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Suppose a beam of 5.0 eV protons strikes a potential energy barrier of height 6.0 eV and thickness 0.58 nm, at a rate equivalent to a current of 895 A. (a) How long would you have to wait-on average
Object O stands on the central axis of a concave spherical mirror, at a distance of 40 cm. The distance between the focal point and the mirror is 49 cm. What is the magnification m?
The 22.5-g arrow is shot with a speed of 35.5 m/s and passes through the target, which is stopped by the impact. What is the speed of the arrow after passing through the target?
The needle has a magnetic moment of 0.700 mJ/T. What is the needle's rotational inertia about its (vertical) axis of rotation?
What is the angular momentum of a figure skater spinning at 4.5 rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.6m, a radius of 13cm, and a mass of 52k
If the pressure in this fluid is just barely able to push the fluid into the person, what is the pressure in the person's blood? (The density of the intravenous fluid is approximately that of water.
The four tires on the author's car are inflated to an absolute pressure of 2.8 x 105 Pa. If the car has a mass of 1,650 kg, what is the contact area between each tire and the ground?
A 10.0 ohm resistor, a 12x10^-6 F capacitor, and a 17x10^-3 H inductor are connected in series to a 155-V generator. Current max is at frequency = 352 Hz and max value of rms current = 15.5 A at res
A contact lens is made of plastic with an index of refraction of 1.36. The lens has an outer radius of curvature of +2.04 cm and an inner radius of curvature of +2.60 cm. What is the focal length of
The bullet goes completely through the target, emerging at only vf= 100 m/s on the opposite side. What is the angular speed of the target just after the collision?
Using the Galilean transformation, find its velocity v'(t') measured in the frame of another car moving in the same direction at constant velocity v.
If he pulls his hands in to his chest, so they're essentially on his rotation axis, how fast will he be spinning? Find the work done by the skater puling the weights to his chest?
A hollow ball rolls along a horizontal surface at 3.7 m/s when it encounters an upward incline. If it rolls without slipping up the incline, what maximum height will it reach? What maximum height wi
A radio transmitter of frequency f0 is placed at a distance 7.61 e8 m from the center of Zog. Calculate the fractional change in frequency & Delta f/f0 that would be observed a long distance fro
How far is alpha from their mutual center of mass when alpha and beta are 100km apart?
A converging lens has a focal length of f = 23 cm. An object is placed 44 cm from the lens. Find the size of the image in cm if the object has a height of 4 cm. Express the answer with one decimal p
Calculate the magnitude and direction of the magnetic field in the region through which the current passes.
A rocket explodes into three pieces of equal mass. Immediately after the explosion their velocities are (120 m/s, south), (240 m/s, north) and (120 m/s east). What was the velocity of the rocket's
A metal cube with 40cm side is heated to 400C. it is placed in a room at 25C. Assume it behaves like a black body. Calculate the net power of cube due to radiation.
Both speakers emit sound waves that travel directly from the speaker to point P. a) For what values of x will destructive interference occur at point P?
The loop has a mass 60 grams and resistance 2.3 ohms. The magnetic field oscillates in time according to the equation B=B_0 sin(Omega t ), with B_0= 12 T and Omega= 350 rad/s. What is the maximum cu
Weights are sometimes added to the arms of a boomerang. What effect would this have on the spinning of the boomerang? Where should they be placed for greatest effect? Please indicate the location an
The moment of inertia of a 4.0m long board pivoted at its center is 25kgm2. Find the moment of inertia when it is used as a see-saw with two 50kg kids sitting 1.8mm from the pivot.
Consider a 2210 lb automobile clocked by law enforcement radar at a speed of 85.5 mph. If the position of the car is known within 5.0 feet at the time of the measurement, what is the uncertainity in
What is the uncertainity in the position of an electron moving at 2.00/10^6 m/s with an uncertainity of (traingle v)= 0.01*10^6 m/s?