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Two pieces of the same wire have the same length. From one piece, asquare coil containing a single loop is made. From the other, acircular coil containing a single loop is made. The coils carrydifferent currents. When placed in the same magnetic field with thesame orientation, they experience the same torque. What is theratio Isquare / Icircle ofthe current in the square coil to the current in the circular coil?
The coefficient of kinetic friction between the block and incline is = 0.45. The mass of the spring is negligible.
The plates of a parallel plate capacitor are separated by d = 2.8 cm. The potential of the negative plate is 0 V, and the potential halfway between the plates is +15 V. What is the electric field between plates (take the upward direction as the po..
a water hose is used to fill a large cylindrical storage tank of diameter d and height 2d. the hose shoots the water at
A cart traveling at 0.3 m/s collides with stationary object. After the collision, the cart rebounds in the opposite direction. In which collision is the impulse on the cart greater
A lead pellet with a mass of 0.519 g is shot from an air gun at a speed of 118 m/s. It is stopped by a boulder. What is the temperature change of the bullet
The Earth's distance from the sun varies from 1.465 x 108 kmto 1.518 x 108 kmduring the year. Take the Sun to be at rest. Determine the difference in the Earth's kinetic energy
a hollow charged conductor has a tiny hole cut into its surface. show that the electric field in the hole is where is
In a double-slit experiment, slits separated by 1.290e-4 m are illuminated by a coherent 571 nm light source. What is the angular position of the first bright fringe
a parallel plate capacitor of capacitance c0 has plates of area a with separation d between them. when it is connected
What is the magnitude of the net torque exerted on the branch by the children? Suppose that the axis is located where the branch joins the tree trunk and is perpendicular to the plane formed by the branch and the trunk.
An object with mass m = 1.1 g and charge q is placed at point A, which is 0.05 m above an infinitely large, uniformly charged, nonconducting sheet (? = -5.4 10-5 C/m2), as shown in the figure. Gravity is acting downward (g = 9.81 m/s2). Determine the..
A 0.030 kg lead bullet hits a steel plate, both initially at 20?C. The bullet melts and splatters on impact. How much heat is required to increase the temperature of the lead bullet and melt it
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