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at normal incidence the intensity of sunlight at the earth is 1400 wm2 assume for simplicity that all of the incident
the blades of a kitchen blender rotate counterclockwise at 22times104 rpm revolutions per minute at top speed it takes
a solar energy farm produces 10 mw of power for a small town the solar cells used convert incoming solar energy to
a guitar string is vibrating in its fundamental mode with nodes at each end the length of the segment of the string
glenn starts his day by walking around a circular track with radius 48 m for 15 minutes first he walks in a
a bullet with mass 20 grams and velocity 100 ms collides with a wooden block of mass 2kg the wooden block is initially
you are standing at the rear end of a raft that is 60 m long the raft has a uniform mass of 120 kg and is at rest on a
for a dispersing prism with an index of 15 and an apex angle of 60 degrees find the minimum angle deviation of light
a tank of argon gas has a volume of 00152 m3 the gas has a pressure of 550 atm and a temperature of 293 khow many argon
low-frequency vertical oscillations are one possible cause of motion sickness with 040 having the strongest effect your
a thin double convex glass lens with an index of 156 while surrounded by air has a 10 cm focal length if it is placed
two positive charges each of magnitude 4 x 10-6c are located a distance of 8 cm from each other what is the magnitude
one end of a horizontal rope is attached to a prong of an electrically driven tuning fork that vibrates at a frequency
a beam of 12 cm microwaves strikes a surface glass with an index of 15 at an incident angle of 45 degrees compute the
an object is located to the left of a concave lens whose focal length is -40 cm the magnification produced by the lens
a 12uf capacitor a 10kohms resistor a 200 volt battery and a switch are all connected in a seriesa draw the circuitb
a beam of quasimonochromatic light having an irradiance of 500 watts per square meter is incident in air and
two identical brass balls mounted on wooded posts initally have different amounts of charge one 3uc and the other 15uc
a long string carries a wave a 400-m segment of the string contains four complete wavelengths and has a mass of 180 g
a container explodes and breaks into three fragments that fly off 120 degrees apart from each other with mass ration
a 20 g plastic ball is moving to the left at 35 ms how much work must be done on the ball to cause it to move to the
a 40 g marble moving at 20 ms strikes a 22 g marble at rest what is the speed of each marble immediately after the
a 16 kg child slides down a 31 m-high playground slide she starts from rest and her speed at the bottom is 24 mswhat is
an accelerating voltage of 2415 v is applied to an electron gun producing a beam of electrons originally traveling
a tungsten target is struck by electrons that have been accelerated from rest through a 291-kv potential difference