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A ball of circumference 72.7 cm and mass 605 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity. (The density of water is 103 kg/m3.)
a) Calculate the buoyant force on the ball. (Indicate the direction with the sign of your answer.)
b) Calculate the drag force the ball experiences while it is moving upward at constant velocity. (Indicate the direction with the sign of your answer
A disk-shaped merry-go-round of radius 2.99 and mass 170 rotates freely with an angular speed of 0.623. Calculate the final kinetic energy for this system
A destroyer sends a sonar pulse out to detect a submarine directly below the ship in the ocean. find how deep is the submarine
After collision, the component of the total momentum parallel to the floor must remain zero, since the net external force acting on the plate has no component parallel to floor.find out the masses of pieces 1 and 2.
The runner turns around and runs in the -x direction at the same speed. Now what is the kinetic energy of the runner
An object is released from rest and falls in free fall motion. The speed v of the object after it has fallen a distance y is given by v2 = 2gy, what is the percent uncertainty in the calculated value of g
a car traveling in a straight line has a velocity of 8.5 ms. after 6.0 s its velocity is 8.0 ms. what is the cars
A typical lightning flash delivers about 30C of negative charge from cloud to ground. How many electrons are involved
suppose the acceleration of a particle is a function of x where axx2.4s-2x.a if the velocity is zero when x 1.0m what
While attempting to tune the note C at 523 Hz, a pianotuner hears 2.00 beats/s between a reference oscillator and the string. What are the possible frequencies of the string
A uniform bar of length 18 m and mass 1 kg is attached to a wall with a hinge that exerts a horizontal force Hx and a vertical force Hy on the bar. find the magnitude of the horizontal force Hx on the pivot
The wave function y(x, t) for a certain standing wave on a string fixed at both ends is given by y(x, t) = 3.70 sin (0.220x) cos (270t), What is the speed of transverse waves on this string
Two capacitors, C1 = 28.0 µF and C2 = 41.0 µF, are connected in series, and a 18.0-V battery is connected across them. find the energy stored in each individual capacitor
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