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Positively charged aluminum ion, Al3+, has a mass of 4:50 1026 kg. After being accelerated through a potential dierence of 650 V, the ion enters a magnetic eld of 0.500 T, in a direction perpendicular to the eld. Calculate the radius of the path of the ion in the eld.
The average output power of a cellular phone, which can be treated as a point of E-M waves, is 1.0W when it is "ON". Estimate the intensity of the phone's E-M waves in your brain
A 3.2 kg block of wood sits on a table. A 3g bullet, fired horizontally at a speed of 490 m/s, goes completely through the block, emerging at a speed of 250m/s. What is the speed of the block immediately after the bullet exits.
A parallel-plate capacitor with plates of area 580 cm2 and is connected across the terminals of a battery. What is the magnitude of the charge on each plate
If 5.0 moles of air is at 0.0 degrees Celsius and 1.0 atm pressure, what is the volume occupied by the gas in m^3
The space shuttle is in a 300km -high circular orbit. It needs to reach a 610km -high circular orbit to catch the Hubble Space Telescope for repairs, How much energy is required to boost it to the new orbit
The flux in a transformer changes at a rate of 0.4 Wb/s. The primary coil has 40 turns and the secondary coil has 500 turns
What is the value of the static friction.
A stretched cord has a fundamental frequency of 144 Hz, a length of .9 m, and a mass of 2 g. What is the tension on the cord
Three resistors, 28, 46, and 78 %u03A9, are connected in series, and a 0.47-A current passes through them. find the potential difference across the three resistors
Threshold freq. of metal isf0. When the light of freq. 2f0 is incident on the metal max velocity of electrons is v1 and v2
In the Bohr-model hydrogen atom the single electron orbits the nucleus in a circle of radius a= 5.3*10 (-11) making f= 6.6*10( 15) revolutions each second
A steel-belted radial automobile tire is inflated to a gauge pressure of 30.0lb/in^2, what is the tire's pressure at the elevated temperature
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