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. alpha rays
B. beta rays
C. gamma rays
D. X-rays
E. Both a, b & c

A. only real images
B. only virtual images
C. both real and virtual images
D. only inverted images

A. Infrasonic
B. Ultrasonic
C. Hypersonic
D. Supersonic

A. atmospheric pressure
B. the direction of the ship
C. electric current
D. wind velocity

A. pykometer
B. pyrometer
C. photometer
D. potentiometer

A. Inertia
B. Zero gravity
C. Centre of gravity
D. Acceleration

A. sound energy
B. radio energy
C. mechanical energy
D. electrical energy

A. 0°C
B. 0°F
C. 372°C
D. 273°C