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A generator at one end of a very long string creates a wave given by y = A cos [π(1.5x + 4.0t)], and at the other end a generator creates the wave y = A cos [π(1.5x - 4.0t)], where A = 6.0 cm, x is in meters, and t is in seconds. What is the frequency of the waves? What is the wavelength? What is the magnitude of the phase velocity? If the origin is at one end, and the length is adjusted so that there is a resonant standing wave on the string, what is x at the first node? What is x at the second node? What is x at the third node? What is x at the first antinode? What is x at the second antinode?
What is the tangential acceleration of a bug on the rim of a 13.0-in.-diameter disk if the disk accelerates uniformly from rest to the angular speed of 76.0 rev/min in 3.50 s.
The wing of an airplane has an average cross-sectional area of 11 m2 and experiences a lift force of 86,000 N. What is the average difference in the air pressure
A 8.20-kg block of ice, released from rest at the top of a 1.56-m-long frictionless ramp, slides downhill, reaching a speed of 2.58m/s at the bottom. What is the angle between the ramp and the horizontal
q1. a staging that weighs 440 n supports two painters one 110 n and the other 460 n. the reading in the left scale is
A 0.246-kg toy car is powered by three D cells (4.50 V total) connected directly to a small DC motor. The car has an effective energy conversion efficiency of 36.1%, What is the average current supplied to the car\'s motor?
A particle is projected from the surface of Earth with a speed equal to 3.4 times the escape speed. When it is very far from Earth
A 91kg water skier floating in a lake is pulled from rest to a speed of 12 m/s in a distance of 25 m.What is the net force exerted on the skier, suppose his acceleration is constant.
A 15 ohm resistor is connected to the terminal of a 12 V battery, Sketch the circuit and Calculate the current in the circuit
The 14C atom undergoes an explosion and decays into a nucleus, an electron, and a neutrino. From this determine the speed of the recoiling nucleus
Approximately how much larger would the radius of a star with the same surface temperature of the Sun (5800 K) have to be before it could be classed as a) a giant super star b) a supergiant star
A skier moving at 4.50 m/s encounters a long, rough horizontal patch of snow having coefficient of kinetic friction 0.230 with her skis. How far does she travel on this patch before stopping.
A 2.65 kg mass oscillates back and forth on a spring with a velocity vector that varies as a function of time according to the following v(t)=(3.95cm/s) sin [0.79 rad/s], What is the maximum speed of mass
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