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A swimmer swims in still water at a speed of 7.44 m/s. He intends to swim directly across a river that has a downstream current of 2.76 m/s.
(a) What must the swimmer's direction be? (Answer must include the degrees and whether it's upstream, downstream, or neither)
(b) What is the velocity relative to the bank?
A tuning fork with a frequency of 440 Hz is held just above the top of a uniform glass tube containing water. What is the speed of sound in air
A metal sphere is filled with ammonia as part of a refrigeration device. what is the mass of the ammonia if it fills up half of the sphere
City lies directly west of city . When there is no wind, an airliner makes the 6130 round-trip flight between the two cities in 6.50 of flying time while traveling at the same speed in both directions. How fast is the wind blowing
A satellite in a circular orbit around the earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. Calculate the amount of that work converted to heat
An iron tower in is 399 meters tall on a cold day (T = -6.7 degrees Celsius). What is its height of the tower on a hot day while the temperature is 31.5 degrees Celsius.
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 132-kg laser sensor that measures the thickness of the ice, find the tension in the cable towing the sensor
The 230,000 lb space-shuttle orbiter touches down at about 220 mi/hr. find the corresponding distance (in feet) traveled by the orbiter
If a 35.0 N·m torque on a wheel causes angular acceleration 20.0 rad/s2, what is the wheel's rotational inertia
Besides the gravitational force, a 3.25-kg object is subjected to one other constant force. The object starts from rest and in 1.20 s experiences a displacement of (4.10 - 3.30) m, where the direction of is the upward vertical direction. find out ..
Illustrate a basketball momentum vectors
A 2 kg block and a 3 kg block are pushed across a 2 m long frictionless table, Compare the kinetic energies of the two blocks when they reach the end of the table
What type of car was involved in the hit and run
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