QUESTION 23 You take a picture with f-number f-4 and a shutter speed of 1/100 seconds. You change the f-number to f/11 and the shutter speed to 1/50 seconds. The light intensity reaching the sensor has changed by what factor?

Acylindrical specimen of a nickel alloy having an elastic modulus of 207 gpa (30 × 106psi) and an original diameter of 10.2 mm (0.40 in.) experiences only elastic deformation when a tensile load of 8900 n (2000 lbf) is applied. compute the maximum length of the specimen before deformation if the maximum allowable elongation is 0.25 mm (0.010 in.)

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

Abar magnet cut in half will form a total ofpoles. a)fourb)eightc)two