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You are an engineer in charge of designing a new generation of elevators for a prospective upgrade to the Empire State Building. Before the state legislature votes on funding for the project, they would like you to prepare a report on the benefits of upgrading the elevators. One of the numbers that they have requested is the time it will take the elevator to go from the ground floor to the 102nd floor observatory. They are unlikely to approve the project unless the new elevators make the trip much faster than the old elevators. If state law mandates that elevators cannot accelerate at greater than 2.70 m/s2 or travel faster than 15.3 m/s, what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor?
question1two blocks are associated by a light string that passes over a frictionless pulley. the block of mass m1 lies
A car is driving directly north on the freeway at a speed of 117 km/h and a truck is leaving the freeway driving 76 km/h in a direction that is 40° west of north
24.0g of copper pellets are removed from a 300 ? C oven and immediately dropped into 120mL of water at 24.0 ? C in an insulated cup. What will the new water temperature be
Four identical metallic objects carry the following charges: +1.68, +6.03, -4.64, and -9.66C. How many electrons (or protons) make up the final charge on each object
The Position of the object (wire gauze) on the meter stick is at the 5.00 cm mark. What is his value for the focal length of the lens
An airplane is flying in a jet stream that is blowing at 45.0 m/s in a direction 18° south of east, What is the airplane's speed relative to the earth
A 400-W immersion heater is placed in a pot containing 2.0 litters of water at 20 C.(a) how long will it take to bring the water to boiling temperature assuming that 80% of the available energy is absorbed by the water?(b) how much longer will it tak..
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. find the angular speed of the neutron star
a super-particle travels forward along a straight cylindrical tube at 1000 m/s for 10 m, What is the average velocity
An 0.82 kg bucket full of water is being swung by a rope in a vertical circle of diameter 2.31 m. Compute the least speed a bucket must be moving so that the water doesn't fall out.
The Big Bang theory states that the beginning of the universe was accompanied by a huge burst of photons. Calculate the peak wavelength of this radiation
when a 0.350 kg mass is hung on the end of a spring, the spring is observed to stretch by an amount of 12.0 cm in coming to a new equilibrium position. what is the force constant of the spring?
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