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If we have two different elements, and each has an electron drop from the first excited state to the ground state, they will both have emission lines. But these lines may be very different between the two elements. Explain how this is possible.
although they dont have mass photons-traveling at the speed of light-have momentum. space travel experts have thought
question1a variable reluctance sensor consists of a core a variable air gap and an armature. the core is a steel rod of
An object at rest explodes into three pieces of equal masses. One moves east at 23 m/s, while the second piece moves northwest at 14 m/s. Estimate the velocity of the third piece? Suppose each piece has a mass of 2 kg.
consider children playing on a merry go around that is 6m in diamter turning at 10 revelutions per minute. what will
Two point charges q = 63.0 nC and q = -63.0 nC are in vacuum located on the x axis at -46.0 cm and 46.0 cm, calculate the total electric flux through the y-z plane
How much energy is required to accelerate a spaceship with a rest mass of 128 metric tons to a speed of 0.403 c?
a 0.20-kg particle moves along the x axis under the influence of a conservative force. the potential energy is given
What would be the equilibrium temperature when a 270 g block of copper at 300°C is placed in a 150 g aluminum calorimeter cup containing 820 g of water at 12.0°C.
A bicycle wheel of radius 0.4 m is spinning at a rate of 45 revolutions per minute. What is the period of the wheel's motion? What is the centripetal acceleration of a point on the edge of the wheel?
A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 2.15 rad/s2. Through what angle has the wheel turned when its angular speed reaches 72.0 rad/s
It is desired to slip an aluminum ring over a steel bar. At 10 the inside diameter of the ring is 4.550 and the diameter of the rod is 4.580. Find the temperature at which the ring can be removed
A rectangular block of wood floats in a calm lake. Show that, if friction is ignored, when the block is pushed gently down into the water and then released
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