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an orchestra plays a loud symphonic passage at an intensity level of 72db while a very soft solo is only 35db what is
which of the following represents work a compressed spring that is allowed to expand the normal force on a stationary
a hoop is rolling without slipping along a horizontal surface with a speed of 450 ms when it starts up a ramp that
a 44 kg women is in a 62 kg 5 m long boat that is initially at rest she walks from a spot 100 m from one end to a spot
a find the width of the central maximum on a screen located 160 m from the slitb determine the width of the first-order
on apollo moon missions the lunar module would blast off from the moons surface and dock with the command module in
a box of 25cm by 25cm by 25cm is placed in water when a rat is placed on top of the box the box goes down by 2cm what
a 30 kg launching machine fires a 250 gram projectile horizontally at 100 ms this causes the machine to slide backward
a 260-g lead bullet at 280degc is fired at a speed of 230 ms into a large block of ice at 0degc in which it becomes
an aluminum cup of mass 210 g contains 800 g of water in thermal equilibrium at 800degc the combination of cup and
the temperature of a gold bar rises by 100degc when it absorbs 0677 kj of energy by heat the mass of the bar is 525 g
a block of mass 900 g on the end of spring undergoes simple harmonic motion with a frequency of 350 hza what is the
an arrow is shot vertically upward and then 184s later passes the top of a tree 409m high how much longer will the
a jet airliner moving initially at 300 mih due east enters a region where the wind is blowing at120mih in a
a girl delivering newspapers covers her route by traveling600blocks west400blocks north and then300blocks easta what is
a certain freely falling object requires105s to travel the last395m before it hits the ground from what height above
a cessna aircraft has a lift-off speed of 120 kmha what minimum constant acceleration does the aircraft require if the
a transformer is made by winding a primary coil of 270 turns around an iron core a secondary winding of 54 turns is
a single loop of area 0183 m2 is placed perpendicular to a magnetic field of 0304 t the loop is rotated about an axis
a square coil 200 cm times 200 cm that consists of 100 turns of wire rotates about a vertical axis at 1 500 revmin the
an airplane on a carrier is designed so that the speed of the air below the wing is the air speed v of the plane and
a cylinder of wood density 800 kgm3 is 25 m long cross sectional area of the cylinder is 04 m2 a mass of 200 kg is
assume the earths average temperature is 10 degrees c venus is hit by a meteorite and a cloud of dust surrounds the sun
in each of the four scenarios to the right a large bat lets out a short burst of ultrasonic sound which the smaller bat