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A sort of "projectile launcher" is shown in Fig. 20-65. A large current moves in a closed loop composed of fixed rails, a power supply, and a very light, almost frictionless bar touching the rails. A magnetic field is perpendicular to the plane of the circuit. The bar has a L = 20 cm, a mass of 1.8 g, and is placed in a field of 1.7 T. I wrote my knowns and unknowns but I'm lost on what formulas to use.
A 0.525 kg ball starts from rest and rolls down the hill with uniform acceleration, travelling 150 m throughout the second 10.0 rm s of its motion.
A wooden block with mass 1.15kg is placed against a compressed spring at the bottom of a slope inclined at an angle of 28.0?, Calculate the amount of potential energy that was initially stored in the spring
The plate on the back of a certain computer scanner says that the unit draws 0.44A of current from a 120V , 60Hz line. Find the root-mean-square current
An electron is moving at a speed of 1.0 x10^4 m/s in a circular path of radius of 2.1cm inside a solenoid. The magnetic field of the solenoid is perpendicular to the plane of the electron's path. The solenoid has 25 turns per centimeter.
A 0.15-kg of aluminum contains 0.2 kg of water. Initially, the water and the cup have a com- mon temperature of 18 0C, find the specific heat capacity of the unknown material
The E string of a violin has a lenght of 0.33 m and a fundamental frequencynof 659 Hz. The tension of the string is 55N, What is the wave velocity of the string
How much work done against force of gravity
It can be shown that asin(theta) + bcos(theta), where ab is not = 0, is a circle. Find the center (in Cartesian Coordinates) and the radius of the circle in terms of a and b
As you zip through space in your PPS (personal propulsion suit), your pulse rate, as you count it, is 115 bpm, How fast are you moving with respect to the Moon
A train at a constant 75 km/h moves east for 48 min, then in a direction 61.0° east of due north for 11min, and then west for 67 min.
Two scales on a voltmeter measure voltages up to 20.0 V and 28.0 V, respectively. Determine the coil resistance
An electron is observed traveling at a speed of 25.7·106 m/s, How far will the electron travel before coming to a stop
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