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The pilot of an airplane wants to fly East in the presence of a 50 km/h wind with direction 60 degrees North of West as seen by a ground observer. The speed of the plane respect to still air is 250 km/h. Find the angle the plane must make respect to East.
A 65-? loudspeaker, a 8.0-? loudspeaker, and a 2.1-? loudspeaker are connected in parallel across the terminals of an amplifier. Determine the equivalent resistance of the three speakers
a 1010-kg car is being driven up a 6.03 deg hill. the frictional force is directed opposite to the motion of the car
A speaker at the front of a room and an identical speaker atthe rear of the room are being driven at 421 Hz by the same sound source. How many beats does the student hear per second
A 10cm long thin glass rod is uniformly charged to +50nC. A small plastic bead, charged to -5.3nC,is 4.4cm from the center of the rod
A sanding disk with rotational inertia 5.4 x 10-3 kg·m2 is linked to an electric drill whose motor delivers a torque of magnitude 10 N·m about the central axis of the disk. About that axis and with torque applied for 72 ms, what is the magnitude o..
After a completely inelastic collision, two objects of the same mass, Find the angle between the initial velocities of the objects
A transformer has an input coil with Nin = 200 turns and Nout = 800 turns. what is the voltage across the output circuit
A simple pendulum has a period of 2.5 s. (a) What is its period if its length is made four times larger? (b) What is its period if the mass of the suspended bob is made two times larger?
converging lens with a diameter of 33.0 cm forms an image of a satellite passing overhead. what is the altitude of the satellite
A series RC circuit, which is made from a battery, a switch, a resistor, and a 3.0-µF capacitor, has a time constant of 9.0 ms. what is the resulting time constant
An object is 100 cm in front of a concave mirror that has a radius of 80 cm. Calculate the image distance and lateral magnification
On the way from a planet to a moon, astronauts reach a point where that moon's gravitational pull transitions from being weaker than that of the planet to being stronger than that of the planet. Determine the distance of this point from the center ..
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