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A lead ball is dropped into a lake from a diving board 5.08m above the water. It hits the water with a certain velocity and then sinks to the bottom with this same constant velocity. It reaches the bottom 4.72s after it is dropped ( Assume the positive direction is upward). How deep is the lake? What is the average velocity of the ball? Suppose that water is drained from the lake. The ball is now thrown from the diving board so that it again reaches the bottom in 4.72s. What is the initial velocity of the ball?
In a circuit with a knife switch, R=5.00 kΩ, C=35.0μF and the voltage across the capacitor is 5.00 V, Find how long does it take for the voltage across the capacitor to decrease to one volt
Only two forces act on an object (mass=4.61 kg), as in the drawing. Find the direction (relative to the x axis) of the acceleration of the object
The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. What is the weight of the heaviest bear
A radar receiver can be tuned to detect signals in the range of [1750 µm to 2750 µm]. What is the frequency difference between the minimum and maximum wavelength
A 1000-kg car is travelling west at 17.0 m/s toward an intersection. What is the angle of their velocity after the collision relative to the east direction
A light bulb has a resistance of 270 . It is connected to a standard wall socket (120 V rms, 60.0 Hz). Determine the rms current in the bulb
What is the approximate distance between the Earth and the Moon if the radius of the Earth is approximately 6x10^6m
The catapult on an aircraft carrier can take an aircraft from 0 to 197 mph ( the launch speed) in 5 Seconds, at which time the aircraft launches
At the end of a race a runner decelerates from a velocity of 10.00 m/s at a rate of 0.400 m/s2. What is her final velocity
Mayan kings and many school sports teams are named for the puma, cougar, or mountain lion Felis concolor, the best jumper among animals. With what speed, in SI units, does it leave the ground to make this leap
A rainbow trout is an extremely cautious fish constantly monitoring the surface of the stream looking for both food and predators. A trout escapes immediately, once noticing something suspicious, like a fisherman caring his fishing gears.
a jetliner traveling northward is landing with a speed of 77.9ms. once the jet touches down it has 832 m of runway in
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