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Ring-no-answer. A common form of nonresponse in telephone surveys is "ringno-answer." That is, a call is made to an active number but no one answers. The Italian National Statistical Institute looked at nonresponse to a government survey of households in Italy during the periods January 1 to Easter and July 1 to August 31. All calls were made between 7 and 10 P.M. rate of no answers? Why? Explain why a high rate of nonresponse makes sample results less reliable.
The cable pulls horizontally on the box, and a 50.30 bag of gravel rests on top of the box. The coefficients of friction between the box and roof are shown. The system is not moving. Find out the friction force on the bag of gravel.
An electric field of 8.60 x 107 V/m is desired between two parallel plates, each of area 35.0 cm2 and separated by 2.45 mm of air. What charge must be on each plate.
A string 2.0 long with a mass of 2.6 is stretched between two fixed points with a tension of 85. Find the frequency of the fundamental on this string
A 20.0 cm \times 20.0 cm square loop of wire lies in the xy-plane with its bottom edge on the x-axis. The resistance of the loop is 0.550 {\Omega}. What is the size of the induced current in the loop at t=0.510
An automobile tire is rated to last for 35,000 miles. To an order of magnitude, through how many revolutions will it turn
A 5.0 kg mass experiences a force of 40 N when placed a height of 5 km. What is the value of acceleration due to gravity at this point
A student uses an audio oscillator of adjustable frequency to measure the depth of a water well. how many antinodes are in the standing wave
Two identical conducting small spheres are placed with their centers 0.395 m apart. Find the electric force exerted by one sphere on the other
A cart of mass 6.8 kg is moving with a velocity of 15.2 m/s. It makes a head-on perfectly inelastic collision with a stationary cart B with mass 6.4 kg causing them to travel with the velocity 7.63 m/s. What is the velocity of cart B.
A spherical capacitor contains a charge of 3.00 nC when connected to a potential difference of 210 Volt. Compute the electric field just outside the surface of the inner sphere
A photon scatters off an electron at an angle of 180° with respect to its initial motion. What is the change in the photon's wavelength
Monochromatic light falls on two very narrow slits 0.044mm apart. Successive fringes on a screen 6.90m away are 8.2cm apart near the center of the pattern. Determine the wavelength of the light
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