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A battery charger is associated to a dead battery and delivers a current of 5.1 A for 6.1 hours, keeping the voltage across the battery terminals at 12 V in the procedure. How much energy is delivered to the battery?
An interstate highway has been built through a poor neighborhood ina city. What is the averagelate-night sound level in the room
A filing cabinet weighing 556 N rests on the floor. The coefficient of static friction between it and the floor is 0.68, In which of the attempts does the cabinet move
a bat flies toward a wall emitting a steady sound with a frequency of 24.0 . this bat hears its own sound plus the
The tires of a car make 86 revolutions as the car reduces its speed uniformly from 88.0 km/h to 60.0 km/h. How far does the car go? Find the total distance
A 527-kg hot-air balloon takes off from rest at the surface of the earth. The non-conservative wind and lift forces take the balloon up, doing 377000 J of work on the balloon in the process.At what height above the surface of the earth does the ba..
A cubical block of wood 10cm on a side, floats at the interface between oil and water with its lower surface 1.50 cm below the surface
Find the minimum frequency a photon must have if it is to ionize the n = 1 state of a doubly ionized lithium atom
a lightning bolt strikes one end of a steel lightning rod producing a 15000-a current burst that lasts for 65 micros.
A textbook of mass 2.08kg rests on a frictionless, horizontal surface. What is the tension in the part of the cord attached to the textbook
Two college students having the same mass M roll toward each other on roller blades, each moving at the same speed v. What is the combined momentum of the two skaters?
At 20.0°C, a mainly silicon resistor has a resistance of 395 ?, and a tungsten resistor has a resistance of 752 ?. At what temperature will their resistances be equal
a 250 kg merry-go-round in the shape of a uniform solid horizontal disk of radius 1.50 m is set in motion by wrapping a
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