A pirate uses a thin lens with f=10cm to image his parrot:
a) if the parrot is 6cm from his lens describe the image the pirate sees and its magnification. Draw a ray diagram.
b) if the parrot moves to 18cm from the lens, determine the image distance, transverse magnification, and describe the image. Draw a ray diagram.
c) if the parrot's beak is 1cm long, what is the longitudinal magnification observed if the imaging conditions are those described in part b? Assume the beak is pointing straight at the lens.
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To construct an oscillating LC system, you can choose from a 9.7 mH inductor, a 4.7 μF capacitor, and a 2.3 μF capacitor. What are the (a) smallest, (b) second smallest, (c) second largest, and (d) largest oscillation frequency that can be set up by these elements in various combinations?
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In 1942, Nikola Tesla, a Serbian-American inventor, electrical engineer, mechanical engineer, physicist, said: "If you want to find the secrets of the universe, think in terms of energy, frequency and vibration."
Your reflection should be based on your knowledge of waves that you have gained in this module in relation to this quote; the reflection should be scientific in nature and not purely philosophical. Your initial post should be between 150 and 200 words in length.
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1. A block of mass m attached to a spring with spring constant k oscillates horizontally on a frictionless table. Its velocity is 20 cm/s when x = -5 cm. Taking m = 100 gm, and spring constant = 2.5 N/m,
a) Find out the equations of position, velocity, and acceleration of the ball. Find also the total energy of the block when its velocity was 20 cm/s.
b) Oscillating particles generate waves. What will be the equation of a wave generated by an oscillation from part (a), that is travelling with a speed of 5 m/s with a frequency of 100 Hz? The wave has 2.0 cm between the top of the crests and the bottom of the troughs. Is the wave making an audible sound?
c) If the wave in part b) was travelling through a 2 m long string held at a tension of 10 N, what would be the mass of the string?
d) If the set-up of part a), i.e., the source of the wave moves away with a speed 20 m/s, what will be the frequency of the wave generated?
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The motion of a particle is given by x = A sin3(ωt).
(a) Enter an expression for the amplitude of the particle's motion.
(b) Enter an expression for the particle's velocity, v.
(c) Enter an expression for the particle's acceleration, a.
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a) What is the equation of motion that governs the physics behind sound production in your speaker? Discuss what each term in this equation of motion relates to in your speaker.
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In a high jump competition: What would be the maximum height an athlete could jump using a pole? Find out what the world record is and compare with its result. Does your reasoning allow you to understand why a good pole vaulter has to be a very fast runner? Can your method be applied to estimate maximum height in a pole vault high jump competition? Why can you jump higher with the pole than without it? The figure shows the jump by the time the athlete reaches maximum height and is passing over the bar.
* The figure is not available
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5. An electron moves to the right, entering a region that has a uniform electric field directed at you. The direction of the force perceived by the electron is:
a. down
b. up
c. on the right
d. towards you
e. None of the above
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Two point charges, Q1=−36μC and Q2=49μC, are separated by a distance of 12 cm. The electric field at the point P is zero.
How far from Q1 is P?
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Describe the fuel for proposed thorium reactors, its availability, processing. Describe the fuel for proposed thorium reactors, its availability, processing.
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explain the differences and similarities between classical and relativistic Electrodynamics.
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QUESTION 1
How long? How much time in seconds does it take for the sled to go down part of a hill?
A sled with a total mass of 671 kilograms is going down a straight part of a hill where the angle of incline is 10.6 degrees.
The length of the straight part of the hill is 76.4 metres.
The speed of the sled at the top of the hill is 4 meters per second.
The combined forces of friction = the total friction including air drag and sliding friction = 43 newtons.
How much time does it take for the sled to travel down the straight part of the hill?
Note that the initial speed is NOT zero and so you will have to solve a quadratic equation to get your answer.
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An astronaut wants to find out his mass while in orbit, to find
out if he is staying healthy while in space. Since he can't use a
bathroom scale (why not?), he attaches himself to a spring
(k=2500 N/m), pulls himself back from the spring's equil length by
5 m, and times one oscillation to take 1 s.
a.) What is the mass of the astronaut?
________ kg
b.) Find the potential energy stored in the spring
when it is furthest from its equilibrium length.
____________J
c.) Find the speed of the astronaut when he passes
through the spring's equilibrium.
____________m/s
d.) If he started at a displacement from
equilibrium of 6 m instead, how long would one oscillation take
now?
____________s
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explain the differences and similarities between classical and relativistic mechanics.
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