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An electric kettle of 7.0 Ω resistance containing 500 cm3 of water at 10ºC is connected to the 110 V supply. If 10% of the electrical energy is wasted by imperfect insulation, calculate how long it takes to convert all of the water into steam.
what is the dimension of gravitational force and what is the dimension of acceleration
A textbook of mass 2.10kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.190m, What is the tension in the part of the cord attached to the book
what is the magnitude of the force between the two charges. The scale of vertical axis is set by vs = 5.10 m/s. What is the coefficient of kinetic friction between block and floor.
q1. a proton moves perpendicular to a uniform magnetic field b at 1.6 multiplied by 107 ms and experiences an
A sled weighs 100N. It is held in place on a frictionless 20 degrees slope by a rope attached to a stake at the top, the rope is parallel to the slope. What is the normal force of slope acting on the sled.
When an atom emits a photon in a transition from a state of energy E1 to a state of energy E2, Evaluate this recoil energy for the n = 2 to n = 1 transition of hydrogen.
It takes the elevator in a skyscraper 4.5s to reach its cruising speed of 12m/s. What is the passenger's weight before the elevator starts moving
A 1382-kg car is moving westward with a speed of 21.1 m/s, Find the velocity of the center of mass of the car-truck system
Inside an insulated container, a 250-g ice cube at 0 °C is added to 200 g of water at 18 °C. What is the remaining ice mass
the rms current produced by a single coil of an electric guitar is 0.025A. How large is the maximum instantaneous current
High-voltage power lines are a familiar sight throughout the country. What is the resistance of ten kilometers of this wire
An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2. (a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in (a) the first hal..
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