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A charging RC circuit controls the intermittent windshield wipers in a car. The emf is 12.0 V. The wipers are triggered when the voltage across the 126-µF capacitor reaches 10.0 V; then the capacitor is quickly discharged (through a much smaller resistor) and the cycle repeats. What resistance should be used in the charging circuit if the wipers are to operate once every 1.40 s?
A layer of transparent plastic (n = 1.63) on glass (n = 1.52) looks dark when viewed in reflected light whose wavelength is 576 nm in vacuum. Find out the two smallest possible nonzero values for the thickness of the layer.
An airplanes airspeed (relative to still air) is 135 mph. The wind speed relative to the ground is 37 mph and is directed at theta = 51 deg
Determine the location at which the tuning is formed and the vibrating frequency of a string to form a standing wave pattern.
A glider moves frictionlessly along an air track that has been tilted by 1.5 inches over a span of 1.00 meters. Illustrate what is the expected acceleration of the glider.
A 2.5kg mass is attached to a spring and placed on the horizontal, smooth surface. A horizontal force of 18.4 N is necessary to hold the mass at rest while it is pulled 0.210 m from its equilibrium position.
An object moves with constant acceleration 3.55 m/s2 and over a time interval reaches a final velocity of 12.8 m/s.
what is the compressional stress that the arm withstands during the crash?
When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.39 m. Compute the horizontal distance the ball would travel if the same spring were aimed 28.0 deg from the horizontal.
Suppose the Eskimo is pushing the same 50.0-kg sled across level terrain with a force of 50 N. If he does 4 x 10^2J of work on the sled while exerting the force horizontally, through what distance must he have pushed it.
A 200g block is suspended from a vertical spring, causing the spring to strech by 20 cm, What is the speed of the block when it is 5.0cm above the equilibrium position
Water can hold 36 grams (g) of salt in every 100 milliliters (mL). The ocean contains 3.6 g of salt in every 100 mL. As a solution, which is seawater.
At time t=0 a grinding wheel has an angular velocity of 28.0 rad/sec. It has the constant angular acceleration of 35.0 rad/sec^2 until a circuit breaker trips at time t=1.80. From then on, the wheel turns through an angle of 433 as it coasts to the s..
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