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1) you ar charged to work on reducing expenditures for a company.you think that the company can save considerable money on fuel costs by lowering the room temperature of the building for daily use. In the morning, the interior temperature is typically 37.6°F and the thermostat is typically set for 70.7°F. Instead, you propose to lower the thermostat to 60.1°F. Currently the building measures 23.5 × 24.3 × 14.5 feet. How much heat will be saved each morning by bringing the building up to the new operating temperature of 60.1°F instead of 70.7°F? Ignore heat and air losses to the outside and consider air an ideal diatomic gas. Assume that in the morning the pressure in the room is atmospheric. Express your answer as a positive quantity
2) The electricity rate is $2.56 per kilowatt-hour. How much money (in dollars) is saved each morning by only heating the room to the new operating temperature?
How much sound power will strike the eardrum of an airport worker 15.3 m from the aircraft? (Use 1.9 10-2 m as the diameter of the ear.)
A ship sets out to sail to a point 212 km due north. An unexpected storm blows the ship to a point 156km due east of its starting point. How far must it now sail to reach its original destination.
Calculate the centripetal force on the motorcycle.
A baseball (m = 137 g) approaches a bat horizontally at the speed of 40.6m/s (91 mi/h) and is hit straight back at a speed of 45.1m/s (101 mi/h). If the ball is in contact with the bat for a time of 1.00 ms, what is the average force exerted on the..
The bullet remains in the block, and after the impact the block lands d = 1.5 m from the bottom of the table. Evaluate the initial speed of the bullet.
A styrofoam cooler (k = 0.030 W/(m·K)) has outside dimensions of 0.270 m by 0.230 m by 0.280 m, and an average thickness of 2.6 cm. About how long would it take for 1.60 kg of ice at 0 °C to melt in the cooler if the outside temperature is 30.0 °C..
When one person was talking in a small room, sound intensity level was 60dB everywhere within the room. Then, there were 14 people talking in similar manner at the same time in the room, what was the resulting sound intensity level.
An imaginary accelerator consists of colliding beams of electrons and protons, each of 2TeV total energy. What laboratory energy would be required to achieve the same center - of - mass energy if electrons collide with stationary protons?
A firefighter at a distance d from a burning building directs a stream of water from a fire hose at angle θi above the horizontal as shown in Figure. If the initial speed of the stream is vi. At what height h does the water strike the building?
In a college parking lot, the number of ordinary cars is larger than the number of sport utility vehicles by 85.7%, Find the number of SUVs in the lot
An airplane is flying in a horizontal circle at the speed of 542 km/h. If the wings of the plane are tilted 33.0° to the horizontal, what is the radius of the circle in that the plane is flying? Suppose that the required force is provided entirely by..
Illustrate what is the speed of the three coupled cars after the collision? How much kinetic energy is lost in the collision?
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