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often when something slides down a ramp we ignore the energy lost due to friction what is a conservation of energy
a tetherball is attached to a pole with a 20-m rope it is circling at 020 revs as the rope wraps around the pole it
an object is placed 52 cm in front of a circular converging mirrornbspa real image forms 162 cm in front of the
an object is placed 49 cm in front of a converging lens an image forms which has a magnification of 226 and is inverted
a car is moving down a flat horizontal highway at a constant speed of 210msnbspwhen suddenly a rock dropped from rest
suppose that you have a certain spring to which you add weights the spring does not stretch until you add 10 n but it
charges accelerated and then subject to b-fielda a proton is given kinetic energy of 0200 kevi what potential
because gasoline is less dense than water drums containing gasoline will float in water suppose a 210-l steel drum is
how are methanol and ethanol similar in chemical and physical properties and how are they different which one is used
what is a stationary state in quantum mechanics and if our system is in stationary state we have time independent
a plane on a mission to deliver food to hungry people is traveling parallel to the ground at a speed of 3400 kmh as the
for a saturated soil sample with a void ratio of 0720 and a saturated density of 1820 tm3calculate the volume of solids
a car traveling at 600 kmh collides with a stationary truck the car has a mass of 8400 kg and the truck has a mass of
it takes 212 seconds to hoist a rescue diver of mass 81 kg from the ocean surface to a helicopter hovering 208 meters
1 a 100-kg box on the right and a 45-kg box on the left are tied together by a horizontal cable the 100-kg box is acted
as we all know in quantum mechanics there are many of operators so how to understand those operators for example the
critical angle for water-air boundarya small underwater pool light is 100 m below the surface what is the diameter of
polarizationa beam of unpolarized light is sent through two polarizing sheets placed one on top of the other what must
pair productiona gammaray interacts with the strong electric field of a nucleus and undergoes pair production the
de broglie wavelengtha what is the kinetic energy of electrons whose de broglie wavelength matches the size of a
industrial buildings have fresh air requirements depending on the occupancy level and its function assume 15000 cfm of
bryan allen pedaled a human-powered aircraft across the english channel from the cliffs of dover to cap gis-nez on june
a projectile is launched at ground level with an initial speed of 500 ms at an angle of 300 above the horizontal it
1 a positive charge of 18nc is evenly distributed along a straight rod of length 40 m that is bent into a circular arc
1 how much oil is consumed daily in the us in barrels in gallons how much of each barrel is used to produce gasoline