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the little dutch boy saved holland by sticking his finger in the leaking dike if the water level was 25 m above his
a a man weighing 720 n lies on a bed of nails find the average pressure exerted by a nail on his skin if there are 1210
by how much does the air pressure in a house increase if the house is sealed and the air temperature increases from
gas is contained in an 82 l vessel at a temperature of 70c and a pressure of 92 atmfind the number of moles of gas in
fred mass 72 kg is running with the football at a speed of 58 ms when he is met head-on by brutus mass 120 kg who is
a driver measures her cold tire gauge pressure to be 197 105 pa the measurement is made before driving when the tires
when empty a particular helicopter of mass 3770 kg can accelerate straight upward at a maximum acceleration of 130 ms2
one mole of an ideal gas at 0c is held at a constant volume of 98 liter find the change in pressure if the tempera-
you somehow manage to get a gold ring with inner diameter 219 cm stuck on your finger even though your knuckle has a
a pyrex flask in a refrigerator at 1c is filled to the top and holds exactly 1000 cm3 of ethyl alcohol if the
a penny is dropped form the observation deck of the empire state building 369m above the ground with what velocity does
the temperature of a 28 m copper pipe is raised from 46c to 873cwhat is its change in length assume the coefficient of
a roller coaster is traveling at 5 ms at the top of a hill 40 m above the ground what is the speed of the roller
the focal length of the eyepiece of a certain microscope is 185 mm the focal length of the objective is 785 mm the
a ball is thrown straight up in the air at an initial speed of 30 ms using conservation of energy find the maximum
an insect 11 tall is placed 13 beyond the focal point of the objective lens of a compound microscope the objective lens
a point on the rim of a 025-m-radius rotating wheel has a centripetal acceleration of 40 ms2 what is the angular speed
due to a temperature difference t heat is conducted through a brass plate that is 0027 m thick the plate is then
a catapult with a radial arm 419 m long accelerates a ball of mass 191 kg through a quarter circle the ball leaves the
sunlight reaches the surface of the earth with a total intensity of about 1200 wm2 this sunlight shines at an angle of
a piece of wood is 0640m long 0230m wide and 700times102 m thicka its density is 600 kgm3 what volume of lead must be
a hollow plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake the
an ore sample weighs 175n in air when the sample is suspended by a light cord and totally immersed in water the tension
a circuit has a 12 v source connected to a 5 ohm resistor and 7 ohm resistor in series a current of 1 a flow through
when a switch is closed the current in a wire is given as it 10aexp-5ta how much charge flows out 20s after the switch