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Noting that a person standing in a room maintained at 20°C at all times, the inner surfaces of the walls, floors, and ceiling of the house are observed to be at an average temperature of 12°C in winter and 23°C in summer. Determine the rates of radiation heat transfer between this person and the surrounding surfaces in both summer and winter if the exposed surface area, emissivity, and the average outer surface temperature of the person are 1.6 m2, 0.95, and 32°C, respectively.
A box is sliding up an incline that makes an angle of 23.3 ° with respect to the horizontal. How far does the box travel along the incline before coming to rest
a vacuum cleaner motor can be viewed as an inductor with an inductance of 200 mh. for a 60-hz ac voltage vrms 120
You are 1.5 m tall and you are standing 2.0 m away from a flat mirror. The Top of the mirror is at the same level as the top of your head. How large is the mirror
A 0.900m -diameter vat of liquid is 2.60m deep. The pressure at the bottom of the vat is 1.40atm
A woman with mass 49.5 kg is standing on the rim of a large disk that is rotating at 0.490 rev/s about an axis perpendicular to it through its center. Calculate the magnitude of the total angular momentum of the woman-plus-disk system
A nail projects 25.0 mm horizontally outward from a wall. A 400 N picture is hung from the end of the nail, what is the diameter of the nail
An electron is traveling through a region of space in which the electric field is along the +x direction and has a magnitude of 2313 N/C. What is the acceleration of the electron? magnitude m/s2 direction
The manometer tube has an internal diameter of 0.5 cm and it is initially filled with water. Exactly 2 cm3 of an unknown liquid is then poured into one leg of the manometer, and a displacement of 5 cm between the surfaces is measured as shown. Fin..
An object of mass 2 kg and charge 40 microC is moving with initial speed of 5 m/s towards a fixed point charge of 30 microC which is fixed. Find the position of the object when it comes to rest
A refracting telescope is used to view the Moon (diameter 3480 km, distance from Earth 385,000 km). What is the diameter of the image produced by the objective
A ray of light consisting of two colors (red and blue) is incident normally on the face of a small equilateral prism. What is the distance between the two colors on the screen
A group of college students eager to get to Florida on a spring break drove the 795-mi trip with only minimum stops. How many hours did the trip take
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