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A horizontal wire rod is free to slide on a vertical conducting. The wire has mass 7 kg and length 7 m. It maintains good contact with the conducting frame. The resistance of the circuit is 4 .. A uniform magnetic field with magnitude 7 T is directed perpendicular to the frame (into the page). The wire will accelerate downward until the upward force on the wire (due to the interaction of the current with the magnetic field) balances the gravitational force. Neglecting frictional e.ects, find the terminal velocity of the wire. Answer in units of m/s.
A cosmic ray proton streaks through the lab with velocity 0.80c at an angle of 55° with the +x direction (in the xy plane of the lab). Compute the magnitude and direction of the proton's velocity
A 120 W lightbulb and a 90.0 W lightbulb are connected in a series. what is the current through the two bulbs
A 2.18-m-long diving board of mass 13.2 kg is 3.00 m above the water. It has two attachments holding it in place. what are the forces acting on the two attachments
According to a report on traumatic brain injury, the force that a professional boxer's fist exerts on his opponents head is equivalent to being hit with a 5.9 kg bowling ball traveling at 8.9 m/s that stops in .018s
A research submarine has a 10-cm-diameter window that is 8.5cm thick. What is the submarine's maximum safe depth in salt water
The distance from Planet X to a nearby star is 12 light-years (a light-year is the distance light travels in a year) measured in the rest frame of Planet X. How long will the trip take according to a clock fixed on Planet X
An empty parallel plate capacitor is connected between the terminals of a 10.2-V battery and charges up. what is the new voltage between the plates of the capacitor
A ball with a mass of 0.580 is initially at rest. It is struck by a second ball having a mass of 0.415 , initially moving with a velocity of 0.260 toward the right along the axis. What is the change in the total kinetic energy of the two balls
A skier wears a goose down jacket of thickness 3.75cm and total surface area of 1.25m^2. determine the temperature at the surface of the skin
Calculate the location of the center of mass of the earth-moon system (that is, find the distance of the center of mass from the earth's center)
Identical samples containing 32P are measured for a period of 1 hr in a counter having an efficiency of 44 percent and a negligible background. From a large number of observations, the mean number of counts in 1 hr is (2.93 x 10^4)
You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor at constant speed. What is the work done by friction on the crate
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