A sound pulse sent vertically downwards into the earth is reflected from two different layers of the earth such that…
A. flute B. trumpet C. piano D. drum E. saxophone Correct Answer: Option C - piano
A. the wavelength B. thrice the wavelength C. one-half of the wavelength D. one-quarter of the wavelength E. three-quarters of…
A. 30° B. 36° C. 44° D. 46° E. 54° Correct Answer: Option D - 46°
A. diminished B. enlarged C. upright D. inverted E. blurred Correct Answer: Option D - inverted
A. 125° B. 70° C. 65° D. 55° E. 35° Correct Answer: Option D - 55° Explanation The angle of…
A. petrol tanker is balanced on the wheel B. heat generated by friction in the engine can be conducted to…
A. The electrophorus B. Ebonite rod C. Proof plane D. Gold leaf electroscope E. Capacitor Correct Answer: Option D -…
A. 60 Jg−¹ B. 120 Jg−¹ C. 300 Jg−¹ D. 360 Jg−¹ E. 1500 Jg−¹ Correct Answer: Option B Explanation…
A. the reaction force of the table on the ice breaks the ice into water molecules B. heat extracted from…