Friction can be reduced by changing from which of the following?
A. Sliding to rolling
B. Rolling to sliding
C. Dynamic to Static
D. Walking to Running (more…)
How many meters in one mile?
A. 1000 meters
B. 1509.34 meters
C. 1609.34 meters
D. 2400 meters
Which lens is by a camera to form an image?
A. convex lens
B. concave lens
C. condenser lens
D. None of these (more…)
Which one of the following is the largest Galaxy in the universe?
A. Andromeda Galaxy
B. Milky-Way
C. Spiral Galaxy
D. Horseshoe Galaxy
Sound energy is converted into _________ by a microphone?
A. Microwaves
B. Electrical signals
C. Optical Signals
D. Heat energy