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The electric field just above the surface of the earth has been measured to be 163 N/C downward. What total charge (sign and magnitude) on the earth is implied by this measurement?
A toroidal shaped magnetic material of radius, a, and cross sectional radius R has a small transverse gap cut into it of length l. The toroid is uniformly overwound with a coil of N loops carrying a current I. Show that for a ferromagnetic materia..
A column of soldiers, marching at 133paces per minute, keep in step with the beat of a drummer at thehead of the column. What is the approximate length of the column
Consider the nuclear reaction: (2/1)H + (9/4)Be --> (7/3)Li + (4/2) He. How much energy is liberated
A 21.0-kg box rests on a frictionless ramp with a 14.3° slope. The mover pulls on a rope attached to the box to pull it up the incline. If the rope makes an angle of 38.4° with the horizontal, what is the smallest force F the mover will have to exert..
A 3440-kg spacecraft is in a circular orbit a distance1850 km above the surface of Mars. How much work must thespacecraft engines perform to move the spacecraft to a circularorbit that is 4360 km above the surface?
A propeller is modeled as five identical uniform rods extending radially from its axis. The length and mass of each rod are 0.793 m and 2.97 kg, what is its rotational kinetic energy
The spring constant for the tendon is the equal for both groups, 33. What is the difference in highest stored energy between the sprinters and the non athletes?
A voltage source given by v=100sin(754t) is connected in series to a 20(ohms) resistor, a 0.1x10^-6 uF capacitor and 4x10^-3 henries inductor. What is the frequency of the source
A soccer player kicks a ball from ground level with a velocity of 23.5 m/s 38.20 above the horizontal and it lands at ground level. determine the "hang time" of the ball
A horizontal light ray is incident on a plate glass prism, where ? = 28.5°. Calculate the angle of deviation ? of the ray --- the angle that the ray emerging from the prism makes with the incident ray. (in deg) A: 1.58×101 B: 2.10×101 C: 2.80×101 D: ..
If you connect these 3 resistors in series across a variable emf source of negligible internal resistance, what is the largest potential difference this emf source can be set to without damaging any of resistors.
A 1300 kg car and 4940 kg truck undergo a perfectly inelastic collision. Before the collision, the car was traveling southward at 1.35 m/s, and the truck westward at 9.40 m/s. Find the velocity of the wreckage immediately after the collision. (Enter ..
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