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a soccer player kicks the ball toward a goal that is 370 m in front of him the ball leaves his foot at a speed of 288
a factory worker pushes a 287 crate a distance of 49 along a level floor at constant velocity by pushing downward at an
a student of mass m 49 kg wants to measure the mass of a playground merry-go-round which consists of a solid metal
inside of a nucleus nucleons protons and neutrons are confined within dimensions of 15x10-15m treating nucleons are
can a system whose momentum is conserved be made up of smaller systems whose individual momenta are not conserved
a 05 m3 rigid vessel initially contains saturated liquid-vapor mixture of water at 100deg c the water is now heated
a ballistic pendulum consists of an arm of mass m and length l 051 m one end of the arm is pivoted so that the arm
a temperature controller designed to work in an atmosphere containing steam a bimetallic strip of brass and steel built
gold which has a density of 1932 gcm3 is the most ductile metal and can be pressed into a thin leaf or drawn out into a
a child builds a simple cart consisting of a 060 m by 120 m sheet of plywood of mass 85 kg and four wheels each 200 cm
for a particle on in a box running between x0 and x1 the function cosn pi x is not a satisfactory solution the function
at what minimum speed must a roller coaster be traveling when upside down at the top of a circle fig 5-34 if the
662 kev photons are emitted as a result of the decay of 137cs these photons undergo compton scatteringi what is the
a bullet is fired horizontally at 800 ms and strikes a target that is 160 m from the gun if the marksman hears the
an isolated hydrogen atom possesses a hyperfine interaction between the proton and electron spins sp and se that takes
a thin uniform rod length 11 m mass 42 kg is pivoted about a horizontal frictionless pin through one of its ends the
suppose a 2000 watt laser beam is concentrated by lens a into a cross-sectional area of about 1 x 10-6 cm2 find the
if a solid is not completely submerged in the water will this technique error increase decrease or have no effect on
the greatest height reported for a jump into an airbag is 994 m by stuntman dan koko in 1948 he jumped from rest from
at 900k the following reaction has kp0345 2so2 o2-gt2so3 in an equilibruim mixture the partial pressure of so2 and o2
a 90 capacitor that had been charged to 30 is discharged through a resistor the figure figure 1 shows the capacitor
if the velocity of a 30 kg body changes fromv1 30icirc 50j ms to v2 0icirc 70j ms in a time interval of 20sa what is
a solid conducting sphere of radius 200cm has a charge 1500muc a conducting spherical shell of inner radius 400cm and
at 218 c kc12x10-4 for the equilibruim nh4hs-gtnh3 h2s calculate the equilibruim concentration of nh3 and h2s if a
a boat clashed on something and fell to the ocean floor a few years later a few researchers sent a robot and found out