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A certain camera has f-numbers that range from 1.7 to 29. If the focal length of the lens is 57 mm, what is the range of aperture diameters for the camera
In an American football game, a 90.6 kg fullback running east with a speed of 5.00 m/s is tackled by a 94.3 kg opponent running north with a speed of 3.03 m/s. Determine the mechanical energy lost a
A small conductive rod of length 1.4 m moves with a constant velocity v=11 m/s in a direction parallel to a long wire carrying a current of 34 A. Calculate the electric potential induced across the
Consider an electron in a square infinite well whose sides have length 0.05 nm. What are the values of the lowest eight eigenvalues
Youâ€TMre writing specifications for a new line of magnifying glasses that have double-convex lenses with equal 22.0cm curvature radii, What do you list for the focal length
A standard deck of cards contains 52 different cards. A poker hand consists of five cards, chose randomly. How many different poker hands are there
Heat and physical activity. In a bench press, a weight lifter lifts 132kg 41cm. In so doing, the athlete expends 1.2kJ. What's the heat flow involved in this process
A balloon contains 1.8mol of helium at 1.0atm initially at 180 degree C. How much work does the gas do in the process
Material found with a mummy in the arid highlands of southern Peru has a _6^14 text(C) activity per gram of carbon that is 74.0% of the activity percent initially
A long solenoid that has 1,190 turns uniformly distributed over a length of 0.420 m produces a magnetic field of magnitude 1.00 multiply.gif 10-4 T at its center
An 81 kg person puts on a life jacket, jumps into the water, and floats. The jacket has a volume of 3.1 x 10-2 m3, What is the density of the life jacket
A skier of mass 64 kg is being towed up a slope ( µ = 15 ±) by a towrope at a constant speed of 3 m/s, what is the force (in N) that the towrope applies to the skier
The rod shown in the drawing is pivoted about an axle passing through its center (solid circle). Is the net torque about the axle due to these forces zero
You heat a 507 cm3 sample of a substance from 131 °C to 265 °C, Calculate the coefficient of volume expansion of this substance
The projection lens in a certain slide projector is a single thin lens. A slide 24.3 mm high is to be projected so that its image fills a screen 1.86 m high. Determine the focal length of the projec
A flat stack of two materials, the first of index of refraction 1.52 and thickness 2 mm, and the second of index of refraction 1.63, What is the size (radius) of the circle of light
Resistors of values 8, 12 and 24 Ohms are connected in parallel across a fresh battery with voltage 12 volts. Which resistor consumes the least power
If the kinetic energy of an electron is 910 eV, calculate its De Broglie wavelength. For this non-relativistic electron you must firs, calculate its velocity from the general kinetic energy equation
an insulated beaker with neligiblr mass contains.280kg of liqid water at a temperature of 84.5degree celicous. what is the final temperature of the ice/ water mixture
The intensity of sunlight at the top of the Earth's atmosphere is about 1360W/m^2. What is the total power emitted by the Sun
In a pan on a stove 125 g of water at 100 degrees Celsius is converted to steam. What s the entropy change of water the is now steam
A positron emission tomography (PET) scanner examines the gamma rays emitted when positrons and electrons annihilate each other. What is the wavelength of the photons
The average value of the squared speed does not equal the square of the average speed. Calculate the average value of the squared speed
The intensity of the light that reaches Earth from the star is 3.94 x 10-21 W/m2. At what rate does the star radiate EM energy
One cubic meter of water flowing over Niagara Falls in New York drops 96.6 meters. how much heat energy would the water have