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Light is traveling in an optical medium with a refractive index of 1.55 and is incident on an interface with air. What is the critical angle for light traveling in this optical medium?
The air speed indicator of a plane that took off from Detroit reads 343 km/h and the compass indicates that it is heading due east to Boston. Calculate the speed of the plane with reference to the ground
A cube of mass m = 6.55 kg is placed on an inclined plane of mass M = 10.07 kg, which makes an angle ? = 42.20° with the horizontal. What is the normal force on the inclined plane
A 0.33-m-long violin string has a mass of 0.89 g. The peg exerts a 45 N force on it. Determine the lowest frequency sound produced by the vibrating sting
A rock is dropped from a high tower and falls freely under the influence of gravity. Which one of the following statements concerning the rock as it falls is true? Neglect the effects of air resistance.
A long uniform rod of length 1.00 m and mass 6.00 kg is pivoted about a horizontal, frictionless pin through one end. Find the components of the reaction force at the pivot
A 40-kg pole vaulter running at 14 m/s vaults over the bar. Her speed while she is above the bar is 1m/s. Avoid air resistance, in addition to any energy absorbed by the pole, and determine her altitude as she crosses the bar.
What is the rms current in an RL circuit when a 60.0Hz 240V rms ac voltage is applied, where R = 1.80k? , and L = 420mH?, What is the phase angle between voltage and current
The weight of a star is usually balanced by two forces: the gravitational force, acting inward, and the force created by nuclear reaction, acting outward. compute the radius of the geostationary orbit for this neutron star?
A 15g bullut is stopped in a block of wood ( mw=5.8 kg). What was the origional speed of the bullet
A 32cm string being held at a tension of 64.5N has a fundamental frequency of 440Hz. What are the second and third harmonics of the string
A cylinder contains a mixture of helium and argon gas in equilibrium at a temperature of 151? C. Boltzmann's constant is 1.38066 × 10?23 J/K, What is the rms speed of argon
Particles of charge Q1 = +69 µC, Q2 = +51 µC, and Q3 = -80 µC are placed in a line, Calculate the net force on each charge due to the other two
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