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Problem: What is the net power that a dog with surface area of 0.075 m2 radiates if his emissivity is 0.75, his skin temperature is 315 K, and he is in a room with a temperature of 290 K? The Stefan-Boltzmann constant is 5.67 x 10-8 W/(m2•K4).
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A cardboard milk container has two holes, one above the other,punched in its side. find the level of the milk at that instant
A torque of 12 N.m is applied to a solid uniform disk of radius 0.50 m. If the disk accelerates at 5.7 rad/s^2 what is the mass of the disk
An engineer is designing the runway for an airport. Of the planes that will use the airport, the lowest acceleration rate is likely to be 3 m/s2. The takeoff speed for this plane will be 65 m/s. Assuming this minimum acceleration, what is the minimum..
determine the maximum height attained by the 2.1-kg mass
a body of 2kg is suspended from the ceiling of an elecator moving up with an accelration g. find the apparant weight of
Visible light passes through a diffraction grating that has 900 slits per centimeter, and the interference pattern is observed on a screen that is 2.78 m from the grating, What is the difference between these wavelengths
q1. a 1000 kg car travelling at a speed of 20 ms skids to a halt on wet concrete where fk 0.50. how long is the cars
a 881 kg car is going 26 ms and the driver has to slam on his brakes to prevent an accident. assume that a total of
A football player carrying the ball runs straight ahead at the line of scrimmage and directly into a wall of defensive linemen. Find the magnitude and direction of his average acceleration
A string, stretched between two fixed posts, forms standing wave resonances at 350 Hz and 420 Hz. What is the greatest possible value of its fundamental frequency
A car is travelling in a straight line at a speed of 91.0 km/hr. how much further will the car travel after the brakes are applied
A single lens is used to cast an image on a screen that is 60 centimeter from the lens. The image is three times the size of the object. Construct a ray trace to verify your calculations
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