OC userin Physicsยท5 Sep 2019How fast must a meter stick move relative to an observer so that she would measure its length to be 9.5 cm? (Enter your answer to five significant figures.)
OC userin Physicsยท23 Nov 2019Electrical energy of approximately 1.00 1019 J is used annually in the United States. How much rest mass must be used to generate this much energy if no energy is wasted?
OC userin Physicsยท26 Feb 2019Find the potential difference through which a proton must beaccelerated to give it a final speed of 0.496c, starting fromrest.
OC userin Physicsยท20 Jun 2019A point charge +1รยตC is located at the origin. What is the fluxof the electric field of this charge through a square whose cornersare (x,y,z)=(1,1,1),(-1,1,1),(-1,1,-1),(1,1-1)? (x,y,z are in meters)
OC userin Physicsยท3 Jan 2019What is Brewster's angle, and what is the index of refraction of a material when Brewster's angle is 63 degrees?
OC userin Physicsยท26 Feb 2019A copper wire is 5.00 m long and has a cross-sectional area of 2.00 10-4 m2. This wire forms a one turn loop in the shape of a square and is then connected to a battery that applies a potential difference of 0.300 V. If the loop is placed in a uniform magnetic field of magnitude 0.600 T, what is the maximum torque that can act on it? The resistivity of copper is 1.7 multiplied by 10-8 ยท m.
OC userin Physicsยท20 Apr 2019Identical 1.8mC charges are fixed to adjacent corners of a square. What charge (mag and direction) should be fixed to one of the empty corners, so that the total electric potential at the remaining empty corners is "0" volt?
OC userin Physicsยท14 Jun 2019I don't know how to work the following problem:"The current in a resistor is given by I= (7.2A)sin(60pi t) when avoltage given by V= (240V)sin(60pi t) is applied to it.1. What is the What is the resistance value?2. What is the frequency of the voltage source?3.What is the period of the voltage source?"
OC userin Physicsยท25 Sep 2019In 2000, NASA placed a small 240 kg satellite in orbit 5 km above a10^16 kg spherical asteroid of radius 8.8 kmA) Determine the escape speed v(esc) (in mph) for thesatellite....... at the satelite's orbital altitude.B) Calculate the energy (work) needed to increase the satellite'sorbit by .5 km