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A block of ice with mass 2.00kg slides 0.750m down an inclinedplane that slopes downward at an angle of 36.9 degrees belowthe horizontal. If the block of ice starts from rest, what is its final speed? (ignore friction)
A thin, horizontal, 10-cm-diameter copper plate is charged to 3.5nC. If the electrons are uniformly distributed on the surface, what are the strengths and direction of the electric field
A car makes a trip due north for three-fourths of the time and duesouth one-fourth of the time. The average northward velocity has amagnitude of 33 m/s, and the averagesouthward velocity has a magnitude of 20 m/s. What is the average velocity (magnit..
An ac generator with a frequency of 29.4 Hz and an rms voltage of 12.0 V is connected to a 49.5-µF capacitor. What is the maximum current in this circuit?
What is the frequency heard by a person driving 79.17 km/h toward a blowing factory whistle (f = 506.77 Hz) is the air temperature is 21.5 oC
Explain how the process of "doping" a semi conductor can improve its overall efficiency. Why does "doping" require a clean room infrastructure
a car with a mass of 2000 kg is traveling at 20 m/s. how much kenetic energy in joules does the car have? how much heat must be dissipated to stop the car
What average force is required to stop an 1100-kg car in 8.0 seconds if the car is traveling at 95 km/h
Two particles each have a mass of 7.00 10-3 kg. One has a charge of +5.0 10-6 C, and the other has a charge of -5.0 10-6 C. How fast is each particle moving when the separation between them is one-half its initial value
A 130kg astronaut (including space suit) acquires a speed of 2.55m/s by pushing off with his legs from a 2000kg space capsule. What is the change in speed of the space capsule
The speed of sound in air is 332 m/s at 0°C. It increased 0.60 m/s for each degree above zero. compute the speed of sound at the temperature of the room.
A cyclist pedals a bicycle. The driving wheel accelerates from the rest to an angular speed of 6.4 rev/s in 3.8 revolutions. What is the angular acceleration of the wheel
A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than the other. find the distance (in m) between the cliffs
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