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A common flashlight bulb is rated at 0.300 A and 3.00 V (the values of the current and voltage under operating conditions). If the resistance of the bulb filament at room temperature (20°C) is 1.70Ω, what is the temperature of the filament when the bulb is on? The filament is made of tungsten
An electron moves west to east in the continental United States. Does the magnetic force experienced by the electron point in a direction that is generally north, south, east, west, upward, or downward? Explain.
An electron is accelerated from rest during a potential difference of 800 V. It then moves perpendicularly to a magnetic field of 30 G. Discover the radius of its orbit and its orbital frequency.
A puck rests on a horizontal frictionless plane. A string is wound around the puck and pulled on with constant force. What fraction of the disk's total kinetic energy is due to the rotation?
A 70.0cm wire of mass 8.20g is tied at both ends and adjusted to a tension of 41.0N. When it is vibrating in its second overtone, find the frequency at which it is vibrating
Suppose in a situation like m1 = 200g were at the 20-cm position and m2 = 100g at the 65-cm position. Would there be a problem in experimentally balancing an equilibrium system with m3 = 50g? Explain. If so, how might the problem be resolved?
A 0.50kg ball with a speed of 10m/s hits a wall and bounces back with only 0.75 of the original speed. How much kinetic energy is lost in the balls collision
A 95 long train begins uniform acceleration from rest. The front of the train has a speed of 25 while it passes a railway worker who is standing 170 from where the front of train started. What will be the speed of the last car as it passes the wor..
A mass m = 11.0 kg rests on a frictionless table and accelerated by a spring with spring constant k = 4093.0 N/m. How much work is done by the spring as it accelerates the mass
A body is suspended vertically from an ideal spring of spring constant 3.4 N/m. The spring is initially in its relaxed position. The body is then released and oscillates about its equilibrium position. The motion is described by the following equa..
A 15 pF capacitor is charged to 1 kV and then removed from the battery and connected in parallel to an uncharged 65 pF capacitor, Find the change in energy
a demonstration gyroscope consists of a uniform disk with a 38-cm radius mounted at the midpoint of a light 59-cm axle.
the current in an incandescent lamp is 0.5a when connected to a 120-v circuit and 0.2 a when connected to a 10-v
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