The maximum and minimum thermometer reads the
A. the maximum temperature during the day and the minimum temperature at night at all times. B. the maximum temperature at night and minimum temperature during the day from the last reset B. the maximum temperature at night and minimum temperature during the day at...
The mass of a load is doubled while the force acting on it is halved. The resulting acceleration of the load is
A. quadrupled B. quartered C. halved D. doubled Correct Answer: Option A – quadrupled
An 800 kg car moving at 80 km hr‾¹ collides with a 1200 kg car moving at 40 km hr‾¹ in the same direction. If the cars stick together, calculate their common velocity.
A. 60 km hr‾¹ B. 8 km hr‾¹ C. 40 km hr‾¹ D. 56 km hr‾¹ Correct Answer: Option B – 8 km hr‾¹ Explanation From momentum conservation (800 x 80) – (1200 x 40) = (800 + 1200) V = 64000 – 48000 = 2000V 16000 = 2000V V = 16000/2000 = 8kmh‾¹ The common...
Which of the following characteristics of waves can a ripple tank be used to demonstrate?
I. Reflection II. Refraction III. Diffraction A. I, II and Ill B. ll and ll only C. l and lII only D. I and II only Correct Answer: Option C – l and lII only
In which of the following media is the speed of sound the least?
A. Air B. Brass C. Water D. Wood Correct Answer: Option A – AirProducts
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