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The temperature in an electric oven is 153 °C. The temperature at the outer surface in the kitchen is 35.5 °C. Theoven (surface area = 1.46 m2) is insulated with materialthat has a thick ness of 0.0139 m and a thermal conductivity of0.0129 J/(s m C°). (a) How much energy is usedto operate the oven for 6.42 hours? (b) At a price of $0.10 per kilowatt-hour for electrical energy, what is the cost(in dollars) of operating the oven?
Intuitively, the man will not catch the bus unless he is running fast enough. In mathematical terms, there is a constraint on the man's speed so that the equation above gives a solution for that is a real positive number.
a girl throws a plastic ring hula hoop to the right with a velocity v0 and a movement that produces a counterclockwise
A 210 g piece of ice at 0°C is placed in 410 g of water at 22°C. The system is in a container of negligible heat capacity and is insulated from its surroundings. How much of the ice melts
imagine assembling four equal charges one at a time and putting them at the corners of a square. find the total work
The 2007 world record for the men's 100m dash was 9.77 seconds. The third place runner crossed the finish line in 10.07 s. how far behind is the third place runner
An incident beam of photons is scattered through 167.0° the wavelength of the scattered photons is 125.29 pm. What is the wavelength of the incident photons
A solid disk is rotating about an axis with uniform angular velocity. Another disk (with the same moment of inertia about the rotating axis)is dropped on top of it, How is the new angular velocity related to the old one
Three balls are constrained to move on the circumference of a circle of radius R. find the characteristic frequencies of the system
a 60kg girl is standing on a frictionless skateboard. What isthe magnitude of the force exerted on the girl by the skateboard?600N? What is the acceleration of the girl
What is the horizontal distance between elbow and the point where the weight of the forearm acts.
Using the idea of a dozen as an example again, if you have 2 dozen blocks and their total mass is 48 kg, What is the mass of a single molecule
The position vector of a particle of mass 1 kg is given by rarrowbolditalic = 6 ihatbold + 3t2 jhatbold, where r is in meters and t is in seconds. Determine the angular momentum and torque acting on the particle about the origin.
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