1A.
A valve is used to perform which of the following tasks?
A. The control the flow of liquid
B. The increase in the temperature of a liquid
C. Facilitate the evaporation of a liquid
D. Decrease the density of a liquid
E. None of the above
2A.
Which of the following happens when white light strikes a black object?
A. Blue light is reflected
B. Red light is reflected
C. No light is reflected
D. All of the light is reflected
E. None of the above
