What is a gamma ray?

A. Electromagnetic radiation
B. A positively charged positron
C. Two protons and two neutrons
D. A negatively charged electron
SUBMIT

penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei.

Explanation:

SO A: ELECTROMAGNETIC RADIATION

A. Electromagnetic radiation

Explanation:

Gamma rays is electromagnetic radiation that come from the radioactive decay of an atom's nuclei. Gamma rays have the most energy and the smallest wavelengths than any wave in the electromagnetic spectrum.

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.