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Assume the earth to be sphere of a uniform density, (a) what is its rotational energy? Take the radius of the earth to be 6,400km and the mass of the earth to be 6x10^24kg.
The motor in a refrigerator has a power output of 200W. If the freezing compartment is at 270k and the outside air is at 300K, assuming ideal efficiency, what minimum amount of heat that can be ext
Show that the intensity I (the energy crossing unit areaper unit time)is the product of the energy per unit volume u and the speed of propagation v of the wave disturbance.
A glass rod that has been charged to + 17.0nC touches a metal sphere. Afterward, the rod's charge is + 3.0nC . How many charged particles were transferred? Express your answer using two significant
Four identical particles, each having charge q and mass m, are released from rest at the vertices of a square of side L. How fast is each particle moving when their distance from the center of the s
What is the total current through the parallel combination? What is the current through the 41.0 Omega resistor? What is the current through the 93.9 Omega resistor?
Calculate the maximum value of resistance that can be obtained by combining resistors of 35 Omega , 44 Omega , and 68 Omega . Express your answer to three significant figures and include the appropr
X-ray photons of wavelength 0.0248 nm are incident on a target and the Compton-scattered photons are observed at 90 degrees. What is the momentum of the scattered electrons?
A metal surface has a photoelectric cut-off wavelength of 325.6 nm. It is illuminated with light of 259.8nm. What is the stopping potenetial?
Is the net force upward or downward? Is the net force upward or downward?
Draw a free-body diagram for the car. Draw the force vectors with their tails at the front bumper of the car. The location and orientation of your vectors will be graded.
An electric field of 150 volts per meter is uniform and parallel to the horizontal (x) axis in 2-d space. A Gaussian surface of 135 square inches is normal to this field. What is the charge in coulo
A series RC circuit has components R=1.00*10^6 ohms, C=5.00*10^-6 F, and V0=30.0 V. Draw the circuit and solve the following questions: What is the time constant? Find the maximum charge on the capa
A charge of 25 nC is uniformly distributed along a circular arc (radius = 2.0 m) that is subtended by a 90-degree angle. What is the magnitude of the electric field at the center of the circle along
A 9080-kg car is travelling at 26.8 m/s when the driver decides to exit the freeway by going up a ramp. After coasting 404 m along the exit ramp the car\'s speed is 12.6 m/s, and it is h = 10.7 m ab
A 40.0 cm -diameter cylinder of helium gas is 50.0cm long and at 30.0 C. The pressure gauge reads 120 psi. How many helium atoms are in the cylinder? What is the mass of the helium? What is the heli
Two very small objects, whose charges are 1 C and -1 C are separated by 1.5 m. What is the magnitude of the electric force that one charge exerts on the other?
A charge q = 4.11x10-9 C is placed at the origin and a second charge equal to -2q is placed at x=1.00 m. Find the electric potential midway between the two charges.
Suppose the charge is released from rest at the positive plate and that it reaches the negative plate with a speed of 3.4 m/s. What is (a) the mass of the charge and (b) its final kinetic energy?
Find (a) the electric field within the capacitor and (b) the potential difference between the plates .
A 0.145-kg baseball pitched horizontally at 39 m/s strikes a bat and is popped straight up to a height of 41 m. If the contact time between the bat and the ball is 2.35 ms, calculate the average for
Although the magnitudes of the equipotentials and electric fields for electrode configurations (a) and (b) are consistent with interpretation of those arrangements as line charges, the shapes of the
An electric heater is rated at 1750 W, a toaster at 750 W, and an electric grill at 1250 W. The three appliances are connected to a common 120 V household circuit. (a) How much current does each dra
So the voltage equation for a Van de Graaff generator in the region outside the dome, r > R, is the same as that for a point charge with the same total charge.)
calculate the average force [exerted by the bat on the ball] during contact. [Let the positive axis lie along the line from the batter to the pitcher, with the batter at the origin.]