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Consider material with a frequency dependent refractive index n=n(ω). Calculate the group velocity in this material.
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber, If a sample of gold with a mass of 2.477g, is pressed into a leaf of 4.116 ?m thickness, what is the area (in m2)..
A medieval knight is "racked", stretching his body with a force of 1200 N. Using the data in the previous problem, by how much will the knight's femur bones be stretched?
A 6.00 kg mass (m) is suspended from a 65 kg flywheel having a radius of 0.75 m. Determine the angular acceleration of the flywheel as the mass falls
A 0.031 kg aluminum bullet traveling at 471 m/s strikes an armor plate and comes to a stop, what is the bullet's temperature change in degrees Celsius
on a spacecraft two engines fire for a time of 550 s. one gives the craft an acceleration in the x direction of ax
A microwave radio transmitter emits electromagnetic waves of a single wavelength. What is the power of the transmitter
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.69 m and 1.04 m, respectively. The respective rotational speeds are 452 rev/min and 4,140 rev/min. Calculate the speeds of the tips of both rotors
A metal ball with a mass of 3.81·10-6 kg and a charge of +5.21 mC has a kinetic energy of 4.77·108 J. how close will it come to the plane before stopping
define How fast is the osprey approaching. Two of the fragments move with the same speed right after the explosion as the entire projectile had just before the explosion.
What is the mass in grams of 1L of helium gas as STP? (Find moles and then convert moles to grams; atomic mass =4.0grams/mol), Why do helium balloons float
An ice skater is gliding horizontally across the ice with an initial velocity of +6.46 m/s. How much time elapses before her velocity is reduced to +2.69 m/s
you hit a ball of mass 0.5 kg. the force you apply to the ball is 20 n for a time of 0.3 s.a. what is the impulse?b.
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