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Find what angle does the vector that points from the origin of the x-y plane to the point (2.0, 3.0) make with respect to the x-axis?
a vector force f1 has a magnitude of 2.0 n and directed due east is exerted on an object. a second force exerted on the
The longest "string" (a thick metal wire) on a particular piano is 3.0 m long and has a tension of 300.0 N. What is the total mass of the wire
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 423 N and F2 = 355 N. What is the resultant of these two forces
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 54 dB by an observer 10 km away. What is the average power generated by the horn
While working in a research lab, you find that it takes396 J of heat to increase the temperatureof 0.99 kg of a material by 32 K. What is the specific heat of the material
Block 1, of mass m1 = 4.90 kilogram, moves along a frictionless air track with speed v1 = 27.0 m/s. Find the magnitude pi of the total initial momentum of the two-block system
You are asked to design an LR circuit with a time constant of 5 x10-4 seconds. You have at your disposal a real inductor (L = 0.02 H, R = 10 Ω) and a wide variety of resistors. What value resistor must you choose for the circuit?
A 7.4- g piece of silver undergoes isochoric heating, By how many joules does the internal energy change
A parallel beam of light from a He-Ne laser, with wavelength of 644 nm, falls on two very narrow slits 0.05 mm apart. How far apart are the fringes in the center of the pattern on a screen 2.2m away.
A 54.9 kg ice skater is moving at 4.02 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.791 m around the pole. Determine the force exerted with the horizontal rope on her ..
a glass lens nglass 1.52 has a 139 nm thick anti-reflective film nfilm 1.29 on one side. light moving through the air
A layer of oil (n = 1.45) floats on an unknown liquid. A ray of light originates in the oil and passes into the unknown liquid. What is the index of refraction of the unknown liquid
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