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a meter stick of weight w leans away from a wall the 0 cm line is against the wall at the floor and it makes an angle
sound is passing perpendicularly through an open window whose dimensions are 11 m x 075 m the sound intensity level is
what is the buoyant force on a helium balloon in air if the balloon is spherical with diameter 285cmfb
a cart with mass 470 g moving on a frictionless linear air track at an initial speed of 18 ms undergoes an elastic
suppose the masses of stars are distributed according to fmdm m-2 dm assume you can use the luminostiy mass relation l
a ladder is leaning against a vertical wall the coefficient of friction between the ladder and the horizontal surface
your friend has a near point of 114 cm and she wears contact lenses that have a focal length of 352 cm how close can
a converging lens has a focal length of 7100 cm a 120-cm-tall object is located 1310 cm in front of this lensa what is
lasik eye surgery uses pulses of laser light to shave off tissue from the cornea reshaping it a typical lasik laser
a merry-go-round with moment of inertia of 550 kg m 2 has a boy of mass 45 kg riding in the center of the
a 28 cm tall object is placed in front of a concave mirror with a radius of 33 cm the distance of the object to the
the refractive index of a transparent material can be determined by measuring the critical angle when the solid is in
two astronauts of equal mass 70 kg are holding on to opposite ends of a straight rope in space the length of the rope
sunlight strikes a piece of crown glass at an angle of incidence of 400o calculate the difference in the angle of
a hollow spherical shell with mass 225 rolls without slipping down a 375 slope find the acceleration of the shell find
a laser beam enters a 185 cm thick glass window at an angle of 380deg from the normal the index of refraction of the
a light ray of 430 nm enters at an angle of incidence of 362o from air into a block of plastic its angle of
a sealed cubical container 240 cm on a side contains three times avogadros number of molecules at a temperature of
a styrofoam cup holding 122 g of hot water at 100 102degc cools to room temperature 210degc what is the change in
the average coefficient of volume expansion for carbon tetrachloride is 581 10-4 degc1 if a 565-gal steel container is
a thin transparent film has an index of refraction of 157 it consists of a flat plate with air on both sides of the
an ideal gas at 263degc and a pressure 180 105 pa is in a container having a volume of 100 l a determine the number of
a 500 kg cannon fires a 40 kg projectile with a velocity of 500 ms relative to the ground what is the recoil speed of
a 1800 kg car traveling north at 70 kmh collides at an intersection with a 2000 kg car traveling west - at 57 kmh the
an ideal monatomic gas is allowed to expand quasi-statically and adiabatically from an initial volume vi 41 liter and