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A rock of mass 43 kgaccidentally breaks loose from the edge of a cliff and fallsstraight down. The magnitude of the air resistance that opposes itsdownward motion is 257 N. What is the magnitude of the acceleration of the rock?
A vinyl record plays at 33.3 rpm. Assume it takes 9 s for it to reach this full speed, starting from rest. What is its angular acceleration during the 9 s?
A loop of wire has the shape shown in the drawing. The top part of the wire is bent into a semicircle of radius r = 0.23 m. The normal to the plane of the loop is parallel to a constant magnetic field ( = 0°) of magnitude 0.73 T.
A 7000 kg plane is launched from the aircraft carrier in 2 seconds by a force of 350000 N. What is the plane's acceleration.
an electron that has a velocity withxcomponent 2.9 x 106 ms andycomponent 3.7 x 106 ms moves through a uniform magnetic
A wave has angular frequency 140 rad/s and wavelength 1.60 m. Calculate the angular wave number
A father and a daughter balance a teeter-totter to illustrate the principle of the lever. If the father whose weight is 150 N is 8 m from one end, how far away on the opposite side of the fulcrum should the 50-N daughter stand to balance the teeter-t..
A 0.267 T magnetic ?eld in a mass spectrometer causes an isotope of sodium to move in a circular path with a radius of 0.068 m. what is the isotope's mass
two parallel metal rods form a plane inclined at 20.0deg to the horizontal. the upper end of the rods are connected
If you fire a cannonball straight upward with a startingspeed of 20m/s. how high does it go, and how long will it be in theair? What is the velocity before it strikes to the ground?
A car is traveling at 59.0 km/h on a flat highway. If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop
The evolution of the universe after the big bang is divided into a radiation dominated universe and a matter dominated universe. Which type of universe do we live in and what does it mean to say radiation or matter dominated the universe?
A 3.4-m-tall, 90-cm-diameter concrete column supports a 4.0×10^5kg load. By how much is the column compressed
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