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A thin film of alcohol (n = 1.36) lies on a flat glass plate (n =1.51). When monochromatic light, whose wavelength can be changed,is incident normally, the reflected light is a minimum for λ =512 nm and a maximum for λ = 640 nm. What is the thickness of the film?
A ball traveling in a circle with a constant speed of 3 m/s has a centripetal acceleration of 4 m/s2. What is the radius of the circle
A 4 kg mass is attached to the end of a horizontal spring on a smooth surface. It is pulled 3 meters away from equilibrium and released. What is the maximum speed of the mass during its motion
a skateboard with mass M rolls down a ramp, starting from rest. It takes a time T to roll a distance L along the ramp
The equation of a transverse wave on a string is y =(2.0 mm) sin[(22m-1)x - (675s-1)t]. The tension in the stringis 10 N. Find the linear density of this string
If astronauts could travel at v = 0.910c, we on Earth would say it takes (4.20 / 0.910) = 4.62 years to reach Alpha Centauri, 4.20 light-years away. How much time passes on the astronauts' clocks
A model rocket fired vertically from the ground ascends with a vertical acceleration of 4.0 m/s2 for 5.8 s, What is the maximum altitude reached
What are the first, second, and third frequencies audible from a 20cm long organ pipe when (1) only one end is open and when (2) both ends are open. The speed of sound through the air inside the organ pipe is 343 m/s. (Hint: if a harmonic does not..
An electron and a positron have masses of 9.11 10-31 kg. They collide and both vanish, with only electromagnetic radiation appearing after the collision. determine the energy of the electromagnetic radiation
The skis have a thrust of 220 N. Sam's speed at the bottom is 45.0 {rm m/s}. Illustrate what is the coefficient of kinetic friction of his skis on snow?
A railroad freight car weighing 289 kN and traveling at 1.52 m/s overtakes one weighing 207 kN and traveling at 0.910 m/s in the same direction. Find the loss of kinetic energy during collision
If the average molecular mass of compounds in food is 47.5, how many molecules are there in 1.00 kg of food, Find the ratio of ion pairs to molecules
A particular heat engine has a useful power outputof 5.30 kW and an efficiencyof 24.0%.The engine expels 6300 J ofexhaust energy in each cycle. Find the time interval for each cycle
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