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A certain lightbulb has a tungsten filament having a resistance of 16 ? at 22°C and 155 ? when hot. Assume R = R0[1 + ?(T - T0)] can be used over the large temperature range here. Find the temperature of the filament when it is hot.
Two cars are initially at rest at the starting line of a 100-m long track. the first car accelerates at a rate of 2.50 m/s^2. how far behind is the first car
A subway train starts from rest at a station and accelerates at a rate of 1.50m/s2 for 14.2s. find total distance covered
A car completes one lap in a time of 19.3 s, with an average translational speed of 45.2 m/s. What is the radius of the track, and what was the car's average angular speed for that lap
A 100 g ball on a 60 cm long string is swung in a vertical circle whose center is 200 cm above the floor. The string suddenly breaks while it is parallel to the ground and the ball is moving upward. The ball reaches a height 600 cm above the floor..
A simple pendulum, 2m in length, is released from the rest when the support string is at an angle of 25 degrees from the vertical
A hollow, conducting spherical shell, of radius 3.50 cm, has charge ?9.14×10?5 C. What is the strength of the electric field 2.50 m from the center of the sphere, What is the direction of the field
A 4.1×104 locomotive, with steel wheels, is traveling at 7.0 on steel rails when its engine and brakes both fail. How far will the locomotive roll before it comes to a stop
An alpha particle (m = 6.68×10?27 kg, q = 3.20×10?19 C) circularly orbits a charged sphere at a radius of 5.00 cm from the sphere's center. What is the charge on the sphere
q1. an open-pit coal mine consumes 96 hectares of land down to the depth of 26 m each year. what volume of earth in
A certain orthodontist uses a wire brace to align a patient's crooked tooth, Find the magnitude (in Newtons) of the net force exerted by the wire on the crooked tooth
Five students are ice stating. They hold hands while skating with a velocity of 10 sec and suddenly attempt to skate in a circle. calculate the centripetal acceleration and force acting on this student
q1. a ball in flight is recorded and analyzed using digital video analysis software. the analysis produced the result
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