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One kilogram of dry air at STP conditions is exposed to 1.00 R of X-rays. One roentgen is defined by Equation 32.1 in Section 32.1. An equivalent definition can be based on the fact that an exposure of one roentgen deposits 8.30 x 10-3 J of energy per kilogram of dry air. Using the two definitions and assuming that all ions produced are singly charged, determine the average energy (in eV) needed to produce one ion in air.
The pilot of an aircraft wishes to fly due west in a 47.7 km/h wind blowing toward the south. In what direction should the aircraft head
A block of mass m = 2.5 kg rests on a frictionless floor. It is attached to a spring with a relaxed length L = 6 m. By what amount is the spring extended
A coin placed on a turntable rotating at 34.1 rev/min will stay there if its center is placed no further than 10.0 cm from the axis of rotation, What is the coefficient of friction between the coin and turntable
A block of mass m=1.8 kg slides along the inside of a hemispherical bowl of radius r=0.8 m. find the normal force on the block by the bowl
A 2.20-mol sample of helium gas initially at 300 K, and 0.400 atm is compressed isothermally to 1.00 atm. Find the energy transferred by heat
S and P waves, simultaneously radiated from the hypocenter of an earthquake, are received at a seismographic station 17.3 s apart. Assume the waves have traveled over the same path at speeds of 4.50 km/s and 7.80 km/s. Find the distance from the s..
The magnitude of a magnetic field a distance 2.0 um from a wire is 11.0*10^4 T. How much current is flowing through the wire
A person has far points 72.1cm from the right eye and 97cm from the left eye. What are the powers of the corrective lenses
What is the minimum uncertainty in the speed of an electron that is known to be somewhere between 0.065nm and 0.30nm from a proton
A pump is required to lift 750 liters of water per minute from a well 17.0m deep and eject it with a speed of 19.0, How much work per minute does the pump do
An Escort and a Camaro traveling at right angles collide and stick together. What was the speed of the Camaro
A proton traveling at 31.0° with respect to a magnetic field of strength 4.90 mT experiences a magnetic force of 5.7 10-17 N. Calculate the proton's speed
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