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A brass cylindrical bar at 300 K has a diameter of exactly 20 mm. An aluminum ring has an inner diameter which is exactly 15 too small to fit over the brass cylinder. To what temperature do you need to heat both the brass cylinder and the aluminum ring so that the ring fits over the cylinder?
The aorta is a major artery, rising upward from the left ventricle of the heart and curving down to carry blood to the abdomen and lower half of the body. what is the magnitude (in m/s2) of the blood's centripetal acceleration
A 1100 kg car increases it speed from 40 km/hr to 60 km/hr in 5 seconds. What is the resultant work done on the car
An electron in chromium moves from the n = 2 state to the n = 1 state without emitting a photon. Use the Bohr theory to estimate the kinetic energy of the Auger electron
A plate carries a charge of -3.9 µC, while a rod carries a charge of 2.9 µC. How many electrons must be transferred from the plate
A 0.150kg glider is moving to the right on a frictionless, horizontal air track with a speed of 0.710m/s, Find the magnitude of the final velocity of the 0.150 kg glider
A student places an object on the 5.0 cm mark of the meter stick. He places a positive lens that he knows has a focal length of 15.0 cm at the 30.0 cm mark on the meter stick. From the data what is the focal length of the negative lens
A negative charge -0.550 µC exerts an upward 0.700 N force on an unknown charge 0.280 m directly below it. What is the unknown charge (magnitude and sign)? What are the magnitude and direction of the force that the unknown charge exerts on the -0.550..
An electron moving horizontally at 3.15 x 106 m/s enters a vertical magnetic field, Find the magnitude of the magnetic field in tesla (T)
A crate of mass 45.0 kg is being transported on the flatbed of a pickup truck. The coefficient of static friction between the crate, What is the acceleration of the crate relative to the ground
A 0.140 kg baseball is thrown with a velocity of 40 m/s. It is struck with an average force of 5000.0 N, How long were the bat and ball in contact
The density of free electrons in gold is 5.90 x 10^28 m-3. The resistivity of gold is 2.44 x 10-8 at a temperature of and the temperature coefficient of resistivity is 0.004 ()-1. A gold wire, 1.30mm in diameter and 27cm long, carries a current of..
What is an average magnitude of the Pointing vector 5.0miles from a radio transmitter broadcasting isotropically with an average power of 250-kW?
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