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An astronaut on the planet Zircon tosses a rock horizontally with a speed of 6.55m/s . The rock falls through a vertical distance of 1.10m and lands a horizontal distance of 8.90m from the astronaut
A 100-W, 120-V lightbulb has a resistance of 12 Ohms when cold (20 degrees C) and 140 Ohms when on (hot). Calculate its power consumption at (a) the instant it is turned on, and (b) after a few mom
If this fish is moving upward at 3.00 m/s as its head first breaks the surface and has an upward speed of 7.10 m/s after two-thirds of its length has left the surface, assume constant acceleration a
A rectangular solid made of carbon has sides of lengths 1.0cm, 2.0cm, and 4.0cm, lying along the x,y, and z axes. respectively. Determine the resistance for current that passes through the solid in
A two-slit pattern is viewed on a screen 1.10 m from the slits. If the two third-order maxima are 42.9 cm apart, what is the total width of the central bright fringe?
Draw a free-body diagram of the bird. (Do this on paper. Your instructor may ask you to turn in this work.) How much tension does the bird produce in the wire? Ignore the weight of the wire.
A certain orthodontist uses a wire brace to align a patient's crooked tooth as in the figure below. The tension in the wire is adjusted to have a magnitude of 17.78 N. Find the magnitude of the net
The space between two concentric spherical shell conductors is filled with a material with a resistivity of 10^9 ohm*m. If the inner shell has a radius of 5.0cm, what is the resistance between these
Sound waves with frequency 2700 Hz and speed 343 m/s diffract through the rectangular opening of a speaker cabinet and into a large auditorium of length 100 m.
You make a homemade capacitor out of two flat circular metal plates, each of radius 5 cm, and hold them a distance of 1 cm apart. You then connect each plate to the terminals of a 6-V battery. What
If the area of the plates of a parallel plate capacitor is halved and the separation between the plates tripled, then by what factor does the capacitance change?
T two unpaired electrons per iron atoms. How many kilograms of iron would be spent in the deposit?
Two horizontal forces, F1 and F2, are acting on a box. F2 can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface.
What is the mass of the spaceship and the acceleration due to gravity at the surface of Planet X? Assume that the acceleration due to gravity is constant.
A football punter accelerates a football from rest to a speed of 11 m/s during the time in which his toe is in contact with the ball (about 0.18 s). If the football has a mass of 0.50 kg, what aver
How many times does the ball swing around each minute?
What is the change in temperature of the gas due to the removal of the energy?
A flash unit for a camera has a capacitance of 1155 µF. What resistance is needed in this RC circuit if the flash is to charge to 94% of its full charge in 21.4 s? In kilometer Ohms.
At what distance along the central axis of a uniformly charged plastic disk of radius R = 0.110 m is the magnitude of the electric field equal to 1/5 times the magnitude of the field at the center o
Coefficient of linear expansion for brass .Ignore any effects that might occur due to change in the thickness of the slits. (Hint: Since thermal expansion normally produces very small changes in len
Two concentric metallic shells (conductors) have radii R and 2R, respectively. A charge q is placed on the inner shell, and a charge ?2q is placed on the outer shell. What are the electric fields in
The elastic energy stored in a stretched bungie cord is found to be 568 J. The the bungie cord is stretched 0.349 m, find the elastic force exerted by the bungie cord on the external force. Don't fo
The desired capacitance is 0.300 µF, and the capacitor must withstand a maximum potential difference of 4.00 kV. Find the minimum area of the capacitor plates.
A circular metal plate of radius 0.2m has 10^10 excess electrons uniformly distributed over its surfaces. What is the magnitude AND direction of the field just outside the plate near its center?