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A 100-W driveway light bulb is on 10 hours per day. Assuming thepower company charges 10 cents for each kilowatt-hour of electricity used, estimate the annual cost to operate the bulb.
An electric wire that has a mass of 5 kg for a 20m length is strung between two poles 20 m apart. What should be the tension in the wire if it is to take 0.8 seconds for a pulse to travel along the wire from one pole to the other.
If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find out the final speed of the truck.
At some instant and location the electric field associated with an electromagnetic wave in vacuum has the strength 86.9 V/m. Find the magnetic field strength
In all cases the distance d between the charges is the same. The magnitude of the charges is |q|= 1.3 µC, and the distance between them is d = 2.9 mm. Determine the magnitude of the net force on charge 2 for each of the three drawings.
An airplane traveling north at 400 m/s is accelerated due east at a rate of 50 m/s2 for 6 s. what is the final speed of the plane
What must your average speed over the next 10 miles be to have your average speed for the total 20 miles be 13m/h? c)Given this average speed for the first 10 miles, can you possibly attain an average speed of 14for the total 20-mile ride?
Incoming UNPOLARIZED light of intensity 17 LUX passes through a linear polarizer, with its transmission axis oriented vertically. Calculate the final intensity of the light after it has passed through both polarizers
two capacitors, when connected in series have an equivalent capacitance of 200 microfarads. calculate the capacitance of each capcitor
A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.666. Find the smallest value for the angle ?, s..
You want to create a spherical mirror with a focal length of +15.0 cm. Will the mirror be concave or convex
A skier starts from rest at the top of a frictionless incline of height 20.0 m, Find the horizontal distance the skier travels before coming to rest if the incline also has a coefficient of kinetic friction equal to 0.216
A charge of 18.0?C is held fixed at the origin. If a -6.50?C charge with a mass of 3.00g is released from rest at the position (0.925 m, 1.17 m), what is its speed when it is halfway to the origin
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