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1. A 40-cm-diameter sphere is released from rest under water. If it weighs 380 N in air, what is its initial acceleration under water if the added mass is neglected? If the added mass is included? 2. A 20-cm-diameter 4-m-long horizontal cylinder is released from rest under water. If it weighs 1500 N in air, what is its initial acceleration under water if the added mass is neglected? If the added mass is included?
Water flows at 0.950 m/s from a hot water heater, through a 450-kPa pressure regulator. What's the flow speed in this pipe
A racing car of mass 950 kg accelerates from rest with an acceleration of 3.9 m/s^2 for 7.5 s. What is the net work done by the car
a proton is placed in a uniform electric field of 2.75 x 103 nc. calculate the magnitude of of the electric force felt
A 2-cm-diameter sphere moves at Re ¼ 10 (separation is just occurring). What is its speed if it is submerged in (a) water at 10-C, (b) air at 40-C and 400 kPa, and (c) water at 90-C.
A Solid cylindrical disk of mass M= 2 kg and radius R = 30 cm rotatates around its central axis at constant angular acceleration. Originally, angular velocity of the disk is 0.5 rad/s. After two complete revolutions disk's angular velocity is 2.5 rad..
A wheel is spinning clockwise at a 10 revolutions per second at t = 0. Due to friction in the bearings supporting the axle, the wheel slows down, losing 0.500 revolutions per second in angular velocity each second, until it comes to rest.
A hot-air balloon is ascending at the rate of 14 m/s and is 98 m above the ground when a package is dropped over the side. How long does the package take to reach the ground
What is the electric potential at a point 0.55 m away from a point charge of 3.0m C
An enlarging camera has a maximum extension of 4 ft between the negtive and the paper. what is the maximum enlargement that can be made with this equipment
The position of a softball tossed vertically upward is described by the equation y = 7.00t - 4.90 t2, Determine the velocity component vy (in m/s) of the ball at t = 1.26 s
A circuit contains a 120 V power supply operating at 60 Hz. what elements are in the circuit and what are their values
In an old house, the heating system uses radiators, which arehollow metal devices through which hot water or steam circulates. what is the temperature of the newly painted radiator
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