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A rock is dropped off the side of a bridge and hits the waterbelow 2s later.
(a) What was the rock's velocity when it hit the water?
(b) What was the rock's average velocity asit fell?
(c) What is the height of the bridge above thewater?
Compute the voltage drop along a 28 m length of household no. 14 copper wire (used in 15 A circuits). The wire has diameter 1.628 mm and carries a 14 A current
A high diver of mass 80.0 kg jumps off a board 10.0 m above the water. what average upward force did the water exert on him
A compact disc, initially at rest, is spun up to an angular velocity of 22 rad/s by a constant angular acceleration of 4.0 rad/s^2. How much time does the disk take to reach maximum velocity
A fire truck has a siren with that generates a sound with a frequency of 6686 Hz. what frequency will you observe
Two wooden crates rest on top of one another. The smaller top crate has a mass of m1 = 24.0 kg and the larger bottom crate has a mass of m2 = 86.0 kg. What is the acceleration of the small crate
A container encloses 4.0 mol of an ideal gas that has molar mass M1 and 1.5 mol of a second ideal gas that has molar mass M2 = 3M1
you throw a stone upward with an intial speed of 5.8m/s from a third-story office window. Find the speed of the stone just before it hits the ground
A converging lens has a focal length of 100.0 cm. A 12.0-cm-tall object is located 124.0 cm in front of this lens. find Is the image real or virtual
A typical capacitor in an MP3 player has C =0.10 µF. If a charge ±8.7 µC is placed on the plates, what is the voltage across the capacitor?
A 2.6-kg cart is rolling along a frictionless, horizontal track towards a 1.7-kg cart that is held initially at rest. What is the total momentum of the system of the two carts
A photoelectric experiment using a cesium metal surface produces stopping potentials of 0.95V and 0.38V using light with wavelengths of 435.8nm and 546.1nm, respectively. find the threshold frequency
If a canon ball is launched with a velocity of 90m/s at anangle of 35 degrees, How fast is it moving upward and how fast isit moving across land
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