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a light bulb is connected to a 240-v wall socket the current in the bulb depends on the time t according to the
the recovery time of a hot water heater is the time required to heat all the water in the unit to the desired
an unidentified flying object ufo flashes across the night sky a ufo enthusiast on the top of pikes peak determines
a spaceship is measured to be 186 m long while at rest relative to the observer if this spaceship now flies by the
you must determine the acceleration of a rocket so that its equipment can be deisgned to survive the rocket will have a
a particle travels 19 times around a 10-cm radius circle in 36 seconds what is the average speed in ms of the
a satellite is in geosynchronous orbitwhat is the satellites speedwhat additional speed is required for the satellite
a 150 watt computer computer plus flat panel monitor is turned on 80 hours per day if electricity costs 015kwh how much
a solar cell 30cm square has an output of 350ma at 080v when exposed to full sunlight a solar panel that delivers close
a 4958-kg truck traveling with a velocity of 187 ms due east collides head-on with a 1695-kg car traveling with a
the ground state energy of an electron in an infinite square well is 324 x 10-3ev what is the width of the square
a beam of protons at an accelerator creates a current of 164ua if the beam is focused on a target how many protons
a penny has a mass of 25 and is 15 thick a nickel has a mass of 57 and is 19 thickif you make a stack of coins on a
the crew of a rocket that is moving away from the earth launches an escape pod which they measure to be 55 m long the
suppose one gallon of gasoline produces 11 108 j of energy and this energy is sufficient to operate a car for 43 miles
a spacecraft has a nonrelativistic or classical momentum whose magnitude is 70 1012 kg middot ms the spacecraft moves
starting from rest your friend dives from a high cliff into a deep lake below yelling in excitement at the thrill of
a large pot is placed on a stove and 12 kg of water at 14degc is added to the pot the temperature of the water is
resistors of values 80 120 and 240 are connected in parallel across a fresh battery which resistor dissipates the
a sled and its rider are moving at a speed of 40 ms along a horizontal stretch of snow the snow exerts a kinetic
a 43-m long plank with a weight of 164 n is place on a dock with 14 m of its length extended over the water the plank
john and david are carrying bob on a uniform horizontal board 89 m long which weighs 211 n bob weighs 542 n and is
a roller in a sheet-metal processing plant has a diameter of 177 m and a mass of 5871 kg assume the roller is a solid
a 49n brick is placed in 1m3 of oil the volume of the oil raises to 1025m3 the weight of the brick in oil at the bottom
a 7500 resistor a 9500 mh inductor and a 5500 f capacitor are connected in series with an ac source with amplitude of