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An isotope of krypton has a half-life of 3 minutes. A sample of this isotope produces 1000 counts per minute in a Geiger counter. Determine the number of counts per minute produced after 15 minutes.
A projectile is launched with a speed of 40 m/s at an angle of 60o above the horizontal. Use conservation of energy to compute the maximum height reached by the projectile
A point charge of +5.34 ?C is located at the center of a sphere with a radius of 12.6 cm. Determine the electric flux through the surface of the sphere.
A point source of light is submerged 2.2 meters below the surfaceof a lake and emits rays in all directions. What is the maximum radius that this circle could have
Sodium Chloride gas has molecules that are ionically bonded. The Sodium end has a charge of +1e, calculate the dipole moment
A 30 g ball of clay traveling east at 2.0 m/s collides and sticks together with a 30 g ball of clay traveling north at 4.0 m/s. What is the speed of the resulting ball of clay
when the bungee jumper is reaching the end of his cord he begins to slow. while slowing down the direction of his
A spherical ball of material is rotating about its center at 35 rad/s. It has a mass of 2.0 kg and a radius of 0.11 m. what will be its rate of rotation
Three deer, A, B, and C, are grazing in a field. Deer B is located 64.2 m from deer A at an angle of 51.3 ° north of west. What is the distance between deers
A 58 kg man is riding on a 50 kg cart traveling at a speed of 3.1 m/s. He jumps off with zero horizontal speedrelative to the ground. What is the resulting change in the cart's speed
To start a lawn mower, you must pull on a rope wound around theperimeter of a flywheel. find the maximum angular speed reached by the flywheel
A block slides upward on a rough, vertical wall at constant velocity when a force F of 60 N acts on it at an angle ? = 60? to the horizontal. Determine the force of kinetic friction on the block
A block is attached to a ceiling by a spring of force constant k. When pulled down and released, what is the force constant k of the spring
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