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A scientist notices that an oil slick floating on water when viewed from above has many different rainbow colors reflecting off the surface. She aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). The index of refraction of water is 1.33.
The index of refraction of the oil is 1.20. What is the minimum thickness t of the oil slick at that spot?
Suppose the oil had an index of refraction of 1.50. What would the minimum thickness t be now?
In a certain RL time constant circuit, it takes 135 msec for the current to reach maximum after the switch is closed.
A telephoto lens consists of a converging front lens of focal length f1 and diverging back lens of focal length f2 separated by a distance d. Compute the effective focal length of the lens system
If the heat engine used to harvest the energy from humans was operating at the theoretical maximum efficiency what temperature would the cold reservoir have to be make this energy source viable? (Assume the hot reservoir is that of the average ski..
A total of 2.99·106 electrons are placed on an initially uncharged wire of length 2.25 m. What is the magnitude of the acceleration of a proton placed at that point in space
Consider a horizontal spring of spring constant 30 N/m. A 2 kg mass is attatched to the spring and pulled .05 m from the equilibrium position along a frictionless table. what is the maximum speed of the vibrating mass
A block is on a rough horizontal surface. A horizontal force of magnitude 3 N is applied to the block. What is the frictional force exerted on the block
An ambulance with a siren emitting a whine at 1200 Hz overtakes and passes a cyclist pedaling a bike at 2.44 m/s, How fast is the ambulance moving
A pulsed laser emits light at a wavelength of 480.7 nm. The pulse duration is 12.1 ps and the energy per pulse is 0.190 J. What is the length of the pulse
A block of wood of mass 4.85 kg rests on a horizontal frictionless surface. find the velocity of the wood after the bullet has passed through
State and explain magnetic dipole moment µ of a coil of number of turns N and area A carrying current i
The gravitational force between two electrons that are 0.97 m apart is 5.76 multiplied by 10-71 N. Find out the mass of an electron. (Use G = 6.67 10-11 N · m2/kg2.)
Fusion reactors attempt to utilize the same nuclear reaction that occurs within the sun. Two deuterium nuclei will combine together to form helium if they are close enough, How fast must the deuterium nuclei be going to touch
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