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A mixture of iron and an unknown material is bombarded with electrons. The wavelength of the {\rm{K}}_\alpha lines are 194 \rm pm for iron and 229 \rm pm for the unknown. What is the unknown material (use chemical symbol)?
A 33.2 m steel wire and a 25.6 m copper wire both with 1.00 mm diameters, are connected end to end and are stretched to a tension of 120 N. How long does it take the transverse wave to travel the entire length of the two wires.
As your bus rounds a flat curve at constant speed, a package with mass 0.300 kg , suspended from the luggage compartment of the bus by a string 50.0 cm long, is found to hang at rest relative to the bus, with the string making an angle of 30.0 degree..
When the capacitor is charged to 135V , what is the charge per unit length lambda on the capacitor
A sealed cubical container 24.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 23.0°C. Find the force exerted by the gas on one of the walls of the container.
Eratosthenes measured the circumference of the Earth by noting that the Sun is at an angle of 7°12' = 7.2° ("one-fiftieth of a circle") south of the vertical in Alexandria at the same time of day, What was Eratosthenes percent error
The tackler holds onto the receiver, and the two move off together with a velocity of +1.6 m/s. The mass of the tackler is 115 kg. Assuming that momentum is conserved, find the mass of the receiver.
A 5.00 g bullet is fired into a 500g block of wood suspended as a ballistic pendulum. What was the magnitude of the momentum of the combined mass immediately after the collision
A singly charged positive ion has a mass of 2.53 10-26 kg. After being accelerated through a potential difference of 270 V, the ion enters a magnetic field of 0.590 T, Calculate the radius of the path of the ion in the field
A bottle of wine known as a squinch contains a volume of 1.9 liters. A bottle known as a serroboam contains 8.3 U.S. gallons. How many squinches are there in one serroboam
A 0.873-kg block is held up against a ceiling by a pole that makes an angle of 21 degree with respect to the vertical; What minimum force in the pole is necessary to get the block moving
A Carnot engine extracts 950J from a 600K reservoir during each cycle and rejects 480J to a cooler reservoir. It operates at 22 cycles per second. Find the work done during each cycle
A rocket has an initial mass of 28,000 kg, of which 20 percent is the payload. It burns fuel at a rate of 185 kg/s and exhausts its gas at a relative speed of 1.8 km/s.
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