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A 0.900-V potential difference is maintained across a 1.50-m length of tungsten wire that has a cross-sectional area of 0.600 mm2. What is the current in the wire?
Find the potential difference between the top of the steel rod and the lower end of the copper wire during the current burst.
An aluminum rod with a square cross section is l.3 m long and 5.2 mm on edge. (a) What is the resistance between its ends?
Question: A tungsten filament used in a flashlight bulb operates at 0.20 A and 3.2 V. If its resistance at 20oC is 1.5?, what is the temperature of the filament when the flashlight is on?
Question: A rod 14.0 cm long is uniformly charged and has a total charge of -22.0 μC. Determine the magnitude and direction of the electric field along the axis of the rod at a point 36.0 cm from
What is the angular separation between the violet edge (400 nm) and the red edge (700 nm) of the first order spectrum produced by the grating?
What is the maximum potential energy this dipole can have due to the sheets, and how should it be oriented relative to the sheets to attain this value?
What are the (a) initial and (b) final values of the quantum number n for the energy level transition that produces this wavelength?
An emf of 10 V is connected to a series RC circuit consisting of a resistor of 2.0 x 106 Ω and a capacitor of 3.0 µF. Find the time required for the charge on the capacitor to reach 9
You are 3.20 m from a plane mirror, holding a camera, and you want to take a photograph of your image in the mirror. To what distance should the camera be focused so you get the sharpest image of
At what coordinate should particle 3 be placed to minimize the magnitude of that force?
A neutron star is composed of neutrons and has a density that is approximately the same as that of a nucleus (about 2.3 x 1017 kg/m3). What is the radius of a neutron star whose mass is 0.93 times t
When an electroscope is charged, its two leaves repel each other and remain at an angle. What balances the electric force of repulsion so that the leaves don't separate further?
The first two dark fringes on either side of the central bright fringe are separated on the screen by a distance of 6.5 mm. What is the width of the slit?
Four identical particles each have charge q and mass m. They are released from rest at the vertices of a square of side L. How fast is each charge moving when their distance from the center of the s
A flying wedge spaceship is a right triangle in side view. At rest, the base and height (which form the 90° angle) measure 7.6 m and 4.3 m, respectively. As the ship moves parallel to its base w
A point charge q1 = + 2.40 µC is held stationary at the origin. A second point charge q2 = -4.30 µC moves from the point x = 0.150 m, Y = 0 to the point x = 0.250 m, Y = 0.250 m. How much
An electron is released from rest at a point midway between the two charges and moves along the line connecting the two charges. What is the speed of the electron when it is 10.0 cm from the + 3.00-
The bullets mass is 5.00 g and its velocity is 300m/s when it leaves the gun's muzzle. If the force pushing it out of the barrel act for 4.00 m/s, what was the average force acting on the bullet?
What is the ratio s1/s2 of the surface charge densities of the spheres?
Consider a head-on elastic collision of two balls. Ball A moving at 45 m/s collides with ball B which is initially at rest. Both ball A and ball B have the same mass. What is the speed of ball A aft
Suppose that 1.00 g of hydrogen is separated into electrons and protons. Suppose also that the protons are placed at the Earth's North Pole and the electrons are placed at the South Pole. What is th
In a rectangular coordinate system a positive point charge q = 6.00 X 10-9 C is placed at the point x = + 0.150 m, y = 0, and an identical point charge is placed at x = -0.150 m, y = 0. Find the x-
Just before entering the rough patch, the speed of the box was 2.25 m/s, and just after leaving it, the speed of the box was 1.20 m/s. What is the average power consumed by friction on the rough p
What is the maximum speed of the mass? How far is the mass from the equilibrium position when its speed is half the maximum speed?