Aman stands on top of a cliff and shouts.
he hears the echo on the third clap when
he claps his hand at the rate of two claps
per second. what is the distance between
man & the obstruction, if the velocity of
sound is 320 m/s
[iom 98]
a. 320
b. 460
c. 640
d. 160

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

Suppose astronomers built a 140-meter telescope. how much greater would its light-collecting area be than that of the 10-meter keck telescope? express your answer using two sign

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.