a classroom has 70% floor reflectance and 70% of wall reflectance. the room's floor cavity ratio is 1.5. how much is the room's effective floor reflectance?
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a classroom has 70% floor reflectance and 70% of wall reflectance. the room's floor cavity ratio...
A modern cabin has a concrete floor that is 4.00 cm thick. A roaring | fire keeps the interior of the cabin at 21.0 °C while the air temperature below the cabin is 2.75 °c. How much heat is lost through the concrete floor in one evening (4 hrs) if the cabin measures 4.00 m by 8.00 m? A styrofoam wall (used for insulation) has a thickness of 25.4 mm. The temperature on one side of the wall is 5.50...
A 5.0-m-long ladder leans against a wall at 4.0 m above a cement floor. The ladder is uniform and has mass m-15.0 kg. Assume the wall is frictionless, but the floor is not. When the ladder is in equilibrium, please find 1. how many forces apply to the ladder? 2. the two conditions for ladder in equilibrium (math expression)? 3. the force Fw that the wall exerts to the ladder 4. the force Fo that the floor exerts to the...
Ch 25 Q 8 Go.) Problem A small mirror is attached to a vertical wall, and it hangs a distance of 1.86 m above the floor. The mirror is facing due east, and a ray of sunlight strikes the mirror early in the morning and then again later in the morning. The incident and reflected rays lie in a plane that is perpendicular to both the wall and the floor. Early in the morning, the reflected ray strikes the floor...
A horizontal force of 70 N is required to push a bookcase across a floor at a constant velocity. Part A What is the net force acting on the bookcase? Express your answer to two significant figures and include the appropriate units. Part B How much is the friction force that acts on the sliding bookcase? Express your answer to two significant figures and include the appropriate units. Part C How much friction acts on the bookcase when it is...
e susJrom rest at the top of the well and falls for before hitting the water, how far does it fall? Moment of inertia of cylinder 1-% MR 2. A ladder is leant against the wall. The coefficient of the static friction p. between the ladder and the wall is 0.3 and the coefficient of the static friction g, between the ladder and the floor is 0.4. The center of mass of the ladder is in the middle of it...
Part A 1.2 kg book-lying on a 0 70 mHgh tati above the floor Duringi process,how much work doos grevity do on the book Express your anawer to two significant figures and inelude the K-1 Value Units Submit Part uring tis pross, bow much work does your hand do on the book? Express your anwwer to two significan nand inslude the W Value Units
The Maurer Company has a long-term debt ratio of .70 and a current ratio of 1.10. Current liabilities are $950, sales are $5,170, profit margin is 9.40 percent, and ROE is 16.90 percent. What is the amount of the firm's net fixed assets?
. A granite wall has a thickness of 0.50 m and a thermal conductivity of 2.1 W/(m · C°). The temperature on one face of the wall is 5.2 °C and 20.0 °C on the opposite face. How much heat is transferred in one hour through each square meter of the granite wall?
12. A grocery store has 1200 square feet of floor space. Then the store buys the neighboring building and expands its floor space by 50%. The following year, the store rents space in the next building and increases its floor space by another 25%. After the two expansions, how much floor space does the grocery store have? (1 point)
2.) A plane wall is made of brick with a thermal conductivity of 1.5 W/(m-K). The wall is 20 cm thick and has a surface area of 10 m2. One side of the wall is exposed to outside air blowing against the wall resulting in a heat transfer coefficient of 20 W/(m2-K). The other side is exposed to an air-conditioned room with a convective heat transfer coefficient of 5 W/(m2-K). a. What are the thermal resistances corresponding to conduction through...