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A motorcycle and a police car are moving in the same direction, with the motorcycle in the lead. The police car emits sound with a frequency of 502 Hz and has a speed of 26.5 m/s. The motorcycle has a speed of 13.0 m/s.
What frequency does the motorcyclist hear in this case?
A thin, uniform rod is hinged at its midpoint. To begin with, one-half of the rod is bent upward and is perpendicular to the other half. What is the angular velocity of the straight rod
What is the pressure change in water going from a 3.2- cm-diameter pipe to a 2.3- cm-diameter pipe if the velocity in the smaller pipe is 4.0 m/s
An 845-N sled is pulled a distance of 173 m. The task requires 1.20 x 10^4 J of work and is done by pulling on a rope with the force of 142 N. At what angle is the rope held.
A parallel-plate capacitor has a capacitance of c1 = 5.5 ?F when filled with air and c2 = 33 ?F when filled with a dielectric oil at potential difference of 12 V, Input an expression for the permittivity of the oil
Imagine a truck with a mass of 30 metric tons (t) (1 t=1,000 kg) barrelling down a highway at a speed of 50 mi/h. What is the truck's momentum in kilograms
A person in a kayak starts paddling, and it accelerates from 0 to 0.8 miles/hour in a distance of 0.8 km. If the combined mass of the person and the kayak is 80 kg, what is the magnitude of the net force acting on the kayak
A car is traveling 80 km/hr in a school zone. A police car starts from rest just as the speeder passes it and accelerates at a constant rate of 8 km/hr·s. Eluciadte when does the police car catch the speeding car?
compare the supply chain practices of two or more different companies in the same industry or similar industries.
A 82kg person sits on a 3.7kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.3cm in diameter. Find the pressure exerted on the floor by each leg of the chair
At a construction site workers need to know height of some scaffolding. Assuming acceleration due to gravity is 9.8 m/s^2 what is the height of the scaffolding
A 500-kg package slides 1.50 m down a long ramp that is inclined at 24.0 degree below the horizontal. The coeficient of kinetic friction between the package and the ramp is uk+0.310.
A helicopter lowers a rope with a seat at the end to resue someone. The seat has a mass of 4.4 kg. The person has a mass of 74.4 kg. How much tension will be on the rope
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