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A person is exercising on an elliptical trainer at a steady VO2 of 3.92 l/min. Suppose that this person has a metabolic efficiency of 0.227 and that each liter of oxygen consumed liberates 5.05 kcal of energy. Find what is this person mechanical power output?
In the Millikan oil-drop experiment, an electric field of 1.92 x105 N/C is maintained at balance across two platesseparated by 1.50 cm. Find the potential difference between the plates
The vector is 3.5 long and is directed into this page. Vector points from the lower-right corner of this page to the upper-left corner of this page and has components -19.5, 25.
Someone at a fifth-floor window (20 m above the ground) hurls a ball downward at 40.0° at a speed of 14.0 m/s. How long does the ball take to reach the sidewalk
a gas is compressed from 600 cm3 to 200 cm3 at a constant pressure of 400 kpa. at the same time 100 j of heat energy is
Two parallel 1 m by 1 m copper plates are separated by a 1 mm gap. Both plates are at a potential of + 100 V. What is the electric field between the plates
a 1.50 kg snowball is fired from a cliff 12.5 m high. the snowballs velocity is 14.0 ms directed 41.0 degrees above the
A closed hollow sphere of radius R=60.0cm (the surface area of asphere of radius R is 4πR^2) is made of styrofoam havingthermal conductivity k=0.0450 watt/m celsius, find the thickness(assumed uniform) of the styrofoam wall of thehollow sphere
You rev your car's engine to 2900 rpm (rev/min). What is the period of the engine
your digital camera has a lens with a 50 mm focal length and a sensor array that measures 4.82 mm x 3.64 mm. Suppose you're at the zoo, how far away from the object should you be
A 150-N sphere 0.20 meter in radius rolls without slipping 6.0 meter down a ramp that is inclined at 34 degree with the horizontal. Find the angular speed of the sphere at bottom of slope
The wavelength of light visible to the human eye is on the order of 6 × 10-7 m. Find the frequency of the lightwave if the speed of light in air is 2.99792 × 108 m/s
The water in a deep underground well is used as the cold reservoir of a Carnot heat pump that maintains the temperature of a house at 294 K. Determine the temperature of the well water
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