A. exactly roundish
B. elliptical
C. roundish but uneven
D. cicok-wise during day and anti-clockwise
A. one-eighth that of earth
B. one-sixth that of earth
C. one-tenth that of earth
D. one-fourth that of earth
A. thermal energies
B. specific heats
C. temperatures
D. heat capacities
A. a large convex lens with short focal length
B. a large convex lens with long focal length
C. a large concave lens with a short focal length
D. None of above
A. relative terms
B. absolute terms
C. negative terms
D. positive terms
A. transverse waves
B. longitudinal waves
C. may be both types
D. none of the above
A. 7 km/s
B. 11.2 km/s
C. 1.1 km/s
D. 21.2 km/s
A. good conductor of electricity
B. bad conductor of electricity
C. perfect insulator
D. perfect conductor
A. discomfort due to heat
B. excess of heat in atmosphere
C. presence of water vapour in the air
D. absence of water vapour in the air
A. Mendel
B. Jean Picard
C. J. Priestley
D. Newton