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two small metallic spheres each of mass m 045 g are suspended as pendulums by light strings from a common point the
a big yo-yo radius 02 meters mass 20 kg has a string wrapped about its circumference if yo-yo falls how much time does
a uniform bridge is 100 m long and weighs 200 n if a small car weighing 40 n is 37 m from on end of the bridge how much
the carts of a roller coaster are traveling 2 ms over the top of the first hill if there is no energy loss due to
a pulley system lifts 400n to height of 15 meters in 6 seconds how much work is done on the object what power was
a bottle rocket is launched at an angle of 30 degrees from the ground with a speed of 200ms what is the range of the
a hubcap comes off a car that is traveling 100ms if it stops rolling after traveling 25 ma how many revolutions did it
a submarine sends a sonar signal which returns from another ship 2250 s later how far away is the other ship if the
a merry-go-round rotates at 5 rpm and is shaped like a disc with a radius of 3 m and a mass of 100kg if a child m40 kg
an echo bounces from a building exactly 100 s after you honk your horn how many feet away is the building if the air
a 58 kg gymnast does a vault he is traveling at 56 ms just before he lands he comes to a stop in 008 s what is the
a spacecraft consists of a 32500 kg engine and a 12600 kg nosecone the rocket is initially traveling at 22000 ms when
a common flashlight bulb is rated at 0270 a and 336 v the values of current and voltage under operating conditions if
a copper wire and an aluminum wire of the same length have the same resistance what is the ratio of the diameter of the
sound from the siren of an emergency vehicle has a frequency of 7500 hz and moves with a velocity of 3430 ms what is
when a mercury manometer is connected to a gas main the mercury stands 489 cm higher in the tube that is open to the
a hydraulic lift is lifting a car that weighs 13 kn the area of the piston supporting the car is a the area of the
if we drop a small metal sphere into the water and watch its motion it will quickly reach terminal velocity if that
an ideal gas undergoes isothermal compression from an initial volume of 537 m3 to a final volume of 227 m3 there is 645
an ideal refrigerator does 160 j of work to remove 570 j of heat from its cold compartment during each cyclewhat is the
a 984-kg satellite orbits the earth at a constant altitude of 106-kma how much energy must be added to the system to
a uniform circular disk has radius 35 cm and mass 350 g and its center is at the origin then a circular hole of radius
an electric fan is running on high after fan has been running of 132 minutes the low button is pushed the fan slows
a 30 g steel ball bounces elastically on a steel plate always returning to the same maximum height h 142 mwhat is the
an l-r-c circuit operating at 60 hz has an inductor with an inductance of 153x10-3 h a capacitance of 167x10-2 f and