A. they cost less
B. they act as poor conductors preventing the penetration of the sun’s heat
C. they absorb less radiant heat than black or dark-colored clothes
D. Both a & c
A. poor night vision
B. pellagra
C. rickets
D. None of above
A. liver
C. skin
B. blood
D. kidneys
A. cools the body
B. flushes the system of its harmful elements
C. adds to the body heat
D. makes the system dirtier
A. 28
B. 37
C. 47
D. 21
A. from hotter to colder bodies
B. from colder to hotter bodies
C. in neither direction
D. in all directions
A. sound waves held on the tape
B. magnetic field on the tape
C. electrical energy
D. variable resistance on the tape
A. Controlled fission
B. Uncontrolled fission
C. Uncontrolled fusion
D. None of the above
A. Plane mirror.
B. Concave mirror
C. Convex mirror
D. Planoz convex mirror
