(a) the number of binary links, (b) the number of ternary links, (c) the number of total links, (d) the number of loops, (e) the number of joints and pairs, and (f) the number of degrees of freedom.
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- Suppose that we observe that protons produced by an accelerator travel in a circular path of radius 8 cm in a uniform magnetic field whose magnitude is 3 T. What is the speed of these protons? Give your answer in units of 106 m/s.How do you solve the second question? When I use the basic equation B = (magnetic constant)*(current) / (2*R) it does not seem to yield the correct answer (which is supposed to be (b))Using the Ampere's circuital law, determine the magnetic field intensity H at a distance r from a wire conducting a current I [A]. Let I = 5 [A]. I [A] r →P
- Assume for simplicity that the Earth’s magnetic north pole is at the same location as its geographic north pole. If you are in an airplane flying due west along the equator, as you cross the prime meridian (0° longitude) facing west and look down at a compass you are carrying, you see that the compass needle is perpendicular to your direction of motion, and the north pole of the needle dipole points to your right. As you continue flying due west, describe how and why the orientation of the needle will (or will not) change.A homogeneous pulley with two grooves consists of two wheels which turn together as one around the same axis. The moment of inertia of the two wheels together is ICM = 40 kg m2. The radii are: R1 = 1.2 m and R2 = 0.4 m. The masses that hang on both sides of the pulley are m1 = 36 kg and m2 = 12 kg. We will assume that the masses of the ropes are negligible. Determine the angular acceleration of the pulley, acceleration of the masses, and the tensions of the ropes.How far from the starter cable of a car, carrying 150 A, must you be to experience a field less than the Earth’s (5.00×10−5T)? Assume a long straight wire carries the current. (In practice, the body of your car shields the dashboard compass.) I know that the answer is--- 0.600m But how can I check my work to make sure it is the right answer?
- Please help with 32 31 The commutator of a 1.5 hp, 2-pole, 3000 r/min de motor has a diameter of 63 mm. Calculate the peripheral speed in feet per minute and in miles per hour. 32 The following information is given on the brushes used in the motor of Problem 31: number of brushes: 2 current per brush: 15 A brush dimensions: 5/8 in wide, 5/16 in thick, 3/4 in long. (The 5/16 in × 5/8 in area is in contact with the commutator.) resistivity of brush: 0.0016 Q brush pressure: 1.5 Ibf brush contact drop: 1.2 V coefficient of friction: 0.2 Calculate the following: a. The resistance of the brush body in ohms b. The voltage drop in the brush body c. The total voltage drop in one brush, including the contact voltage drop d. The total electrical power loss (in watts) due to the two brushes e. The frictional force of one brush rubbing against the commutator surface (in Ibf and in newtons) f. The frictional energy expended by the two brushes when the commutator makes one revolution (in joules) g.…Derive an expression for the current in a system like shown, under the following conditions. The resistance between the rails is R , the rails and the moving rod are identical in cross section A and have the same resistivity ρ .The distance between the rails is l, and the rod moves at constant speed v perpendicular to the uniform field B . At time zero, the moving rod is next to the resistance R .(a) (b) (c) All loops are identical and carry the same current. (Use only the symbols > or =, for example a = b > c). Rank the magnitudes of the net forces acting on the rectangular loops shown below, from highest to lowest. Rank the magnitudes of the net torques acting on the rectangular loops shown below, from highest to lowest.
- The figure below shows a rectangular coil of length { and width w consisting of N turns of conducting wire, moving to the right with a constant velocity v. The coil moves into a region of uniform magnetic field B, pointing into the page and perpendicular to the plane of the coil. The total resistance of the coil is R. Find the magnitude and direction of the total magnetic force on the coil for the following situations. (Use the following as necessary: N, B, w, e, v, and R.) (a) as it enters the magnetic field magnitude F = direction ---Select-- (b) as it moves within the field magnitude F = direction ---Select--- (c) as it leaves the field magnitude F = direction Select-- Directions are - to the left, to the right, upward, downward, into the page, out of the page, the magnitude is zero.Consider the seven current-carrying wires and the four closed paths shown in the figure. For each of these paths (C1, C2, C3, and C4) determine the following in terms of ?0. Use standard sign convention for the currents; minus is down into the page and positive is up out of the page. (Assume I1 = 2.00 A, I2 = 2.00 A, I3 = 5.00 A, I4 = 6.00 A, I5 = 5.00 A, I6 = 6.00 A, and I7 = 7.00 A.)A straight conductor of fixed length I is moving at 45 degrees to a uniform magnetic field of strength B with constant speed v. Calculate v, if B=7.4 T, I=2 m and electromotive force e =5 V. Give your answer in SI units.