 2.0 * 102

What is pitch measured in?

During football practice, a football is kicked with a speed of 22 m/s at an angle of 60.0° relative to the positive x direction.

Find the work w1 done on the block by the force of magnitude f1 = 95.0 n as the block moves from xi = - 5.00 cm to xf = 4.00 cm.

What does the second law of thermodynamics say about entropy apex?

If an oscillation is moving up and down in the y-axis and the wave is traveling to the right in the x-axis, what type of wave is this?

What can result if an earthquake causes a sudden vertical change in the sea floor? A. a tsunami B. liquefaction C. soil creep D. sheet erosion

Suppose gene A on the left chromosome is damaged and no longer functions. what form of the trait would show? Why?

I'm completely lost in physics, the Kinematics and dynamics units ... My exam is coming up ... If a biker travelling at 6.4m/s sees biker B 34m ahead on the road travelling 4.7m/s. How far will biker B get before biker A catches him?