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A spring with a spring constant of 100N/s is compressed adistance of 0.1m horizontally. When the spring is released itpushes a 0.25 kg mass that was initially at rest against thespring. What is the maximum speed attained by the mass?
Two space stations are at rest relative to each other and are 6.0 × 107 m apart, as measured by observers on the stations. how long does it take to travel from one station to the other
A 120-V motor has mechanical power output of 2.50 hp. It is 90.0% efficient in converting power that it takes in by electrical transmission into mechanical power, Find the current in the motor
If a man is capable of lifting a 121 lb stone on land, how heavy a stone could he lift under water
A playground merry-go-round has a radius of 4.40 m and a moment of inertia of 255 kg*m^2 and turns with negligible friction about a vertical axle through its center. What is the average power supplied by the child
A test tone used on a radio has a frequency of 951 Hz. What is the wavelength of this sound in air at normal room temperature
Two friends are carrying a crate of mass 200 kg up a flight of stairs. The crate has length 1.25 m and height 0.500 m, What is the magnitude of the upper person's force
A nonconducting disk of radius a lies in the z = 0 plane with its center at the origin. The disk is uniformly charged and has a total charge Q. Find Ez on the z axis at the following positions.
A fan running on HIGH is switched to LOW and slows down to 83.5rad/s in 1.75s due to a deceleration of 42.0 rad/s/s. Calculate the HIGH speed of the fan
A standing wave on a 77.4cm long string has three antinodes. If the string has linear mass density 3.92×10?5kg/m and tension 10.1N , what are the wave's frequency
After going through a bad break-up with your significant other you end up drinking half a case of beer. The next day you decide the cloud of despair must be fought with exercise. How much longer will it take you to burn off the calories of the bee..
A pilot flies her route in two stright-line segments. The displacement vector A for the first segment has a magnitude of 249 km at a direction of 30 degress north of east.
A torsion pendulum is constructed of a copper rod of radius 3 mm and length 50 cm. what is the period of oscillation
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