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Suppose that potons are fired towards the large flat side of a positively charged conducting plate and the initial speed of the protons is v0 and the initial distance between the protons and the plate is d.
A) Draw situation
B) What is the minimum speed so that the protons will hit the plate? (Minimum implies that the initial velocity is zero)
C) How long does it take for the protons to hit the plate?
A bat at rest sends out ultrasonic sound waves at 46.9kHz, What is the received sound frequency
You have a cup containing 220 g of freshly brewed coffee which, at 75C, is too warm to drink. estimate how much the entropy of the universe increases
On Mars, where air resistance is negligible, an astronaut drops a rock from a cliff and notes that the rock falls about d meters during the first t seconds of its fall. Assuming the rock does not hit the ground first, how far will it fall during t..
A 30-meter steel tape is correct at a temperature of 20.0(C). The distance between two points, What is the true distance between the points
A car takes 9 s to go from v = 0 to v = 75 m/s at approximately constant acceleration. If you wish to find the distance travelled using the equation d = 1/2 at2, what value should you use for a.
A physics professor is pushed up a ramp inclined upward at an angle 34.0 degrees above the horizontal as he sits in his desk chair that slides on frictionless rollers, Use the work-energy theorem to find his speed at the top of the ramp
If, instead, the gold is drawn out into a cylindrical fiber of radius 1.5µm, what is the length of fiber.
Use the value of the Sun's luminosity (3.90×10^26 watts, or 3.90×10^26 joules per second) to calculate what mass of hydrogen the Sun will convert into helium during its entire main-sequence lifetime of 1.2×10^10 years.
A car takes a sharp turn on a road. Which of the following provides the centripetal force on the car? The weight of the car, frictional force, tangential acceleration, or gravitational force?
A 28.0-kg block is connected to an empty 2.46-kgbucket by a cord running over a frictionless pulley. Calculate the mass of sand added to the bucket
An incoming 40 keV photon interacts with an atom by the Compton scattering process, what is the energy of the scattered photon
a dog is walking slowly toward a motion detector. Draw a position graph that could represent this motion. Show your work.
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