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The bright star Sirius in the constellation of Canis Major (the Large Dog) has a radius of 1.67 R? and a luminosity of 25 L?. (a) What is the energy flux at the surface of Sirius? (b) What is the star's surface temperature?
a particle has a charge of 1.5 microc and moves from point a to point b a distance of 0.25 m. the particle experiences
A 2.7-kg copper block is given an initial speed of 2.5 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. If the block absorbs 85% of its initial kinetic energy as internal energy, compute its increase in tempera..
A man with mass m1 = 54 kg stands at the left end of a uniform boat with mass m2 = 174 kg and a length L = 2.6 m. After the man walks to the right edge of the boat, what is the new location the center of the boat
A boy throws a stone horizontally at a speed of 22.0 m/s from the top of a building of height 6.40 m. What is the horizontal distance from the bottom of the building to the point where the stone lands on the level ground?
A rocket-powered hockey puck has a thrust of 4.0 N and a total mass of 1.0 kg. It is released fromrest on a frictionless table, 4.5 m from the edge of a 2.0 m drop. The front of the rocket is pointed directly toward the edge. How far does the puck la..
A 0.45 kilogram object connected to a light spring with a force constant of 19.6 N/m oscillates on a frictionless horizontal surface. Compute the speed of the object when the spring is compressed 1.5 centimeter
A square, perfectly reflecting surface is oriented in space to be perpendicular to the light rays from the Sun, What is the radiation force on the surface from the light rays
you have three 3.0 uf micro farads capacitors. two of the capacitors are in parallel and this parallel combination is
q1. a pipe open at one end only has a fundamental frequency of 237 hz. a second pipe initially identical to the first
A diver has a birthmark of area 2.0 cm^2. When the birthmark is 4.0 meters beneath the surface of the pool, what is the contact force exerted by the water on this birthmark
Two 12-cm-diameter charged rings face each other, 17.0 apart. Both rings are charged to + 40.0. What is the electric field strength at the midpoint between two rings.
Suppose a hiker falls into a crack in a glacier while mountain climbing. Assume the ice moves as a Newtonian fluid with viscosity = 250 x 106 CP.
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