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A man eats a dessert that contains 170 Calories. (1 Calorie = 4186 J) The skin temperature of the man is 37.4 °C and that of her environment is 20.8 °C. The emissivity of her skin is 0.78 and its surface area is 1.3m2. Find how many hours would it take her to emit anet radiant energy from her body that is equal to the energy contained in this dessert?
Design a decorative "mobile" to consist of a low-mass rod of length 0.46 m suspended from a string so that the rod is horizontal, find the tension in the string that supports the mobile
What is mechanical energy dissipated by resistive forces
electrical power generation is one of the largest sources of human-caused greenhouse gas emissions. these emissions are
A very tall flagpole, temporarily charged uniformly by lightning, What is the linear density of the charge on the flagpole
A baggage handler throws a 14.0 kg suitcase horizontally along the floor of an airplane luggage compartment with an initial speed of 1.40 m/s. The suitcase slides 1.80 m before stopping.Use work and energy to find the suitcase's coefficient of kineti..
A 4.2kg object,initially at rest,''explodes''into three objects of equal mass. How much kinetic energy was released in the explosion
A portion of a soap bubble appears green ( wavelength = 500 nm invacuum) when viewed at normal incidence in white light. find the two smallest, non-zero thickness for the soap film
A square loop with sides of 20 cm is falling through a magnetic field at v=5 m/s. The magnetic field is going into the page and is increasing as the loop falls farther through it. B = 3.0 T - 1.5 T * y. Also, the acceleration due to gravity is 9.8..
Your friend Joe hangs from a horizontal bar by his two hands, with his arms each inclined 35 degrees from the vertical, what is the tension in each of his arms
A 5 kg ball is thrown upward with an initial speed of 30 meters per second. Suppose there is a constant air resistance of 25N opposing the motion during its entire up and down path
An Earth satellite moves in a circular orbit 660 km above the Earth's surface. The period of the motion is 97.7 min. What is the speed of the satellite? What is the magnitude of the centripetal acceleration of the satellite?
A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of itsengines is 3.90 x 105 N. In being launched from rest itmoves through a distance of 72.8 m and has a kinetic energy of ..
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