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Q. A 0.400 kg object is swung in a vertical circular path on a string 0.500 m long. If its speed is 4.10 m/s at the top of the circle, what is the tension in the string there?
Q. An electron moves at right angles to a magnetic field of 0.109 T. What is its speed if the force exerted on it is 9×10-15 N?
If the initial temperature of the horseshoe is 450 °C, and the initial temperature of the water is 45° C, what is the equilibrium temperature of the system? Presume no heat is exchanged with the surroundings.
What should the charge (sign and magnitude) of a particle of mass 1.487 be for it to remain stationary while placed in a downward-directed electric field of magnitude 630.
A 100 ball on a 60 long string is swung in a vertical circle whose center is 200 above the floor. The string suddenly breaks when it is parallel to the ground and the ball is moving upward. The ball reaches a height 600 above the floor.What is the..
An electric field of 254,000 N/C points due west at the certain spot. What are the magnitude and direction of the force that acts on the charge of -8.1 µC at this spot.
Assume that, when Hiawatha aims vertically, his arrow reaches a maximum height of 20 m. Use this fact to find the initial speed u with which Hiawatha can launch the arrow vertically.
approsimate the terminal speed of a wooden sphere (density 0.890 g/cm3) falling through air, if its radius is 9.00 cm and its drag coefficient is 0.500. (The density of air is 1.20 kg/m3.)
The longest recorded pass in an NFL game traveled 86 yards in the air from the quarterback to the receiver.Assuming that the pass was thrown at the optimal 45 angle, what was speed at which the ball left the quarterback's hand.
The tuner starts with the tension in the E string a little low, after that tightens it. What is the frequency of the E string while she hears four beats per second.
What are the displacement and velocity of the point on the cord. What is the magnitude of the acceleration of one of the liners toward the other because of their mutual gravitational attraction.
A highway curve has a radius of 125 m. At what angle should the road be banked so that a car traveling at 27.4 m/s has no tendency to skid sideways on the road.Find an acceleration of box and ramp.
Calculate the magnitude of B when the force on wire. The time constant of an RC circuit is 5.5 s. How much time t is required for the capacitor (uncharged initially) to gain one-half of its full equilibrium charge.
If the two balls started rolling at the same time at a point 1.2 m behind the edge of the table, will they reach the floor at the same time? define.
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