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Suppose you walk into a sauna that has an ambient temperature of 50.0 C.
(a) Calculate the rate of heat transfer to you by radiation given your skin temperature is 37.0 C , the emissivity of skin is 0.98, and the surface area of your body is 1.50 m^2.
(b) If all other forms of heat transfer are balanced (the net heat transfer is zero), at what rate will your body temperature increase if your mass is 75.0 kg?
Battery-powered electricity is very expensive compared with that available from a wall receptacle. Estimate the cost per kWh of an alkaline D-cell
The central star of a planetary nebula emits ultraviolet light with wavelength 104nm, What is the first-order diffraction angle
The magnitude of F is 306 newtons and it points at 93o measured counter clockwise from the positive x-axis. What is the y component (in newtons) of F.
The generator at a power plant produces AC at 24000 V. A transformer steps this up to 345,000 V for transmission over power lines. how many turns must there be in the output coil
Two equal charges Q are positioned at points (x=l, y=0) and (x=-1, y=0).Find where the field is a maximum. define your answer in terms of the variables , , and appropriate constants. If there is more than one answer, separate them by a comma.
Calculate the maximum value of resistance that can be obtained by combining resistors of 34 Ohms , Calculate the minimum value of resistance
If Cassie's near point is 110 cm, what's the power of the glasses if it helps her gain back the normal near point
A near-sighted person might correct his vision by wearing diverging lenses with focal length f = -40cm. Use ray tracing to determine the height of the image
A mass-spring system oscillates with an amplitude of 3.50 cm. If the spring constant is 241 N/m and the mass is 434 g, Determine the maximum speed of the object
A rectangle has an area of 33.66 cm2. When both the length and width of the rectangle are increased by 1.30 cm, find the length of the shorter of the two sides of the initial rectangle
Find the acceleration of a forklift of mass 1400 kg pushed by a force of 2100 N that is opposed by a frictional force of 425 N.
Sally travels by car from one city to another. She drives for 24 min at 63.0 km/h, 52.0 min at 42.0 km/h, and 18.0 min at 81.0 km/h, and she spends 5 min eating lunch and buying gas.
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