As an admirer of Thomas Young, you perform a double-slit experiment in his honor. You set your slits 1.15 mm apart and position your screen 3.67 m from the slits. Although Young had to struggle to achieve a monochromatic light beam of sufficient intensity, you simply turn on a laser with a wavelength of 641 nm . How far on the screen are the first bright fringe and the second dark fringe from the central bright fringe? Express your answers in millimeters.
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A block of mass M is hanging from a rope of length L. You throw a ball of clay of mass m towards the block. The clay hits the block along the horizontal axis with a speed v, and proceeds to stick to the block. The block and clay swing up to a maximum height h. Find h.
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A 6.0 - m long rod has a mass of 1⁄3kg. Its moment of inertia from an axis at one of its end is (in kg. m2)
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A 25.0-kg crate is initially at rest at the top of a ramp that is inclined at an angle θ = 30.0 ◦ above the horizontal. You release the crate and it slides 1.25 m down the ramp before it hits a spring attached to the bottom of the ramp. The coefficient of kinetic friction between the crate and the ramp is 0.400 and the constant of the spring is k = 5000 N/m. How far does the crate compress the spring?
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How does the magnitude, sign, and rate of change of the magnetic flux, and the number of turns in the secondary affect the induced emf? In an experiment of Moving a permanent magnet AND an electromagnet in and out of a pickup coil and seeing the brightness or voltage.
Relating to Faraday's Law
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A ball is launched from the ground at an angle of 65∘ above the horizontal with a velocity of 22m/s. The ball hits the ground some distance away at a given speed, and bounces back up. When it does so the amplitude of both the x and y components of its velocity are half what they were. This repeats with the ball losing half of it’s speed on each bounce.
a) Sketch the problem.
b) Write the equation of motion (position as a function of time) for the x- and y-directions and identify all known quantities.
c) At which position, (x,y), is the ball when it lands on the ground for the first time?
d) How many times will the ball bounce before the maximum height of its trajectory is less than 1m.
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Problem 3.29 A shot-putter throws the "shot" (mass = 7.3 kg ) with an initial speed of 14.5 m/s at a 37.0 ∘ angle to the horizontal. |
Part A Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.15 m above the ground. Express your answer using three significant figures and include the appropriate units.
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Your task is to place your spacecraft in circular orbit about
Mars with an orbital period of 8 hours and 40 minutes. The mass of
Mars is 6.45 x 1023 kg, and the radius of Mars is 3394 km. What
will be the radius of your circular orbit?
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In the production of radiopharmaceuticals, how is the radioisotope produced? and how is a 'radiopharmaceutical' formed from that radioisotope? What does the radioisotope get attached to in order to become a radiopharmaceutical?
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How much work did the movers do to push a 47.0 kg crate 10.2 m across a rough floor at a speed of 2.2 m/s with a horizontal pushing force of 58 N ?
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The diagram shows an isolated, positive
charge Q, where point B is twice as far away
from Q as point A.
+Q ____A____ B
0 10cm 20cm
What is the ratio of the electric field
strength at point A to the electric field
strength at point B?
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Starting from rest, a car accelerates at 3m/s2 until it reaches a constant speed of 15m/s. After traveling at 15m/s for 12s, the brakes are applied so that the car comes to a stop, taking 3 s to do so. (Please show formulas)
A. Prepare visual overview of the situation. Your overview must include a pictorial representation that defines the coordinate system, a motion diagram, and an annotated velocity vs. time graph.
B.What total distance did the car travel?
C. The magnitude of the braking force required to bring the car to a stop was 2000N . What is the mass of the car?
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A springboard diver jumps up and comes back to the level of the board after 0.81 s. What was her speed as she leaves the board? How high (above the board) did she reach? A toy rocket stops accelerating when it reaches a height of 30 m. Its speed is 30 m/s at this point and continues upward. Take time to be zero at this point. (a) How fast is it moving when it is at a height of 40.0 m? (b) How much time is required from t = 0 to reach this height? (c) Why are there two answers to (b)?
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- Comparer a typical CT radiation dose to that of a planar x-ray and explain why there is a difference?
The question is asking for a comparison between CT radiation and X-ray ( planner) !!
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