A. at which a person escapes an accident
B. that is lost on account of the use of belting
C. that a space satellite must attain to escape from the earth’s gravitational field
D. which a motor cyclist must attain to escape air resistance
A. Alfred Einstein
B. Ernest Lawrence
C. Cavendish
D. W.H. Carothers
A. bifocal glasses
B. cylindrical lenses
C. concave spherical lenses
D. convex lenses
A. Marconi
B. Mendel
C. Einstein
D. Kepler
A. Newton
B. Cavendish
C. Galileo
D. Marconi
A. nuclear explosion
B. human effort
C. any movement of an object
D. water power
A. a natural phenomenon that defies an explanation
B. a repetition of one’s own voice
C. a sound repeated by reflection
D. the proof that dead matter can speak
A. much faster
B. much slower
C. at no difference
D. None of above
A. Absence of water vapor in the air
B. Clouds generate air currents and disturbances which do not promote frosty conditions
C. Clouds prevent radiation and therefore help the ground temperature remain higher
D. moisture of air has been sucked away by the clouds
A. dry air
B. warm air
C. cool air
D. None of above