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A 17.0-g piece of Styrofoam carries a net charge of -0.75 µC and is suspended in equilibrium above the center of a large, horizontal sheet of plastic that has a uniform charge density on its s
A soccer player can kick the ball 24m on level ground, with its initial velocity at 45 degrees to the horizontal. At the same initial speed and angle to the horizontal, what horizontal distance can
A heating element is made by maintaining a potential difference of 68.0 V across the length of a Nichrome wire that has a 3.01 × 10-6 m2 cross section. Nichrome has a resistivity of 5.00 ×
Find the magnitude of the electric field at all points in space both inside and outside the slab, in terms of x, the distance measured from the central plane of the slab. What is the field for x = 1
A 2.00 kg particle has the xy coordinates (-1.20 m, 0.500 m) and a 4.00 kg particle has the xy coordinates (0.600 m, -0.750 m). Both lie on a horizontal plane. At what (a) x and (b) y coordinates mu
On the Moon, the acceleration due to the effect of gravity is only about 1/6 of that on Earth. An astronaut whose weight on Earth is 600 N travels to the lunar surface. (a) What is his weight as mea
The reaction force is the force your feet exert on the floor. The floor produces this force. The reaction force is the force the floor exerts on your feet.
We have two stationary point charges q1=3.6e-6 C and q2=6.0e-6 C, seperated by 0.50 m. a) What is the potential energy for an electron at the midpoint between the charges?
Find the electric field at radial points r where r = 11.2 cm. Discuss the criterion one would use to determine how the charges are distributed on the inner and outer surface of the shells. What is t
A disk of 1.6 g is made of zinc. The atomic number of zinc is 30 and the atomic mass is 65.39 g/mole. What is the charge of the electrons in the disk?
The resulting pattern is viewed on a distant curved screen that can show all bright fringes up to and including ±90.0° from the central spot. What is the TOTAL number of bright fringes th
A coin is placed 18.0 from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 30 is reac
Three charges on a linear plane A, B, and C a has a charge of 6 micro C, B has a charge of 1.5microC and C has a charge of -2microC. A andB are 3 cm apart and B and C are 2 cm apart. Calculate the m
A 140 pF capacitor and a 560 pF capacitor are both charged to 2 kV. They are then disconnected from the voltage source and are connected together, positive plate to positive plate and negative plat
You find that the two bright fringes are 5.5apart on a screen 1.6 from the slits. What is the wavelength the laser emits?
An entertainer juggles balls while doing other activities. In one act, she throws a ball vertically upward, and while it is in the air, she runs to and from a table 5.20 away at a constant speed of
A 1.54 wide, 1.34 high, 1400 car hits a very slick patch of ice while going 20.0 . Air resistance is not negligible. If friction is neglected, how long will it take until the car's speed drops to 17
The skis have a thrust of 270 N and a coefficient of kinetic friction on snow of 0.13. Unfortunately, the skis run out of fuel after only 15 s. What is Sams tops speed? How far has Sam traveled when
Four point charges of magnitude 4.7 µC are at the corners of a square of side 3 m. (a) Find the electrostatic potential energy if all the charges are negative. (b) Find the electrostatic poten
A 190 pF capacitor and a 760 pF capacitor are both charged to 2.4 kV. They are then disconnected from the voltage source and are connected together, positive plate to positive plate and negative pla
What is the magnitude and direction of the velocity of the center of mass when the center of mass reaches this height?
An electric dipole has charges of 4.55pC that are separated by 6.75cm . The dipole lies on the x-axis, its positive end lies on the +x-axis, and its center is at the origin. Located at y = +4.00cm i
An insulated Thermos contains 151 cm3 of hot coffee at 75 °C. You put a 12.0 g ice cube at its melting point to cool the coffee. By how many degrees has your coffee cooled once the ice has melte
The Young's modulus for a prosthetic material is 20 GPa. A 2 cm long sample of this material is circular in cross section with a radius of 1 cm. This sample is stretched to 2.002 cm. What tensile fo