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A fighter jet is launched from an aircraft carrier with the aid ofits own engines and a steam-powered catapult. The thrust of itsengines is 3.44 x 105 N. In being launched from rest itmoves through a distance of 59.7 m and has a kinetic energy of 7.34x 107 J at lift-off. What is the work done on the jet by the catapult?
The needle of a sewing machine moves up and down in the same hermonic motion its driving force comes from a rotating wheel that is powered by an electric motor. how do you imagine that theup-and-down needle comapres with the period of the rotating..
A window air conditioner uses 1392 W of electricity and has a coefficient of performance of 2.47. How much work will be done by the air conditioner during the process of cooling the room
A120g copper bowl contains185g of water, both at 20.0°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, How much energy (in calories) is transferred to the bowl
A ship on the surface of the ocean receives a sonar echo back from an underwater object. What is the distance of the object from the ship
In a model AC generator, a 500-turn rectangular coil 8.00cm by 20.0cm rotates at 120rpm in a uniform magnetic field of 0.600T. What is the maximum emf induced in the coil
a 208-g aluminum calorimeter contains 648 g of water at 18deg c. a 105-g piece of ice cooled to -18deg c is placed in
You discover a new extra-solar planet orbiting a 1 solar mass star using high spatial resolution imaging and adaptive optics in the infrared part of the spectrum. What is the planet-star separation if you measure an angular separation of 0.6"
A radio tuner is built by connecting an L=0.48mH inductor and variable capacitor in series with an antenna. What is the quality factor of the circuit with the capacitance you found
a boat traveling at a speed of 12km/h takes 36 minutes to travel 9 km down a river. How long will it take the boat to return to the starting point
q1. a 484g oscillator has a speed of 121 cms when its displacement is 2.10 cm and 56.0 cms when its displacement is
a persons metabolic rate can be measured using what is called a flow calorimeter. the person is placed in a large
When you weigh yourself on good old terra firma (solid ground), your weight is 144 lb . In an elevator your apparent weight is 124 lb.What is the magnitude of the elevator's acceleration? What is the direction of the elevators acceleration?
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