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The positron is a particle with the same mass as an electron but charge +e. A positron in a bubble chamber moves perpendicular to a 3.4T magnetic field. a) If the positron's kinetic energy is 27eV , what's the radius of its trajectory in the bubble chamber? Express your answer to two significant figures and include the appropriate units.
A 15 g bullet strikes and becomes embedded in a 1.10 kg block of wood placed on a horizontal surface just in front of the gun. what was the muzzle speed of the bullet
One end of a wire is attached to a ceiling, and a solid brass ball is tied to the lower end. The tension in the wire is 145 N. What is the radius of the brass ball
question a tungsten filament used in a flashlight bulb operates at 0.20 a and 3.2 v. if its resistance at 20oc is 1.5?
in a simple model of the hydrogen atom the electron moves in a circular orbit of radius 0.053 nm around a stationary
the electric field of a charge is 1.37e07 nc at a distance 16.3 cm and points away from the charge. what is the sign
1. the ground state ofnbsp has jpi 32-1 the first excited state at 67.4 kev has jpi 12-1 and the second excited state
A galvanometer has a full-scale current of 0.11 mA and a coil resistance of 57 Ω. This instrument is used with a shunt resistor to form an ammeter that will register full scale for a current of 74 mA. Determine the resistance of the shunt resistor.
A particle is moving around in a circle and its position is given in polar coordinates as x = Rcos?, and y = Rsin?, derive the equation for centripetal acceleration
A gas with initial conditions (P,V,T)i expands isothermally until the final volume=1.986 times the initial volume. What is the ratio of the final pressure to the initial pressure
Only 25% of the intensity of a polarized light wave passes through a polarizing filter. What is the angle between the electric field and the axiz of the filter
a water tower 30 m tall is located at the top of a hill. from a distance of d 125 m down the hill it is observed that
question a 120-kg mail bag hangs by a vertical rope 3.5 m long. a postal worker then displaces the bag to a position
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