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A horizontal wire is hung from the ceiling of a room by two mass less strings. The wire has a length of 0.20 m and a mass of 0.080 kg. A uniform magnetic field of magnitude 0.070 T is directed from the ceiling to the floor. When a current of I = 42 A exists in the wire, the wire swings upward and, at equilibrium, makes an angle ? with respect to the vertical. Find (a) the angle ? and (b) the tension in each of the two strings.
When the Sun is directly overhead, a hawk dives toward the ground with a constant velocity of 5.30 m/s at 68.5° below the horizontal
A can of paint (volume = 3.74 10-3 m3) covers an area of 40.0 m2. What is the thickness of the paint on the wall
What is the minimum coefficient of static friction between the road and the tires on a car for the car to go around a flat curve at 45.0 mph
A projectile fired from a gun has initial horizontal and vertical components of velocity equal to 30 m/s and 40 m/s, respectively. Determine the Range of the projectile
A collision between two pucks on an air-hockey table. Puck A has a mass of 0.025 kg and is moving along the x-axis with a velocity of +5.5 m/s. It makes a collison with puck B, which has a mass of 0.050 kg and is initially at rest.
Water flowing through a 1.7cm -diameter pipe can fill a 100L bathtub in 5.3min. compute the speed of the water in the pipe
A battery charger is connected to a dead battery and delivers a current of 3.7 A for 2.1 hours, How much energy is delivered to the battery
One mole of an ideal gas at 0?C is held at a constant volume of 98 liter. Find the change in pressure if the tempera- ture increases by 73 ?C
what is the weight of sea water displaced by a boat weighing 120kN? d=1300 Kg/m^3 what is the volume of the sea water displaced by the boat
Assume that the air temperature is 20C and that no wind is blowing. How much time would elapse if the wind were blowing toward the observer at 33.0Km/h from where the rail was struck?
A 5?, 10?, and 15? resistor are connected in parallel and the combination connected in parallel to a 15 V battery with negligible resistance. What is the current through the battery
One end of a spring is attached to a wall. A 28N pull on the other end causes the spring to stretch by 2.8cm, What is the spring constant
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