If we are at sea level our atmosphere presses down on us with a pressure of:
- (A) 1 pounds per square inch
- (B) 14.7 pounds per square inch
- (C) 35.8 pounds per square inch
- (D) None of these
- (B) 14.7 pounds per square inch
The efficiency of a machine is:
- (A) Always greater than 100%
- (B) Always less than 100%
- (C) Always 100%
- (D) None of these
- (B) Always less than 100%
A material with high elasticity:
- (A) Does not return to its original shape upon being stretched and then released
- (B) Returns as close as possible to its original shape upon being stretched and then released
- (C) Can be stretched to infinite distances
- (D) None of these
- (B) Returns as close as possible to its original shape upon being stretched and then released
Matter and energy:
- (A) Can be converted from one to the other
- (B) When taken together, converted in all processes in a closed system
- (C) Both A & B
- (D) None of these
- (C) Both A & B
Electric current:
- (A) Flows from a higher potential to lower potential
- (B) Is caused by flow of electrons
- (C) Both A & B
- (D) None of these
- (C) Both A & B
Electricity and magnetism are:
- (A) Two facets of the same force
- (B) Always opposed to each other
- (C) Both A & B
- (D) None of these
- (A) Two facets of the same force
Ball bearings help wheels and other rotating objects:
- (A) Move without consuming any energy
- (B) Rotate more easily and with less friction
- (C) Both A & B
- (D) None of these
- (B) Rotate more easily and with less friction
Photography works by:
- (A) Capturing the souls of the objects being photographed
- (B) Capturing light reflected from the object being photographed
- (C) Both A & B
- (D) None of these
- (B) Capturing light reflected from the object being photographed
Arthur C. Clarke, the famous science fiction author, while working as a radio operator in the British army in World War-II:
- (A) Proposed building a space elevator from carbon mono-filaments
- (B) Postulated the existence of extra- terrestrial artifacts on the Moon
- (C) Proposed that a network of satellites in stationary orbit at very high altitudes around the Earth be used to bounce communication signals all over the world
- (D) None of these
- (C) Proposed that a network of satellites in stationary orbit at very high altitudes around the Earth be used to bounce communication signals all over the world
The Sino Pakistani Jf-17 thunder aircraft:
- (A) Is a commercial transport aircraft
- (B) Is neither built nor assembled in Pakistan
- (C) Has no stealth features in its engine inlets or elsewhere
- (D) None of these
- (D) None of these