101-1 The way Sciense Works Final Exam

(mirowave)

1. Higher temperature means atoms and molecules spin faster.

2. Microwave oven is a very energy efficient way to cook food, it is therefre a low voltage design internally.

3. Aluminium foil would burn inside an operating microwave oven, this means the oven case has to be built from some special type of heat resisting metal.

(mic)

4. Amplifiers always require external power source to work.

Multi-cone units in loudspeaker is to enhance sound production through reseonace effect.

5. Holes in some highend loudspeaker is an areodynamical design to enhace sound volume, so they shouldn't be blocked.

(color)

6. Blue and yellow lights combined will form white light.

7. Science three primery colors (red, green, blue) will be sufficent to reproduce all colors human can see, there is no point to make display which has more then three types of color pixels.

(cpu)

8. Half adder is so named because it output only the half of the true value. so need doubled to complete the task.

Semiconductor has small energy gap for separating electrons at mobile state and less mobile states.

9. A transistor as three ends, namely sourse, drain and gate.

(comm)

Magnetic field in space is like momentum of a object with mass, don't disappear easily.

10. When an object driven at the same pace as natural frequency, its back-and-forth motion enhanced a lot, this ia called "resonance".