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A block of wood is 8.00cm long, 20.0cm high, and 0.10m wide. its mass is 1.00kg. What is its density in g/cm3?
At the equator, the earth's magnetic field is approximately horizontal and is directed toward the north and has a value of 8 * 10^-5 T. What is the emf if the bullet travels south
Suppose you have a 31.9 m length of copper wire. If the wire is wrapped into a solenoid 0.240 m long and having a radius of 0.0494 m, How strong is the resulting magnetic field in its center when the current is 10.2A
Given a Nanowire with cross sectional dimensions of 10 nm x 10 nm, what momentum would an electron in the ground state need in order to possess the same energy as a stationary electron (zero momentum) in the n=1,2 state?
Infrared spectra are used by chemists to help identify an unknown substance. Atoms in a molecule that are bound together by a particular bond vibrate at a predictable frequency, determine the resonant frequency of this bond and the wavelength of li..
An electric utility company supplies a customer's house from the main power lines (120 V) with two copper wires, each of which is 72.0 m long and has a resistance of 0.103 ohm per 300 m. find the power delivered to the customer
a ship's horn can be heard above typical background noise if at intensity level 20 dB. what must be the power of the horn's output to achive this level at 5.0 km away
What is wave speed
A dipole consists of charges +e and -e separated by 0.67 nm. It is in an electric field E = 2.2 × 104 N/C. What is the value of the dipole moment
A proton of mass m is moving with initial speed v0 directly toward the center of an alpha atom of mass 4m, which is initially at rest. Determine the speed of the alpha atom
a swimmer capable of swimming at a speed of 1.87 ms in still water i.e. the swimmer can swim with a speed of 1.87 ms
A space station is to provide artificial gravity to support long-term stay of astronauts and cosmonauts. It is designed as a large wheel, with all the compartments in the rim, how long should the motor fire
The special effects department wants to know at what rate a space station 200 meters in diameter would have to rotate to create "gravity" equal to 0.7 that at the surface of Earth.
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