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a. What is the direction and magnitude of an electric field that supports the weight of a free electron near the surface of Earth?
b. Discuss what the small value for this field implies regarding the relative strength of the gravitational and electrostatic forces.
The minimum distance required to stop a car moving at 38.0 mi/h is 41.0 ft. What is the minimum stopping distance for the same car moving at 68 mi/h, suppose the same rate of acceleration.
A person pulls on a 50kg desk with a 200 N force acting at a 30 degree angle above the horizontal. The desk does not budge.
Knowing that the actual speed of light is approximately 3.00x108m/s determine the actual time discrepancy in Io's eclipse
q1. in a photoelectric effect experiment 325 nm photons strike a cathode that has a work function equal to 1.25 ev.
A person takes in a breath of -2 degrees C air and holds it until it warms to 37.5 degrees C. Determine the work done by the air on the lungs
If you were to pluck the wire at the center, what will be the dominant frequency of the sound produced (fundamental frequency)? (assume tension is provided by the 100 kg mass) Where should you pluck the wire to achieve third harmonic(second overto..
The wavelength of visible light ranges from 400 to 700. Find the ranges of this light's angular frequency and Find the ranges of this light's wave number
I understand how one can obtain a -ve ρ by constructing a solid-solid system with vastly different speeds of sound? How is metamaterials not an existing tag?
That is the sound from the organ bounces back and forth off the church walls many times before the sound inentsity decays away completely. If the reverberation time is 10s and the church has the approximate shape
A math instructor's dead body (m= 80 kg ) is dragged across the ground with 30o and 500 N force by an angry student. The coefficient of friction among the lifeless body and the ground is µk = 0.60 What is the acceleration of the dead body?
The most intense beam of light that can propagate through dry air must have an electric field whose maximum amplitude is no greater than the breakdown value for air: Eair max = 3.0 x 106 V/m, Calculate the intensity of this wave
What is the final temperature reached by the addition of 11.4 grams of steam at 100°C to 681 grams of water at 25°C in an aluminum calorimeter having a mass of 781 grams.
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