A SONAR signal sent from a ship returns after 2 s. If speed of sound in water is 1500 m/s, depth of sea is MCQ with Answer and Explanation

Explanation:
Thomas Alva Edison invented the practical incandescent light bulb in 1879. He also invented phonograph. Tesla contributed to AC system. Faraday electromagnetic induction. Bell telephone.

Explanation:
a' = (F/2)/(2m) = F/(4m) = a/4.

Explanation:
Work done is given by W = F * d * cos(theta). In uniform circular motion, the centripetal force is always directed strictly towards the center of the circle, while the instantaneous displacement (velocity vector) is tangential to the circle. The angle (theta) between them is exactly 90 degrees. Since cos(90) = 0, the work done by the centripetal force is always zero.