Does a flat mirror produce a real or virtual image? What is its magnification?
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A block of mass m1=4.00 kg moves on the surface of a horizontal table. The coefficient of kinetic friction between the table top and m1 is equal to 0.350. Block 2 of mass m2=2.00 kg is tied to m1 via a string that passes over a frictionless, massless pulley. The two blocks start from rest and m2drops by a distance L=1.75 m to the floor.
Calculate the net work Wnet done by all the forces acting on the system
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An object that weighs 1180 N rests on a lever at a point 0.370 m from a support. On the same side of the support, at a distance of 3.00 m from it, an upward force with magnitude F is applied. Ignore the weight of the board itself. If the system is in equilibrium, what is F? Express your answer in Newtons. where P = 1180 and x = 0.370. N
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what are the classical explanation and quantum explanation for the existence of the fringe pattern?
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A) Three equal charges 6.3 ?C are located in the xy-plane, one at (0 m, 51 m), another at (56m,0m),and the third at(57m,?66m).
Find the magnitude of the electric field at the origin due to these three charges. The value of the Coulomb constant is 8.98755
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A block with mass mA = 15.0 kg on a smooth horizontal surface is connected by a thin cord that passes over a pulley to a second block with mass mB = 6.0 kg which hangs vertically.
Determine the magnitude of the acceleration of the system.
Express your answer to two significant figures and include the appropriate units.
If initially mA is at rest 1.250 m from the edge of the table, how long does it take to reach the edge of the table if the system is allowed to move freely?
Express your answer to two significant figures and include the appropriate units.
If mB = 1.0 kg, how large must mA be if the acceleration of the system is to be kept at g100?
Express your answer to two significant figures and include the appropriate units.
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Two small forward-facing speakers are 2.50 m apart. They are both emitting, in phase with each other, a sound of frequency 1100 Hz in a room where the speed of sound is 344 m/s. A woman is standing opposite the midpoint between the speakers and is initially 35.0 m from the midpoint. As she slowly walks parallel to the line connecting the speakers, at what angle θ (relative to the centerline coming outward from the midpoint between the speakers) will she first hear no sound?
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Q2) A 400-gram package lying on a horizontal surface is attached to a horizontal string which passes over a smooth pulley. When a mass of 200 grams is attached to the other end of the string, the package is on the point of moving. Find μS, the coefficient of static friction
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Where there are multiple forces acting on the same object, draw a free-body diagram (i.e a diagram where each vector for each of the different forces is shown): A book on a table has a coefficient of static friction of 0.1 and a coefficient of kinetic friction of 0.05. The book has a mass of 1kg. The table has a length of 3m. Suppose you gently tilt the table until the book starts to slip and then leave the angle of the book at that critical angle afterwards. How long will it take the book to slide to the end of the table?
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Question C A spacecraft for extrasolar travel uses a sail to reflect light back toward the sun. At earth’s orbit the sunlight has an intensity of 1368 W/m2. The spacecraft has a mass of 2000 kg. a) [8] Determine the required sail to achieve an initial acceleration of the 9.8m/s2 b) [2] if it were black rather than reflective what would the initial acceleration be? Question D [8] Show that the units on the right side of eq 22-27 are those expected for c |
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An electron and a positron are located 17 m away from each other and held fixed by some mechanism. The positron has the same mass and the same magnitude of charge as those of the electron, but its charge is positive. The electron and the positron are released at the same time by the mechanism. The electron and the positron begin to speed up towards each other. What velocities should they have when they are 1.3 m away from each other?
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QUESTION 1:
Two point masses are the same distance R from an axis of rotation and have moments of inertia IA and IB.
(a)
If IB = 4IA, what is the ratio
| mB |
| mA |
of the two masses?
| mB |
| mA |
=
(b)
In terms of R, at what distance from the axis of rotation should mass A be placed so that
IA = IB?
R
QUESTION 2:
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 230 N applied to its edge causes the wheel to have an angular acceleration of 0.980 rad/s2.
(a) What is the moment of inertia of the wheel?
kg · m2
(b) What is the mass of the wheel?
kg
(c) If the wheel starts from rest, what is its angular velocity
after 4.60 s have elapsed, assuming the force is acting during that
time?
rad/s
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Apply the Pauli exclusion principle to determine the number of electrons that could occupy the quantum states described by the following.
a) n = 4, ℓ = 3, mℓ = −2
b) n = 4, ℓ = 2
c) n = 4
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Your 300mL cup of coffee is too hot to drink when served at 90.0 ∘C.
A)What is the mass of an ice cube, taken from a -16.0 ∘C freezer, that will cool your coffee to a pleasant 58.0 ∘?
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