Why does a patient receive more radiation from a CT scan than from having an X-ray image made?
A. Fewer X-rays are reflected in a CT scan
B. Higher-frequency rays are used in a CT scan
C. A CT scan involves multiple X-ray images
D. The X-rays are more powerful in a CT scan

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Is the number of complete movements of a wave per second.

The flow of electrons from one atom to another is called