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In the AC circuit shown in Figure P33.5, R = 70.0 ohms and the output voltage of the AC source is Vmax*sin(wt). (a) If VR = .250*Vmax for the first time at t = .010 s, what is the angular frequency of the source? (b) What is the next value of t for which VR = .250*Vmax?
Air is streaming horizontally past a small airplanes wings such that the speed is 50m/s over the top surface and 30 m/s past the bottom surface. the plane has a mass of 300 kg and a total wing area of 5 m^2(both wings).
A proton enters a uniform 0.2T magnetic field at right angles. What is the frequency of the proton's subsequent circular orbit
A cosmic ray proton streaks through the lab with velocity 0.80c at an angle of 55° with the +x direction (in the xy plane of the lab). Compute the magnitude and direction of the proton's velocity
An air-hockey puck floats across the table and bumps into a second puck, initially at rest. The first puck (mass 0.0250 kg) is moving initially due East at 5.50 m/s. Find the speeds of both picks after the bump
A person consumes a meal containing 17 kcal. What is the power this meal produces if it is to be "burned off" due to exercise in 6 hours
A 1-m-tall barrel is closed on top except for a thin pipe extending 5 m up from the top. What is the pressure on the bottom when water is added to fill the pipe to its top
Point particle a with mass ma is moving in the positive x direction and collides with stationary point particle b with mass mb. Prove that it is not possible for a to “stick” to b so that both particles move together as a single object after the coll..
Rhea, one of Saturn's moons, has a radius of 765 km, Calculate its mass and average density
A steel wire with mass 29.7 g and length 1.52 m is strung on a bass so that the distance from the nut to the bridge is 1.10 m. Compute the linear density of the string
After 2.02 days, the activity of a sample of an unknown type radioactive material has decreased to 82.2% of the initial activity. What is the half-life of this material
Two 8.0mm×8.0mm electrodes with a0.10-mm-thick sheet of Mylar between them are attached to a 9.0V battery. find the electric field before and after the Mylar is withdrawn
The maximum speed of a small girl on a swing is 3.96m/s. Calculate how high above the ground is she at her highest point
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