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Four point charges have the identical magnitude of 2.52 x 10-12 C and are fixed to the corners of a square that is 4.02 centimeter on a side. Three of the charges are positive and one is negative. Find the magnitude of the net electric field that exists at the center of this square?
Someone decides to produce electrical power by turning a coil with 10^5 circular loops in the Earth's magnetic field. determine the average power obtained from this device
A spherical aluminum ball of mass 1.56kg contains an empty spherical cavity that is concentric with the ball. The ball just barely floats in water. Evaluate the radius of the cavity
An object is moving along a straight line and the uncertainty in its position is 1.5 m. Find the minimum uncertainty in the momentum of the object
An air-filled parallel-plate capacitor has a capacitance of 1.4 pF. The separation of the plates is doubled and wax is inserted among them. The new capacitance is 2.1 pF. Discover the dielectric constant of the wax.
A 100 gram piece of gold that is heated to 160 C and placed in 200 g of 20 C water. Determine what is the equilibrium temperature if the specific heat of gold is 0.128J/gC
a brass cylindrical bar at 300 k has a diameter of exactly 40 mm. an aluminum ring has an inner diameter which is
A guitar string is 91.00cm long and has a mass of 3.6g. From the bridge to the support post (= L) is 60 cm, and the string is under a tension of 551 N.
A long air-core solenoid of 420 turns, length 32 cm anddameter 3.0 cm carries a current 3.0 A at certain time. The current is increasing at a rate of 15 A/s.
A kid of mass 20kg is playing with a swing with an arm length of 5 m. His sister first pushes him such that the maximum angular deviation from vertical position is 0.2 radian (11.46 deg.).
Monochromatic light falls on a slit that is 2.60*10-3 mm wide. If the angle between the first darkfringes on either side of the central maximum is 35.0degrees(dark fringe to dark fringe), what is the wavelength of the light used
A 6.03-g bullet is moving horizontally with a velocity of +342 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). What is the velocity of the second block after the bullet imbeds itself
a 2.0 kg box rests on a plank that is inclined at an angle of 65deg above the horizontal. the upper end of the box is
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