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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? (1 (food) Calorie = 103 calories).
The coefficients of friction between a block of mass 0.5 kg and a surface are ?s = 0.75, What is the magnitude of the frictional force (in newtons) on the block if the block is at rest
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.60×106N, What is the total work done by the two tugboats on the supertanker
The impact of the racket gives the ball a constant acceleration of 46 cm. Illustrate what is the magnitude of the net force acting on the ball?
the electron in a hydrogen atom is infintely distant at zero potential energy and is at an average radius of a0=.0529 nm when bound by 13.6 eV. find the nearest principal quantum number in this state
A Carnot engine performs work at the rate of 480 kW while using 760 kcal of heat per second. If the temperature of the heat source is 571°C, at what temperature (in Celsius) is the waste heat exhausted
A 110 pound person climbs the benches from the bottom to the top of Sun Angel Track Stadium. Calculate the minimum amount of glucose (in grams) that would need to be oxidized
An electron with an initial speed of 4.80×10^5 m/s is brought to rest by an electric field. What was the potential difference that stopped the electron?
A plane heads due north while a crosswind blows west. The plane's resultant velocity is 620 km/h, 22° west of north. What is the velocity of the wind
The moment of inertia of a 0.910 kg bicycle wheel rotating about its center is 0.123 kg*m2. What is the radius of this wheel
q1. a diffraction grating with 395 linesmm is 1.00 m in front of a screen. what is the wavelength of light whose
q1. a 22 kg girl slides down a playground slide that is 8.50 m high. when she reaches the bottom of the slide her speed
To save on heating costs, the owner of a greenhouse keeps 580 kg of water around in barrels. What is the minimum ampere rating of an electric heating system
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