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The following two lists give the diameters and sound frequencies for three loudspeakers. Pair each diameter with a frequency, so that the diffraction angle is the same for each of the speakers, and then find the common diffraction angle. Take the speed of sound to be 343 m/s.
At what average rate does the force from the cable. A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 15 {rm m}/{rm s} as the hand is 2.0 {rm m} above the ground.
If a hydrogen atom in its ground state is illuminated with em radiation of wavelength 97.44 nm, what is the highest state the electron can be promoted
An old wooden tool is found to contain only 18% of 146C that a sample of fresh wood would. How old is the tool
What is the change in length of the rope whilst the skier has the acceleration whose magnitude is 0.65 m/s2.
What is magnitude of the runner total displacement
A traveling sinusoidal electromagnetic wave in vacuum has an electric field amplitude of 57.1 V/m. Find the intensity of this wave and calculate the energy flowing during 16.9 s through an area of 0.0217 m2
Illustrate what is the horizontal component of the superhero’s displacement? Draw the vectors to scale on a graph to determine the answer.
A beam of parallel rays from a 24 MHz citizens band radio transmitter passes between two electrically conducting (hence opaque to radio waves) buildings located 45.00 m apart. What is an angular width of the beam as it emerges from between the buildi..
A 390 nm thick film floats on a puddle of water. When illuminated normally with 700 nm light there is no reflection, but 400 nm light is strongly reflected. What is the film's index of refraction
A galvanometer with a full-scale sensitivity of 800uA and a coil resistance of 54 ohms is to be used to build an ammeter designed to read 6.0A at full scale
a carnival ride consists of a vertical cylindar, radius 2 m. When it revolves it pins people to its walls, What is the required period of revolution
A 36 kg girl and a 7.9 kg sled are on the frictionless ice of a frozen lake, 20 m apart but connected by a rope of negligible mass. How far from the girl's initial position do they meet
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