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A driver travels northbound on a highway at a speed of 25.0m/s. A police car, travelling southbound at a speed of 40.0 m/s,approaches withits siren sounding at a frequency of 2,500 Hz. What frequency does the driver observe as the police car approaches?
Two spheres are launched horizontally from a 1.2 -high table. Sphere is launched with an initial speed of 4.5. What is the time for the sphere to hit the floor
On October 9, 1992, a 27-pound meteorite struck a car in Peekskill, NY, leaving a dent 22 deep in the trunk. what was the magnitude of its deceleration
A camera requires 5.2J of energy for a flash lasting 1.0 ms. What power does the flashtube use while it%u2019s flashing
what is the specific enthalpy of saturated steam at a temperature of 464 degrees F? If you have 75 lbs of this steam, what is the total volume
Animals in cold climates often depend on two layers of insulation: a layer of body fat [of thermal conductivity 0.200W/(m dot K) ] surrounded by a layer of air trapped inside fur or down. We can model a black bear (Ursus americanus) as a sphere 1...
The image of a tree on a 35 mm color slide is 1.7 mm high. It is to be projected onto a screen 8.0 m from the slide, and is to appear 559 mm high. What is the magnification of the system
A diffraction grating is made up of slits of width 290 nm with separation 910 nm. How many maxima are there in the full diffraction pattern
A cylindrical 98.50 ? resistor is made from a coil of copper wire whose total mass is 74.0 g, What is the diameter and lenght of the wire
Lenses
A rural mail carrier leaves the post office and drives 22 km in a northerly direction. She then drives in a direction 60.0 Deg south of east for 47 km
A drinking straw 20 cm long and 3 mm in diameter stands vertically in a cup of juice 8.0cm in diameter. A section of straw 6.5cm long extends above the juice. A child sucks on the straw, and the level of juice in the glass begins dropping at 0.23c..
A large, cylindrical roll of tissue paper of initial radius R lies on a long, horizontal surface with the outside end of the paper nailed to the surface. Determine the speed of the center of mass of the roll
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