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In Figure, there is a uniform magnetic field of magnitude B = 2.3 T and directed into the plane of the paper in the region shown. Outside this region the magnetic field is zero. A rectangular loop 0.20 m by 0.60 m and of resistance 8 ohm is being pulled into the magnetic field by an external force, as shown. What is the direction (clockwise or counterclockwise) of the current induced in the loop? Calculate the magnitude of the external force Fext required to move the loop at a constant speed of v = 3.9 m/s. The mass of the loop is 0.008 kg.
A 3.0 kg mass sliding on a frictionless surface explodes into three 1.0 kg masses. After the explosion the velocities of the three masses
Two point charges are located on the axis as follows: charge = -1.80 at = -0.500 , and charge = 2.20 at the origin (= 0). What is the direction of the net force
A submarine suddenly breaks up at a depth of 248 m below sea level. The air in the submarine will then be suddenly (adiabatically) compressed. The initial pressure of the air is 1.0 atm, and the initial temperature is 23.0°C.
Ann is driving down a street at 53km/h. suddenly a child runs into the street. If it takes Ann 0.709s to react and apply the brakes, how far will she have moved before she begins to slow down? Answer in units of m.
The conduction electrons in a metal can be considered for some purposes as an ideal gas. Find the beam current in amperes
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 1.95 106 m/s. Find the centripetal acceleration of the electron
two small plastic balls hang from threads of negligible mass. each ball has a mass of 0.14 g and a charge of magnitude
A laser used to weld detached retinas puts out 31 milliseconds long pulses of 640 nanometers light which average 0.71 Watt output during a pulse. Obtain how many photons does each pulse contain
for a horizontal block spring system, the maximum displacement is 15cm. if k = 150N/m, calculate the mass of the block, calculate maximum value of kinetic energy
A chemical battery with emf 10 Volt has an internal resistance of 5.9 ohm's. Find what will be the voltage of the battery
Obler's paradox presented the contrary facts that the universe had to be infinite and uniform in order to be stable and if the universe was infinite the night sky should be as bright the surface of the stars. How was the paradox resolved?
A diver completes somersaults during a 2.1 sec dive. What was the diver's average angular speed during the dive
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