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The gas shell of a planetary nebula is expanding (away from the central star) at 20 km/s. The nebula currently has a diameter of 1 light year. What is the age of the planetary nebula(time since the gas was ejected)?
Two closely spaced circular disks form a parallel plate capacitor. Find what are the diameters of the disks
question what are the directions of electric and magnetic field vectors relative to each other and relative to the
Calculate the force a piano tuner applies to stretch a steel piano wire 8.10 mm, if the wire is originally 0.850 mm in diameter and 1.30 m long
q1. a thermos contains 175 cm3 of coffee at 85deg c. to cool the coffee you drop two 13-g ice cubes into the thermos.
You "throw together" 37 protons, 48 neutrons, and 37 electrons, to make a hypothetical atom of mass 84.960840 amu. (Utilize my number; don't look up the atom in a table of isotopes.) What is its binding energy in MeV/nucleon?
A wagon is coasting at a speed vA along a straight and level road. When thirty-four percent of the wagon's mass is thrown off the wagon, parallel to the ground and in the forward direction, the wagon is brought to a halt. If the direction in which th..
An airplane flies eastward and always accelerates at a constant rate. At one position along its path it has a velocity of 26.5 m/s, it then flies a further distance of 40500 m and afterwards its velocity is 46.3 m/s.
A swimming pool has dimensions 32 m 11 m and a flat bottom. When the pool is filled to a depth of 2.10m with fresh water, what is the force caused by the water on the end that is 11m.
Although both stars probably formed from the same clump of gas, more massive one must have had its birth slowed so that it became a key -sequence star millions of years later than its less massive companion.
Water Drips at a constand rate from a faucet that is 50.0cmabove a sink. Just as one drop hits the sink, another drop is falling through the air and a third drop is just leaving the faucet.
Illustrate the cause of the components accelerating from rest down the conveyor.
The Large Hadron Collider, or LHC, to be completed later this year, accelerates protons around a nearly circular track of circumference 26.66 km to a momentum of up to 3.74e-15 kg m/s, For the same magnetic field as in part (a), what is the momentu..
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