Everyday Science MCQs

Correct answer D. Both A and C

Correct answer B. Four times

Correct answer A. 281 m/s

Correct answer D. An apparent decrease in frequency

Correct answer D. Destructive interference

Correct answer A. It equals the difference of their frequencies

Correct answer C. Frequency greater than 20 kHz

Correct answer B. Copper

Correct answer C. Zero

Correct answer B. Isothermal

Correct answer A. Antinodes

Correct answer B. Wavelength

Correct answer B. Energy

Correct answer B. Equal to each other

Correct answer D. Parabola

Correct answer A. at²/2

Correct answer B. Constant if the rate of ejected gases is constant

Correct answer C. K.E. changes but momentum is conserved

Correct answer C. It increases his momentum

Correct answer A. Force acting