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a pendulum consists of a mass m 0080 kg hanging from a flexible string of length l the string is very thin very light
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a certain waffle iron is rated at 066 kw when connected to a 120-v sourcea what current does the waffle iron carryb
at a tea party a coffeepot and a teapot are placed upon the serving table the coffeepot is a shiny silver-plated pot
a mass on a spring vibrates in simple harmonic motion at a frequency of 40 hz and an amplitude of 80 cm if a timer is
a motor has an internal resistance of 12 ohms when running the motor has a back emf of 30 v and draws a current of 40 a
a teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a
water flows through two garden hoses the large diameter hose is connected to the end of the small diameter hose let the
jerry applies a force of 155 n to the propeller the distance of the from where the force was applied to the axis of
a frictionless spring of spring constant 500 nm has one end attached to a vertical wall and the other end to a block of
the pressure in an automobile tire is usually quoted in the united states in pounds per square inch lbin2 and in a
a liquid 165 gcm3 flows through a horizontal pipe of varying cross section as in the figure below in the first
1 two bars a and b each of length 20 m and cross sectional area 10 m2 are placed end to end as shown in the figure the
suppose 115 mol of oxygen is heated at constant pressure of 075 atm from 130deg c to 220deg ca how much heat is
a wheel initially rotating at an angular speed of 14 rads turns through 30 revolutions during the time that it is
about 50000 years ago a meteor crashed into the earth near present-day flagstaff arizona recent 2005 measurements
a ball of mass 065 kg is fired with velocity 120 ms into the barrel of a spring gun of mass 24 kg initially at rest on
a 5439 n car traveling at 52ms up an incline that is at an angle of 50 degrees about the horizontal brakes coming to
a block is dropped onto a spring with a spring constant k of 27 nm the block has a speed of 22 ms just before it
a marble with a mass m of 300 g is released from rest in a bottle of syrup its terminal speed vt is 181 cmsa presuming
a boat floating in fresh water displaces water weighing 330 kna what is the weight of the water that this boat
a light spring-gun projectile launcher is mounted on an 0463 kg air track glider the gun points upward at an angle of
a nuclear power plant has an electrical power output of 900 mw and operates with an efficiency of 32 if excess energy
a 42-kg girl is standing on a 125-kg plank the plank originally at rest is free to slide on a frozen lake which is a
it is important for the body to have mechanisms to effectively cool itself if not moderate exercise could easily