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The corroded contacts in a light bulb socket have 8.5? ohms total resistance. Find how much actual power is dissipated by a 110 Watt (120 V) light bulb screwed into this socket?
One simple model for a person running the 100{\rm m} dash is to assume the sprinter runs with constant acceleration until reaching top speed, what will be his total time
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 52.0 cm. The explorer finds that the pendulum completes 93.0 full swing cycles in a time of127 s. What is the value of the acceleration of gravity on this ..
Two equal, positive charges, q=2.0µC are located on the x-axis, one at+0.3m and the other at -0.3m. Find the magnitude and direction of the resultant (net) force on Q
A pole vaulter vaults over the bar and falls onto thick padding. He lands with a speed of 9.8m/s; the padding then brings him to a stop in a time of 0.40s. What is the average force on his body due to the padding during that time interval?
A wire carries a steady current of 2.20 A. A straight section of the wire is 0.750 m long, what is the magnetic force on the section of wire
a grandfather clock is controlled by a swinging brass pendulum that is 1.1 m long at a temperature of 25degc.a what is
At a coal-burning power plant a steam turbine is operated with a power output of 465 MW. The thermal efficiency of the power plant is 31.6%. (a) At what rate is heat discarded to the environment by this power plant? (b) At what rate must heat be supp..
A dynamite blast at a quarry launches a rock straight upward, and 2.4 second later it is raising at a rate of 12 m/s. evaluate its speed at launch
Rods of copper, brass, and steel are welded together to form a Y-Shaped figure. The cross-sectional area of each rod is 2 cm2. Calculate the temperature of the junction point
Suppose you have a 9.00 V battery, a 2 ?F capacitor, and a 7.25 ?F capacitor. Find the charge if the capacitors are connected to the batt
The acceleration of a particle along an x axisis a = 7.0t,with t in seconds and a inmeters per second squared. At t = 3.0 s, itsvelocity is +24 m/s. What is its velocity at t =8.0 s?
a lightning bolt with 20000a of current in a circular cross section of radius 5mm strikes the ground 1m from where you
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