Cobaltâ’60 is a radioactive isotope used to treat cancers of the brain and other tissues. a gamma ray emitted by an atom of this isotope has an energy of 4.70 mev (million electron volts; 1 ev = 1.602 ă— 10â’19 j). what is the frequency (in hz) and the wavelength (in m) of this gamma ray? enter your answers in scientific notation.

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Asmall, positively charged ball is moved close to a large, positively charged ball. which describes how the small ball likely responds when it is released? it will move toward the large ball because like charges repel. it will move toward the large ball because like charges attract. it will move away from the large ball because like charges repel. it will move away from the large ball because like charges attract.

Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine