Light of wavelength 600 nm passes though two slits separated by 0.25 mm and is observed on a screen 1.3 m behind the slits. The location of the central maximum is marked on the screen and labeled y = 0.
A .At what distance, on either side of y = 0, are the m = 1 bright fringes?
B.A very thin piece of glass is then placed in one slit. Because light travels slower in glass than in air, the wave passing through the glass is delayed by 5.0 ×10?16s in comparison to the wave going through the other slit. What fraction of the period of the light wave is this delay?
C. With the glass in place, what is the phase difference ??0 between the two waves as they leave the slits?
D. By how far does the central maximum move?
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An initially uncharged hollow metallic sphere with radius of 5 cm has a small object with a charge of +10 mC carefully placed at the center of the sphere through a hole in the latter's surface. With the charge in place, what charge is now present on the outside surface of the sphere? I know the answer 10uC, but do not understand how to get there. Please show work.
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You bungee jump from a point 50 [m] off the ground with a mass of 75 [kg] using a bungee cord with an unstretched length of 16 [m] and a spring constant of 55 [N/m]. Will you hit the ground and at what speed? If you will not hit the ground, how close to the ground do you come to a stop?
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Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. Assume that the Earth-Moon (center-to-center) distance is 3.82 ✕ 108 m and Earth's radius is 6.37 ✕ 106 m. (a) By what percent does the Moon's gravitational pull on you increase? % (b) By what percent does your weight (as measured on a scale) decrease?
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A pendulum consists of a stone with mass m swinging on a string of length L and negligible mass. The stone has a speed of v0 when it passes its lowest point. (a) Write an expression for the speed of the stone when the string is at some angle theta with the vertical. (b) What is the greatest angle with the vertical that the string will reach during the stone's motion? (c) If the potential energy of the pendulum-Earth system is taken to be zero at the stone's lowest point, what is the total mechanical energy of the system? State all your answers in terms of the given variables and g.
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Q.2: (i) Express ‘Uncertainty Principal’ briefly.
(ii) In the Davisson-Germer Experiment, what will be Bragg Scattering angle (first order) for an electron-beam when diffracted from the surface of Ni-crystalwith atomic-planes spacing D= 0.215 nm and the kinetic energy of the e-beam is approximately 75 eV.
iii. Qualitatively, discuss how the angle will change if the voltage is doubled.
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A solid steel sphere of radius 1.50cm and density of 8045 kg/m³ was launched on a horizontal frictionless surface. The sphere was launched using a spring gun which possessed a spring with a force constant of 35.6 N/m. The spring was compressed 30.0 cm and the sphere was launched. At the end of the frictionless surface (that was 0.955 m above the floor), the sphere rolled (no slipping) up a 25° ramp with height of 1.15m and then launched off of the ramp. The coefficient of rolling friction between the sphere and ramp was 0.0500. What was the speed of the sphere at the end of the frictionless surface (when it was sliding - not rolling) ? What was the translational speed of the sphere at the very beginning of the ramp (when it transitioned to perfect rolling (no slipping))? What was the sphere's rotational speed (in revolutions per minute) at the very top of the ramp? Ignoring drag, at what horizontal distance from the end of the ramp did the sphere strike the floor? What was the greatest height the sphere achieved (above the floor)?
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at what time stamp
where does the repeat of the exposition start in the recording of beethoven sympothy 5
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A 2.0 mm -diameter, 50 cm -long copper wire carries a 4.5 A current. What is the potential difference between the ends of the wire?
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When two waves in the same medium hit each other, the resulting displacement of the medium is
| A. Either larger or smaller than the displacement of either wave acting alone, depending on the signs of the displacements of the two waves. |
| B. Always smaller than the displacement due to either wave acting alone. |
| C. Always larger than the displacement due to either wave acting alone. |
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A ball of mass 8.1 g with a speed of 22.6 m/s strikes a wall at an angle 11.0o and then rebounds with the same speed and angle. It is in contact with the wall for 44.0 ms. What is the magnitude of the impulse associated with the collision force?
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For astronomy class, please answer this question comprehensively thank you.
We have detected a sudden minor increase in the solar wind from the Sun. The density and speed of material headed towards Earth has increased at a slow rate. Shortly before this satellites in orbit of the Sun noted a large loop of material arcing from the surface of the Sun which then fell back onto the Sun. Identify and explain what type of solar event has just been described. Are the dangers from this solar event more likely to damage satellites, ground-based power grids, and/or unprotected astronauts.
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A capacitor is connected to an ac generator that has a frequency of 3.2 kHz and produces a rms voltage of 1.3 V. The rms current in the capacitor is 29 mA. When the same capacitor is connected to a second ac generator that has a frequency of 5.1 kHz, the rms current in the capacitor is 86mA. What rms voltage does the second generator produce?
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Q. 1: (a) Write down de Broglie’s formula in terms of Kinetic Energy Ek of the particle involved.
(b) Calculate the electron’s and proton’s de Broglie wavelengths when each of them has kinetic energy 25x10-3eV.
(c) The de-Broglie wavelength of electron-beam used in the electron-microscope is 40 pico-meters. The electron-beam is accelerated from rest using potential difference Va, determine the applied voltage.
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1) What do you understand by change in the direction and change in the speed of a body?
2) What is the difference between instantaneous and average speed?
3) What differences do you find between "momentum" and momentum conservation (also indicate the units in which they are measured)?
4) What difference do you find between “a constant and a variable force” (also indicate an example of each)?
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