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You have a 54.1 mF capacitor initially charged to a potential difference of 12.5V. You discharge the capacitor through a 4.21 ohm resisitor. What is the time constant
Some GRIN material is made in the form of a doughnut. The inside diameter (the diameter of the hole in the doughnut) is 34 cm, What should be the highest, and the lowest refractive index of the mater
When a guitar string is sounded along with a 439 Hz tuning fork, a beat frequency of 2.00 Hz is heard. What is the frequency of the string
70 grams of water at 85°C are mixed with an equal amount of water at 15°C in a completely insulated container. How much heat is gained by the cold water
An object with a height of 4.0 cm is placed 30.0 cm from a lens. The resulting inverted image has a height of 1.5 cm. What is the focal length of the lens
Two stunt drivers drive directly toward each other. At time t=0 the two cars are a distance D apart, car 1 is at rest, and car 2 is moving to the left with speed v0, At what time do the two cars col
An atom has only two levels, a ground state with energy -25.0 eV, What wavelength photon is required for stimulated emission of an electron in the excited state
A ray of light is incident from the air onto the surface of a diamond (n=2.42) at a 30 degree angle to the normal, calculate the speed of light in the diamond
A 120 kg barrel which is initially at rest is rolled down an inclined plane. The friction between the barrel and the surface of the plane is negligible, calculate the barrel's velocity when it reach
Two small charges with a mass of 1.0 g each are connected by 2.0-cm-long insulating rod of negligible mass. What is the dipole moment of the rod?
Find the critical angle of incidence for a ray of light going from a diamond to air
A 0.245 kg ball is thrown straight up from 1.94 m above the ground. Calculate the total work done by the force of gravity during that time
With brakes fully applied, a 1550 kg car deccelerates from a speed of 78.0 km/hr. What is the change in the kinetic energy of the car
A ray of light passing through air is incident on a piece of quartz (n=1.46) at an angle of 25 degrees. Calculate the deviation d of the ray as it emerges back into the air
A ping-pong ball of mass 4 gm and traveling with a velocity of 4 m/s collides with stationary tennis ball of mass 5 gm. Calculate the magnitude of the velocity of the tennis ball after the collision
A block of mass 2.0 kg is attached to a horizontal spring that has a force constant of 1.70 103 N/m, Find the work done by initially compressing the spring
A hydroelectric power plant is situated at the base of a large dam. Water flows into the intake near the bottom of the reservoir at a depth of 100.2 m, Estimate the maximum possible peak current tha
A 2.10-cm-high insect is 1.50m from a 139-mm-focal-length lens. Where is the image? Follow the sign conventions, How high is the image
A satellite is circling a small planet at a speed of 3.60 rev/day. If the satellite's orbit has a diameter of 30,000 km, how fast is the satellite moving
A ping-pong ball of mass 2 gm and traveling with a velocity of 2 m/s collides with stationary tennis ball of mass 10 gm. Calculate the velocity of the ping-pong ball after the collision
Two capacitors C1 and C2 are connected in parallel to one another, Find the equivalent capacitance of the system if the C1, C2, C3 are respectively 4, 6, 3.6 uF respectively
An isolated hollow spherical conducting shell has a charge of 10^-6 C. In some manner, a point charge of 3*10^-6 C is placed inside the cavity of the shell,find the charge on the inner surface of th
Consider a regular hexagon of side length, L=10cm. A charge, Q=2uc, is located at each vertex(there are 6). find the electostatic potential at the center of the hexagon
A microwave oven is powered by an electron tube called a magnetron that generates electromagnetic waves of frequency 2.25 GHz, Calculate the speed of the microwaves from these data.
A current-carrying wire passes through a region of space that has a uniform magnetic field of 0.76 T. determine the minimum current needed to levitate the wire