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a thin uniform rectangular sign hangs vertically above the door of a shop the sign is hinged to a stationary horizontal rod along its top edge the
a bubble located 0200m beneath the surface of a beer rises to the top the air pressure at the top is 101 x 105paassume that at the density of beer is
in a very large closed tank the absolute pressure of teh air above the water is 601x 105 pa the water leaves the bottom of the tank through a nozzle
an automobile fuel tank is filled to the brim with45 l of gasoline 12 gal at 20degcimmediately afterward the vehicle is parked in the sunlight where
concept you are moving into an apartment and take the elevator to the 6th floor does the force exerted on you by the elevator do positive or negative
a satellite has a mass of 5900 kg and is in a circular orbit 30 x 105 m above the surface of a planet the period of the orbit is two hours the
interference of rectangular pulses two rectangular wave pulses are on a stretched string traveling toward each other each pulse is traveling with a
on the planet newtonia a simple pendulum having a bob with mass 125 kg and a length of 1850 cm takes 142 seconds when released from rest to swing
there is a clever kitchen gadget for drying lettuce leaves after you wash them it consists of a cylindrical container mounted so that it can be
adolf and ed are wearing harnesses and are hanging from the ceiling by means of ropes attached to them they are face to face and push off against one
a hydrogen atom is in the ground state it absorbs energy and makes a transition to the n 3excited state the atom returns to the ground state
a bar of length l is clamped at x0 and loaded with a mass mat xla apply these boundary conditions to equation xa ewtkxbewt- kx and thereby
a dart gun is fired while being held horizontally at a height of080 m above ground level and while it is at rest relative to the ground the dart from
a student throws a set of keys vertically upward to his fraternity brother who is in a window 440 m above the brothers outstretched hand catches the
a ski starts from rest and slides down a 20 degree incline 100meters long a if the coefficient of friction is 090 what is the the skis speed at the
an open barge has the dimensions 22x40x12m if the bargeis made out of 40-cm-thick steel plate on each of its four sides and its bottom what mass of
a 20 kg tumor is being irradiated by a radioactive source the tumor receives an absorbed dose of 12 gy in a time of880 s each disintegration of the
a sled slides down a frictionless track and loops the loop without falling off what is the minimum value of h in terms of rthe only other
you pull a simple pendulum of length 0240 m to the side through an angle of 350 degrees and release it a how much time does it take the pendulum bob
find the lowest frequency for which destructive interferencetwo loudspeakers a and b are driven by the same amplifier and emit sinusoidal waves in
as ice floats in water about 10 of the ice floats above the surface of the water if we float some ice in a glass of water what happens to the water
a point charge q is imbedded at the center of a sphere of linear dielectric material with susceptibility and radiusr find the electric field the
find the speed of the wavea copper wire whose cross-sectional area is 11 x 10-6 m2has a linear density of 70 x 10-3kgm and is sturng between
a microphone is attached to a spring that is suspended from the ceiling directly below on the floor is a stationary 440 hzsource of sound the
two arrows are fired horizontally with the same speed of250 ms each arrow has a mass of0116 kg one is fired due east and the other due south find the