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a ball is thrown with an initial speed of 600 ms at an angle of 30 degrees above the horizontal what is the balls
a flywheel with a moment of inertia 600 106 kgm2 is spinning with an angular speed of 120 revs about a vertical axis
sulfur-35 is used in some medical procedures the physical half-life of s-35 is 872 days if the effective half-life of
a whale swims due east for a distance of 184 km turns around and goes due west for 351 km and finally turns around
an ancient piece of wood contains 2 grams of carbon and is found to have 10 c-14 disintegrations per minute per gram of
two masses m1 and m2 are connected by a string which goes over an ideal pulley block m1 has a mass of 300 kg and can
the amount of 250 mol of a perfect gas is heated from 1000 k to 3200 k as a result the gas expands against a constant
a solid sphere rolls without slipping from rest down a plane 400 m long inclined at angle of 420 degree with respect to
to prevent damage to floors and to increase friction a crutch will often have a rubber tip attached to its end if the
a playground carousel is rotating counterclockwise about its center on frictionless bearings a person standing still on
a long string is moved up and down with simple harmonic motion with a frequency of 46 hz the string is 579 m long and
a sphere of radius 100 cm floats in equilibrium partially submerged in water with its lowest point 500cm below the
a mass m5kg is attached to a horizontal spring and placed on a frictionless surface the spring-mass system is
a cylinder contains a mixture of helium and argon gas inequilibrium at 160degca what is the average kinetic energy for
a microphone is attached to a spring that is suspended from the ceiling as the drawing indicates directly below on the
changing the reaction buffer to extremly high ph with addition of sodium carbonate is said to stop the reaction what 2
the wheels axle and handles of a wheelbarrow weigh w 66 n the load chamber and its contents weigh wl 621 n the
a standard interior staircase has steps each with a rise height of 20 cm and a run horizontal depth of 25 cm research
in 1956 frank lloyd wright proposed the construction of a mile-high building in chicago suppose the building had been
a 20lb weight is suspended from the end of a vertical spring of negligible mass this much weight stretches the spring
a cart is driven by a large propeller or fan which can accelerate or decelerate the cart the cart starts out at the
a hot air balloon rises from the ground with a velocity of22 msyhat a champagne bottle is opened to celebrate takeoff
a 6kg block sits on a surface with micros05 and microk03 you exert a force f at an angle of 30degon this block1 what is
a dynamics cart with its plunger depressed is placed at a certainheight on a inclined plane at a known angle how can
the pressure gauge on a tank registers the gauge pressure which isthe difference between the interior and exterior