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A 1,450-kg submarine rises straight up toward the surface. Sea water exerts both an upward buoyant force of 16,140 N on the submarine and a downward resistive force of 1,030 N. What is the submarine's acceleration?
An AC adapter for a laptop computer unit uses a transformer to reduce the line voltage of 110 V (rms) to a voltage of 18.5 V. What is the rms current delivered to the transformer
a flotation device is in the shape of a right cylinder with a height of 0.550 m and a face area of 4.00 m2 on top and
The subfloor on which the flooring sits is at a temperature of 16.1 degree C, while the air in the room is at 19.2 degree C. What is the rate of heat conduction through the floor
In a slow pitch softball game, a .200 kgsoftball crosses the plate at 15.0 m/s at an angle of 45 degreesbelow the horizontal. what is the maximum force on the ball
During a week of study, a 9.0 acre pond receives 65 mm of rain. An adjacent Sunken Colorado pan records an evaporation of 38 mm. What is the net change of water volume in the pond
A capacitor is connected across an ac source that has voltage amplitude 61.5 and frequency 80.0. What is the phase angle for the source voltage relative to the current
A 5 kg block sits on top of a 10 kg block which rests on a horizontal frictionless surface. What is the minimum coefficient of static friction necessary to keep the top block from slipping on the bottom block
A 51.5 kg hoop rolls along a horizontal floor so that its center of mass has a speed of 0.110 m/s. How much work must be done to stop it
What is the minimum energy (in electron volts)that is required to remove the electron from the ground state of anionized atom (Z=2)? What is the ionization energy for this ion
A person wearing the shoes has a mass of 65kg. Estimate the pressure exerted on a floor by one wide heel of area 16 cm2
A commuter airplane starts from an airport and takes the route shown in the figure below. The plane first flies to city A located 175 km away in a direction 30.0° north of east. Find the angle in degrees west of north
A member of an aircraft maintenance crew wears protective earplugsthat reduce the sound intensity by a factor of 380. When a jetaircraft is taking off, the sound intensity level experienced bythe crew member is 84 dB.
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