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A 73.6 kg weight-watcher wishes to climb a mountain to work off the equivalent of a large piece of chocolate cake rated at 514 (food) Calories. How high must the person climb?
An object located 32.1 cm in front of a lens forms an image on a screen 9.5 cm behind the lens. determine the magnification of the object
A heat engine operates between a hot resrvoir at 1500k and a cold reservoir at 500k. Determine the Carnot efficiency of this engine
A 18 liter tank of helium is at a pressure of 192 kPa at a temperature of 0 C. A.) How many moles of helium are there in the tank? B.) If the volume of the tank expands to twice its initial volume at constant pressure, what is the new temperature?..
A woman who can row a boat at 5.1 km/h in still water faces a long, straight river with a width of 6.4 km and a current of 3.5 km/h. How long (in hours) is that shortest time
You are in a hot-air balloon that, relative to the ground, has a velocity of 4.65 m/s in a direction due east. find direction of the hawk's velocity relative to the ground
An inflated rubber balloon is rubbed with the wool cloth until an excess of 1.50 multiplied by 109 electrons is on the balloon. What is the magnitude of the charge on the balloon.
An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. How far does the lighter fragment slide
A train on a straight, level track has an initial speed of 37.0 km/h. What is the speed of the train at the end of this distance
A 0.65kg block of ice is sliding by you on a very slippery floor at 3 m/s. As it goes by, you give it a kick vertical to its path. Your foot is in contact with the ice block for 0.003 seconds.
A 10.0-m long string is moved up and down with simple harmonic motion with a frequency of 33 Hz. Determine the velocity of the wave on the sting
It is desired to project an image of an object four times actual size with a lens of focal length 20 cm. What object distance should be used
A long solenoid of length 40 cm, cross section area 24 cm^2 and 20 turns per centimeter carries a current of 8.0 A. find the magnetic energy stored in the solenoid
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