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1 cubic Meter, (1.00m^3) of aluminum has a mass of 2.70x10^3 kg, and a 1.00m^3 of iron has a mass of 7.86x10^3 kg. Find the radius of a solid aluminum sphere that will balance a solid iron sphere of
Suppose that you wish to fabricate a uniform wire out of 0.800 g of copper. Assume the wire has a resistance R = 0.300 , and all of the copper is used. (a) What will be the length of the wire?
A person stands at the base of a hill that is a straigt incline making an angle omega with the horizontal. For a given initial speed, at what angle theta(from the horizontal) should objects be throw
(a) At what time is the water mass greatest, and (b) what is that greatest mass? In kilograms per minute, what is the rate of mass change at (c) t = 2.1 s and (d) t = 4.7 s?
The mass of the rod is M and the magnitude of the impulse applied by the blow is J. (Use any variable or symbol stated above as necessary.) (a) Immediately after the rod is struck, what is the veloc
If, instead, the gold is drawn out into a cylindrical fiber of radius 2.400 µm, what is the length (in m) of the fiber?
A 360g block hangs from a spring with k=5.19 N/m. At t=0s, the block is 18.4 cm below the equilibrium position and moving upward with a speed of 140 cm/s. What is the block's speed when the displac
A laser emitting at 632.8nm illuminates a double slit. A screen is positioned 2.00 m from the slits. Interference fringes are observed with a separation of 1.0 cm. Determine the angle of the first-o
(a) Find the tension of this string. Give the answer in pounds. The density of steel is 7.86 g/cm^3. (b) There are 228 strings in a piano. (Some notes use more than one string.) If we assume that th
Two particles are fixed to an x axis: particle 1 of charge q1 = +2.10 x 10-8 C at x = 20 cm and particle 2 of charge q2 = -5.00q1 at x = 70 cm. At what coordinate on the axis is the net electric fiel
A small object A, electrically charged, creates an electric field. At a point P located 0.250 m directly north of A, the field has a value of 40.0 N/C directed to the south. What is the charge of o
An extremely long nonconducting cylinder has a radius R0. The charge density within the cylinder is a function of the distance R from the axes, given by: pE = p0(R/R0)2. What is the electic filed ev
Pat builds a track for his model car out of wood. The track is 19.00 cm wide, 5.00 m long, and 2.78 m high, and is solid. The runway is cut such that it forms a parabola by the equation y = (x - 5)2
Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference in kilometers, (b) its surface area in square kilometers, and (c) its volume in cubic kilometers
If the wires each make a 30 angle with the vertical, what total charge Q must have been applied to the electroscope? Ignore the mass of the wires.
A 1200-kg car and a 2270-kg pickup truck approach a curve on the expressway that has a radius of 274m. At what angle should the highway engineer bank this curve so that vehicles traveling at 63.8mph
Each crate experiences a friction force opposing the motion equal to 50% of its weight. Determine the acceleration of each crate. What is the force exerted by one crate on the other?
The electric field midway between two equal but opposite point charges is 695 N/C , and the distance between the charges is 25.6 cm. What is the magnitude of the charge on each?
A pendulum clock with a brass suspension system is calibrated so that its period is 1 s. at 11C. If the temperature increases to 44C, by how much does the period change?
Imagine assembling four equal charges, one at a time, and putting them at the corners of a square. Find the total work done to assemble these if the charges are each 5 μC and the square has 25 cm
Two point charges, 5 μC and -8 μC are 1.2 m apart. Where should a third charge, equal to 5 μC, be placed to make the electric field at the midpoint between the first two charges equal to ze
Find the electric field at the center of a square produced by four equal 2 μC charges located at its corners. Also for the same situation, find the electric field at the center if two of the neig
Alan leaves Los Angeles at 8:00 AM to drive to San Fransisco, 400 mi away. He travels at a steady 50mph. Beth leaves Los Angeles at 9:00AM and drives a steady 60mph. Who gets to San Fransisco first?
what is the total energy stored in the capacitor? Find this in two ways: directly from the given information and also from the result of part (a)
If we model the Earth-cloud system as a huge capacitor, what are the capacitance of the Earth-cloud system, the charge stored in the "capacitor", and the energy stored in the "capacitor"?