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A proposed bridge on the interstate highway system is being considered at the cost of 3 million dollars. It is expected the bridge will have a life of 30 years. Construction costs will be paid by government agencies. Operation and maintenance costs are estimated to be 180,000 per year. Benefits to the public are estimated to be 900,000 per year. The building of the bridge will result in an estimated cost of 250,000 per year to the general public. The project requires a return of 10 percent.
Suppose the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you found in part A. Illustrate what should be the maximum speed of the car so it can round the curve safely?
A test tone used on a radio has a frequency of 987 Hz. What is the wavelength of this sound in air at normal room temperature 20oC
A girl is floating in a freshwater lake with her head just above the water. If she weighs 610 N, what is the volume of the submerged part of her body?
A drag racer, starting from rest, speeds up for 402 m with an acceleration of +21.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.75 m/s2. How fast is the racer moving 2.90 102 m after the parachute opens?
A boy tosses a coin straight up to2.4 m. Assume the height when the coin leaves his hand is 1.0 m. What was the initial speed of the coin when it left his hand?
A physics professor is pushed up a ramp inclined upward at an angle 31.0 above the horizontal as he sits in his desk chair that slides on frictionless rollers. The combined mass of the professor and chair is 90.0 . He is pushed a distance 2.85along t..
q1. sphere pendulum has mass of 1.5 kg attached to a cord length of 11.5 m sphere is released from rest while cord
what thickness of copper will be deposited if one ampere current is allowed to pass through for 100 minute ,
You see the boy next door trying to push a crate down the sidewalk. He can barely keep it moving, and his feet occasionally slip. Estimate the mass of the crate
Ten boxes, each 28.0 cm high and weighing215 N, initially are all side by side onthe floor. The boxes are lifted and placed in a vertical stack2.80 m high in a time interval of5.50 s. Compute the power necessary tostack the boxes.
why do you only report 2 sigfigs when calculating freezing point
A 14.8 kilogram monkey hangs from a cord suspended from the ceiling of an elevator. Find the elevator minimum acceleration at which the cord breaks
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