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A lecturer is demonstrating two-slit interference with sound waves. Two speakers are used, 1.5 m apart. The sound frequency is 1210 Hz and the speed of sound is 343 m/s. Students sit facing the speakers in a row of seats 6.3 m away. Along the row of students, what is the spacing between the locations on either side of the center line between the speakers where no sound is heard because of destructive interference? The angle may be to large to use small angle approximation. Answer in units of m.
An n-type Si crystal (1017 donor/cm3) contains 1015 Au/cm3. What are the low level and high level lifetimes of electrons and holes in this sample?
A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown. Evaluate how long is the ball in the air
A curve of radius 53.8 m is banked so that a car of mass 2.5 Mg traveling with uniform speed 56 km/hr can round the curve without relying on friction to keep it from slipping on the surface
how to determine the magnitude of the acceleration at the instant.
A fairground ride called "The Wall of Death" consists of a cylindrical container of internal diameter 6.50m, mounted on a cylindrical axis. Calculate the coefficient of static friction between the wall and the passengers' backs
Suppose unpolarized light of intensity 244 W/m2 falls on the polarizer in the figure, and the angle in the drawing is 36.0°. What is the light intensity reaching the photocell
a shaving or makeup mirror is a large concave mirror. in terms of its focal length f what is the range of distances
A proton has an initial speed of 3.3*10^5, What potential difference is required to reduce the initial speed of the proton by a factor of two
Bats are capable of navigating using the earth's field-a plus for an animal that may fly great distances from its roost at night. What is the proper orientation of the coil
A 600 gram particle (initially at rest at the origin) is subjected to a force of F=15i+20j (N) which pushes the particle along a track with a displacement described by s=3i+4j (m). calculate the average power produced by this force
A 4.67-kg ball of clay is thrown downward from a height of 2.77 m with a speed of 4.81 m/s onto a spring with k = 1450 N/m. Find the total work done on the clay during the spring's compression
A baseball is thrown at an angle of 27 degrees relative to the ground at a speed of 20.9m/s. The ball is caught 36.0231m from the thrower. The acceleration due to gravity is 9.81m/s square. Explain how long is it in the air ?
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