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A student throws a baseball at a large gong 61 m away and hears the sound of the gong 1.5404 s later. The speed of sound in air is 330 m/s.
What was the average speed of the baseball on its way to the gong? (For simplicity, assume its trajectory to be a straight line.)
Four ideal linear sheet polarizers are stacked one behind the other with the transmission axes of the first vertical, the second at 30°, the third at 60°, What fraction of the incident unpolarized light emerges
The following two lists give the diameters and sound frequencies for three loudspeakers. find the common diffraction angle
Two electrodes are placed in a calcium chloride solution and a potential difference is maintained between them. what is the current in the solution
The slit spacing is 0.20nm and the wavelength of the light is 600nm. What is the distance from the slits to the screen
A 71-kg skier encounters a dip in the snow's surface that has a circular cross section with a radius of curvature of 12 m. what is the normal force exerted by the snow on the skier at point B
What are (a) x component and (b) y component of a vector in the xy plane if its direction is 329° counter clockwise from the positive direction of the x axis and its magnitude is 9.0 m.
a 4.6kg sphere made of metal whose density is 3800kg/m^3, is suspended by a cord. What fraction of the volume of the sphere is submerged
Compute the final equilibrium temperature.
The radius of a black hole is the distance from the black hole's center at which the escape speed is the speed of light. What is the radius of a black hole with the same mass as that of the Earth
What is the size of the frictional force acting on the car
What is the energy density in the electric field at the surface of a 2.00-cm-diameter sphere charged to a potential of 2000V
A string oscillates according to the equation below. y = (0.30 cm) sin[(?/3 cm-1)x] cos[(20? s-1)t] , What is the distance between nodes
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