A sample contains 16.75 g of of the radioisotope U-236 and 50.25 g of its daughter isotope, Th-232. how long did it take for decay to take place of one half-life of U-236 Is 23 million years?

Motion combines the concepts of position change (length) and time. Which of the following combination of units is used to describe the velocity of a moving object? length x time length/time Length/time^2 time/length

Evaluate: (5x + 4y) / 2, which is an expression of a certain experimental procedure. lf x represents the valence of Argon and y represents the summation or valencies of sulphur and Neon

A child walks 35 meters in 7 seconds. calculate the child's speed.

A collision in which kinetic energy is transferred only as kinetic energy from one object to another and is not converted in any other amount to any other form of energy A static friction. B kinetic energy C elastic collision D bouyant force

How far does a car go in 10 seconds at the speed of 44m/s

Which of the following subatomic particles does not have a charge? A.) electron B.) proton C.) neutron D.) positron

How do we use light in space?

What units are used for gravitational potential energy? Write the name, not the symbol.

A 7.5 kg block is placed on a table. If it's bottom surface area is 0.6m2, how much pressure does the block exert on the tabletop? A. 376.5 Pa B. 73.5 Pa C. 226.5 Pa D. 122.5 Pa

A boulder of mass 2000 kg is at the top of a cliff of height 220 m. Determine how fast the boulder will be moving when it strikes the dirt below.