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A beach ball filled with air is pushed about 1 m below the surface of a swimming pool and released from rest. Which of the following statements are valid, assuming the size of the ball remains the same? (Select all that apply.)
a) The buoyant force on the ball decreases as the ball approaches the surface of the pool.
b) As the ball rises in the pool, the buoyant force on it increases.
c) The buoyant force on the ball equals its weight and remains constant as the ball rises.
d) The buoyant force on the ball while it is submerged is approximately equal to the weight of the volume of water that could fill the ball.
e) When the ball is released, the buoyant force exceeds the gravitational force, and the ball accelerates upward.
A girl jumps on bike and exerts torque of 25.0 N-m perpendicular to the pedal. Moment of inertia of bike wheel is I = 0.045kg-m^2. What is angular velocity of bike wheel at end of this time
The power dissipated in a series RCL circuit is 56.3 W, and the current is 0.273 A. Determine the voltage of the generator
q1. if a car travelling at 63 kmh will skid 18 m when its brakes lock how far will it skid if it is travelling at 150
A group of hikers hears an echo 5 s after shouting. If the temperature is 16.0°C, how far away is the mountain that reflected the sound wave.
Analysis of Physics, Two pistons push down on the fluid filling two cylinders connected by a narrow hose, as shown in the figure. The area A1 is 1 square inch, and the area A2 is 10 square inches
The catapult of the aircraft carrier USS Abraham Lincoln accelerates an F/A-18 Hornet jet fighter from rest to a takeoff speed of 77.33 in a distance of 93.57 . suppose constant acceleration.
In soccer, a speed record was set for kicking a soccer ball at 43m/s. If the soccer player kicked the ball from ground level at an angle of 30° from the horizontal, what would be the flight time of the soccer ball? Assume that air resistance is ne..
A bob of mass m = 0.300kg is suspended from a fixed point with a massless string of length L = 21.0cm, What tangential speed v must the bob have so that it moves in a horizontal circle with the string making an angle 24.0
The statue of Isaac Newton is crated and moved from the Oxford Museum of Natural History and Science for cleaning. find the normal force between the ramp and the crate
Huck Finn walks at a speed of .6m/s across his raft (that is perpendicular to the raft's motion relative to the shore). what is Huck's velocity(speed and direction) relative to the river bank
q1. a 2.5g copper penny is given a charge of -0.50 mc.how many excess electrons make up this charge?what is the
A 1360 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960 N crate hangs from the far end of the beam.
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