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if car a is moving east at a speeed of 40mph realtive to the ground and car b is moving east at 30mph relative to the ground. what is the relative speed and direction of car b as seen by an observer in car a? and of car a as seen by the observer in car b?
A proton is confined to a finite potential well ranging from 5E to 80 over a given range of -4L (less or equal to) x (less then or equal to) 0. Determine the free energy state.
Assuming frictionless conditions, a table has a hanging mass, m1, over a pulley at the left side and another hanging mass, m2, over a pulley on the right side.
A 3.5 m long, 310 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 70 kg construction worker stands at the far end of the beam.
Two speakers, one directly behind the other, are each generating a 245-Hz sound wave. What is the smallest separation distance between the speakrs
using the telephone numbers listed in your local directory as your population randomly obtain 20 samples of size 3.
a student with a mass of 80.0 kg runs up three flights of stairs in 12 s. the student has gone a vertical distance of 8.0 m. what is the student's power
Water at 25 degrees celius is pumped from 100kPa to 5MPa in a pump with an efficiency of 75%, Calulate the temperature rise in the real pump
An ideal heat-engine is to be used in an environment where the ambient temperature is 22.50 °C. What must be the minimum temperature of the hot heat reservoir in order to reach at least 46.40 percent efficiency with heat-engine? (Give the answer i..
One solenoid is centered inside another. The outer one has a length of 51.0 cm and contains 6800 coils, What is the mutual inductance of these solenoids
A black hole is roughly defined as a an object dense enough that the speed needed for launching things from its surface must be the speed of light or greater. 3.00x108m/s. Determine the maximum radius of the earth so that it might be a black hole. Th..
What mass (in grams) of steam at 100°C must be mixed with 124 g of ice at its melting point, in a thermally insulated container, to generate liquid water at 37.0°C.
A spherical brass shell has an interior volume of 1.33 x 10-3 m3. Within this interior volume is a solid steel ball that have a volume of 0.77 x 10-3 m3. what is the volume of mercury that spills out of the hole
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