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Assuming no heat loss to the surrounding environment, determine the minimum duration of time necessary for a 100 W aquarium tank heater to raise the temperature of 20.0 gallons of water by a difference of 10.0°C.
A 0.39 V potential di?erence is maintained across a 1.7 m length of tungsten wire that has a cross-sectional area of 0.85 mm2, What is the current in the wire
a snowboarder that weighs 80 kg starts from rest at the top of the hill with a downward slope of 30 degrees from the horizontal. What is the coeffient of kinetic friction
find the magnitude of the acceleration of the boy. Find the average magnitude of the induced emf if the change in shape occurs in 4.14 s, and the local 0.120 T magnetic field is perpendicular to the plane of the loop.
a moving rod is observed to have a lenght of 2m and to be oriented at an angle of 30 degrees with respect to the direction of motion. what is the orentation angle in the proper frame
A race car is making a U-turn at constant speed. The coefficient of friction between the tires and the track is ?s = 1.79. what is the maximum speed at which the car can turn without sliding
q1. a beam of light strikes a sheet of glass at an angle of 57.0circ with the normal in air. you observe that red light
The current through a 50-? resistor is I= 0.80 sin(240 t). How much power on average is dissipated in the resistor
The spaceship Enterprise 1 is moving directly away from earth at a velocity that an earth-based observer measures to be +0.62c. A sister ship, Enterprise 2, is ahead of Enterprise 1 and is also moving directly away from earth along the same line. ..
A 60-W incandescent bulb with a tungsten filament is connected to a 120-V power supply. the power dissipated by the cold bulb is
Two students on roller skates stand face-to-face, then push each other away. One student has a mass of 99 kg and the second student 68 kg. Find the ratio of the magnitude of the first student's velocity to the magnitude of the second student's velo..
An aluminum ring has an inside diameter of 1.793 cm, and an iron rod has a diameter of 1.798 cm, at what common temperature will the ring just slip onto the rod
question a 10-kg box moving at 5 ms on a horizontal frictionless surface runs into a light spring of force constant 100
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