Physics a girl tosses a stone into the air with initial velocity of 8.00 meters/second and hears the splash when it hits water 4.20 seconds later. Using 343 meters/second how deep is the water level in the well below where she tossed the stone?

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

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

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?