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a balloon is released from a tall building the total mass of the balloon including the enclosed gas is 16 kg its volume
johnie wants to go sailing but their is no wind johnie mounts an industrial fan on his sail boat with a 40 n force the
a 10-kg block starts from rest on an incline after 1 second the block travels at 12 ms 1 meter down the incline what is
radiotelescopes are designed to observe 21-cmwaves emitted by atomic hydrogen gas a signal from a distant
a 65 kg high jumper starts his push-off phase with his center of mass 45 m above groung and velocity of 0 ms at the end
a uniform beam having a mass of 60 kg and a length of 28 m is held in place at its lower end by a pin its lower end is
unpolarized light with intensity io passes through two polarizers the transmission of the one is vertical and that of
a javelin thrower releases a javelin 150 meters above the ground at an angle of 480 degrees if the javelin travels a
a uniform ladder is 10-m long and it weighs 100-n the ladder leans against a smooth wall with its base on a sidewalk
a pendulum bob passes through the lowest part of its path at speed of 2 msa what is the tension in the pendulum cable
the height of a helicopter is given by h1505t2 where h is in meters and s is in seconds after 5s the helicopter
a sample of blood is placed in a centrifuge of radius 120 cm the mass of a red blood cell is 30 1016 kg and the
the height of a helicopter is given by h1505t3 where h is in meters and s is in seconds after 5s the helicopter
a 4-kg mass is connected by a light cord passing over a pulley to a 2-kg mass the pulley rotates about a frictionless
a test rocket is fired straight up from rest with a net acceleration of 20 ms2 after 4 seconds the motor turns off but
a pinecone falls straight down from a pine tree growing on a 20 degree slope the pinecone hits the ground with a speed
an empty rubber balloon has a mass of 10-g the balloon is filled with helium at a density of 181-kgm3 at this density
the pressure of air in your house can stay constant during the day if the temperature rises let the temperature be 295
a small asteroid is discovered in a circular orbit around a larger asteroid at a distance of 1939 km the period of the
a container is filled 0500m deep with mercurya what is the pressure at the bottom of the vesselb a block of lead is
a hollow cube with 12 cm in each side and thickness 1 cm floats half submerged in a liquid of density kgm3 find the
a plano convex lens is placed convex side down on a plane glass plate and illuminated from the above with red loght of
spherical mirror has a focal length of 10 cm find location and then describe image for an object distance of 25 cm
a cyclist starts from rest and coasts down a 65 hill the mass of the cyclist plus bicycle is 95kg the cyclist has
a vertical solid steel post of diameter d 231 cm and length l236 m is required to support a load of mass m 8260 kg