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?

What's inside a nucleus and makes RNA to make proteins

Which one of the following is an example of a weak acid? O A. Sodium hydroxide O B. Magnesium hydroxide O C. Hydrochloric acid O D. Acetic acid

The surface temperature of venus is so high because

Define the si units for length mass time and temperature

In the figure, a radar station detects an airplane approaching directly from the east. At first observation, the airplane is at distance d1 = 320 m from the station and at angle θ1 = 31° above the horizon.

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?

Unless otherwise posted, what is the speed limit in a school zone? florida

If you put in 10 J of work to push 1 c of charge against and electric field what will be its voltage with respect to its starting position? when released, what will be it's kinetic energy if it flies past it's starting position?

The process of changing the energy of a system by means of force. Force * Diatance

A gnat takes off from one end of a pencil and flies around erratically for 18.6 seconds before landing on the other end of the same pencil. If the gnat flew a total distance of 7.15 meters, and the pencil is 6.