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Q. Sources A and B emit long-range radio waves of wavelength 530 m, with the phase of the emission from A ahead of that from source B by 90°. The distance rA from A to a detector is greater than the corresponding distance rB from B by 110 m. What is the magnitude of the phase difference at the detector?
Q. A 20kg child is on a swing that hangs from 3m long chains, what is her speed initially at the bottom of the arc if she swings out at a 45 degree angle before reversing action?
Let the masses of blocks A and B be 4.0 kg and 2.0 kg, in that order, the moment of inertia of the wheel about its axis be 0.400 kg*m^2, and the radius of the wheel be 0.140 m. Find the linear accelerations of block A if there is no slipping between ..
An airplane is flying horizontally with a speed of 1000 km/h(280m/s) when an engine falls off. avoid air resistance,assume it takes 30s for the engine to hit the ground.
You swing a 2.60 kg stone in a circle, using the full length of a thin 60.0 cm rope. At what speed must you swing it so its acceleration will be 9.8 m/s^2.
What is an average power output of the laser. What is the rms value of the electric field in the beam.
Analyse the instantaneous velocity of the car
A projectile is fired at an upward angle of 45° from the top of a 308m cliff with a speed of 198 m/s. What will be its speed while it strikes the ground below? (Use conservation of energy.)
A lighthouse that rises 49 above the surface of water sits on a rocky cliff that extends 19 from its base. A sailor on the deck of a ship sights the top of the lighthouse at the angle of 30.0 above the horizontal.
Calculate the pressure at the center of pipe A. Suppose T = 10?C.
Capacitance and resistance network.
What is current flowing through the collider
When catching a baseball, a catcher's glove moves by 12cm along the line of motion of the ball. If the baseball exerts a force of 477N on the glove, how much work is done by the ball.
Distance between focal plane and lens
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