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A certain radioisotope has a half-life of 8.57 days. What percentage of an initial sample of this isotope remains after 28 days?
An electron is moved from point A to point B in a uniform electric field and gains 5.4010^-15 J of electrostatic potential energy. Calculate the magnitude of the electrostatic potential difference between the two points.
A horizontal wire of length 0.43 m, carrying a current of 6.9 A, is placed in a uniform external magnetic field. Determine the magnitude of the external magnetic field
An ideal heat engine takes in 460J of heat at a temperature of 600K and outputs 285J of heat. How much work is done by the engine
Calculate the mechanical advantage of a group of pulleys used to raise an engine from a car. The engine is raised 1.2 m with the pulleys when 4.8 m of rope is pulled through the pulleys.
A woman is 1.8 m tall and has a mass of 61 kg. She moves past an observer with the direction of the motion parallel to her height. What does the observer measure for her height
q1. a 2.62 kg mass attached to a light string rotates on the horizontal frictionless table. the radius of the circle is
King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 50 m/s and at an angle of 35°. What is the ball's maximum height above the ground
A +1 uC charge is held 10 cm directly above the origin. A -1 uC charge is held 5 cm directly to the right of the origin. What is the electric potential at the origin
A high-voltage transmission line is made of bare wire; it is not insulated. Assume that the wire is 100 km long, has a resistance of 7.0 Ω, and carries 200 A.
Two tiny spheres have the same mass and carry charges of the same magnitude. The mass of each sphere is 5.04 10-6 kg. Determine the charge magnitude
the lob in tennis is an effective tactic when your opponent is near the net. it consists of lofting the ball over his
a particle with positive charge q = 6.40 x 10-19 C moving with speed v = 8.13 x 105 m/s toward a long straight wire with current i = 229 mA, What is the magnitude of the force on the particle due to the current
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