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A very long uniform line of charge has charge per unit length 4.74*10^-6 C/m and lies along the x-axis. A second long uniform line of charge has charge per unit length -2.56*10^-6 C/m and is paralle
An exercise machine indicates that you have worked off 2.5 Calories in a minute-and-a-half of running in place. What was your power output during the time? Give your answer in both watts and horsepo
A loundspeaker diaphragm is producing a sound for 2.1 s by moving back and forth in a simple harmonic motion. The angular frequency of the motion is 8.44 104 rad/s. How many times does the diaphragm
What is the potential difference between the two conductors? Assume that the region between the conductors is air.
A diver springs upward with an initial speed of 1.9 m/s from a 2.5 m board. (a) Find the velocity with which he strikes the water.
(a) At what spot along a line through the charges is the net electric field zero? Give the distance of the spot to the positive charge in meters (m). (Hint: The spot does not necessarily lie between
We were given the answer as 6.3 x 10^8 cm^-3, but I have no idea where to begin on this as we weren't given a temperature so I can't calculate the intrinsic concentration.
If the distance from point A to point B is 0.50 m, what is the change in the proton's electric potential energy, EPEB - EPEA?
A skier leaves the ramp of a ski jump with a velocity of V=10 m/s at an angle of 15 (Degrees) above the horizontal. The slope where she will land is inclined downward at 50 (Degrees), and air resis
A charge (uniform linear density = ?) lies on a string that is stretched along an x axis from x = 0 to x = L. Determine the magnitude of the electric field at a point x = d > L on the x axis. Exp
A 25 L container holds hydrogen gas at a guage pressure of .25 atm and a temperature of 0 C. What mass of hydrogen is in the container and how many molecules are there?
An object is at distance s from a thin glass lens of focal length f. The lens is surrounded by air. The image is at distance s' from the lens. Draw a graph of s' versus s. Explain physically why the
Find the equivalent capacitance of three capacitors C(1) = 5.0 uF (micro F), C(2) = 10 uF (micro F), and C(3) = 12 uF (micro F), when they're in parallel.
An aluminum rod has a resistance of 1.234 4 at 20.0°C. The rod is cooled down to 20 C. And at that temperature it is stretched to twice its length at 20C. Find the new value of the resistance of
You have 750 g of water at 10.0 C in a large insulated beaker. How much boiling water at 100.0 degrees C must you add to this beaker so that the final temperature of the mixture will be 75 degrees C
A car approaches you at a constant speed while sounding its horn. You hear a frequency of 86.0 Hz. After the car goes by, you hear a frequency of 79.0 Hz. What is the frequency of the sound emittted
An aluminum rod is 37cm long at 35.1 degree celcius and has a mass of 522g. If 20400 J of energy is added to the rod by heat, what is the change in length of the rod?
The height of the cliff is 9.00 m and the speed with which the stones are thrown is 14.00 m/s. Write an algebraic expression for the displacement yup of the upward-moving stone and ydown for the dow
The propeller of an toy airplace is at rest when the controller starts the engine. Two seconds later, the propeller is rotating at 3.13 rad/s. Through how many rotations has the propeller of the toy
The particle is allowed to fall into a small hole into the sphere drilled along a diameter, and is observed to undergo simple harmonic motion about the center of the sphere. Find the frequency of th
Draw on this diagram a line expressing all the events occurring at x'=0. Draw all the world lines for light that pass through t=t'=0. (d) Are the x' and ct' axes perpendicular? Explain.
Find the direction of the displacement that will return Bob to his starting point by the most direct route.
Suppose he hits the ball with a speed of 12 m/s at an angle 60^\circ above the horizontal. A) How much farther did the ball travel on the moon than it would have on earth?
How much higher or lower is the launch point relative to the point where the projectile hits the ground?
We can understand how pressure in water depends on depth by considering a stack of bricks. For a stack of bricks, the pressure below the bottom brick is determined by the weight of the entire stack.