Physics MCQs

852 MCQs  (Page 71 of 86)

Ultrasonic have__________________?
A. Frequency in the audible range
B. Frequency is greater than 20 khz
C. Frequency lower than 20 hz
D. All of above
The thrust on the rocket in the absence of gravitational force of attraction is__________________?
A. Constant
B. Not constant
C. Constant if the rate of ejected gases is constant
D. Constant for short range rocket.
The range of the projectile at 30 deg and 60 deg are__________________?
A. Equal to 45 deg
B. Equal to 90 deg
C. Equal to each other
D. None of the above