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Two forces act on a 5kg object. One force is 40 N and directed east. the other force is directed west. The acceleration of the object is 3 m/s west. what is the magnitude and direction of the second force?
The mean distance between the Earth and the Sun is 1.50×1011 m. The average intensity of solar radiation incident on the upper atmosphere of the Earth is 1390 W/m2, determine the total power radiated by the Sun
A very long, straight solenoid with a cross-sectional area of 2.30cm2 is wound with 93.4turns of wire per centimeter. What is the magnitude of the emf induced in the secondary winding at the instant that the current in the solenoid is 3.2
Consider two identical particles of spin 1/2 that are confined in a cubical box of side L. Find the energy and wave function of this system
A uniform door weighs 46-N and is 0.9 m wide and 2.5 m high. What is the magnitude of the torque because of the door's own weight about a horizontal axis perpendicular to the door and passing through a corner.
What is a vertical velocity of the ball
A helicopter is ascending vertically with the speed of 5.79. At a height of 127 above the Earth, a package is dropped from a window. How long take the package to hit the ground.
A charge of 2.65mC is placed at each corner of a square 0.450m on a side, Determine the direction of the force on a charge
A 10.3 kg block is dragged over a rough, horizontal surface by a 63.6 N force acting at 21° above the horizontal. Find the total change in the block's kinetic energy
A luge and its rider, with a total mass of 83kg, emerge from a downhill track onto a horizontal straight track with an initial speed of 44m/s. Assume that they stop with the constant deceleration of 2.9 m/s2.
A group of hikers hears an echo 5 s after shouting. If the temperature is 16.0°C, how far away is the mountain that reflected the sound wave.
A 6.0 kg block of aluminum is heated from 20°C to 90°C at atmospheric pressure. Find the work done by the aluminum
The minimum distance required to stop a car moving at 34 mi/h is 42 ft. What is the minimum stopping distance for the same car moving at 64.0 mi/h, assuming the same rate of acceleration.
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