Which of the following would be an example of basic research?

spencer's research on wwii radar technology that led to the invention of the microwave oven.
experimenting to determine the fundamental properties of x-rays.
edison's research and use of other scientists' work to invent the light bulb.
morrison and franscioni's research done to create the frisbee.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.