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A person pushes horizontally with a force of 170 N on a 60 kg crateto move it across a level floor. The coefficient of kineticfriction is 0.25. (a) What is the magnitude of the frictionalforce? (b) What is the magnitude of the crate's acceleration?
Initially, the switch in the figure below is open and the capacitor is uncharged. V = 3 V and C = 18 µF. How much charge flows through the switch after the switch is closed
A person walks in the following pattern: 9.8 km north, then 1.6 km west, and finally 7.0 km south. Construct the vector diagram that represents this motion and from it judge how far and in what direction a bird would fly in a straight line from th..
at the local grocery store you push a 15.0- shopping cart. you stop for a moment to add a bag of dog food to your cart.
A spherical balloon is made from a material whose mass is 3.00kg. The thickness of the material is negligible compared to the1.6 m radius of the balloon. Find the absolute pressure of the helium gas
a solenoid is wound with a single layer of insulated copper wire of diameter 2.700 mm and has a diameter of 4.000 cm
A soldier has a huge contraption that notches a large 4 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the arrow
A piece of copper with a mass of 1.0kg and density of 8900kg/m^3 is suspended from a string and conpietely in a contaner with water. determine the volurm of the piece of copper
a cylinder of diameter d floats with l of its length submerged. The total height is L. What is the frequency of oscillation
A force F applied to an object of mass m1 produces the acceleration of 3.10 m/s2. The same force applied to a second object of mass m2 produces an acceleration of 1.90 m/s2.
The frequencies of the spectral lines in light from a distant galaxy are found to be two-thirds as great as those of the same lines in light from nearby stars. Find the recession speed of the distant galaxy
A 100-W lightbulb has a resistance of about 12 ?when cold (20 ?C) and 156? when on (hot). Estimate the temperature of the filament
a tugboat tows a ship at a constant velocity. the tow harness consists of a single tow cable attached to the tugboat at
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