Showing 271 to 280 of 586 Questions

Does time dilation mean that time actually passes more slowly in moving reference frames or that it only seems to pass more slowly?
0131 
Energy of Fusion In a hypothetical nuclear fusion reactor, two deuterium nuclei combine or ''fuse'' to form one helium nucleus. The mass of a deuterium nucleus, expressed in atomic mass units (u), is 20136 u; the mass of a helium nucleus is 4.00l5u (1 u = 1.6605402 x 1027 kg). (a) How much energy is released when 1.0 kg of deuterium unde
0155 
Energy reaches the upper atmosphere of the Earth from the Sun at the rate of 1.79 x 1017 W. If all of this energy were absorbed by the Earth and not reemitted, how much would the mass of the Earth increase in 1.00 yr?
0137 
Equation 37.23 gives the transformation for only the xcomponent of an object's velocity. Suppose the object considered in the derivation also moved in the y/y'direction. Find an expression for u, in terms of the components of u', v, and c, which represents the transformation for the ycomponent of the velocity.
0146 
Escape velocity from the earth is 40,000 km/h. what would be the percent decreases in length of a 95.2mlong spacecraft traveling at that speed?
2797 
Estimate the average binding energy per nucleon for each of the following nuclei from Figure. 23.11.1. 4822Ti2.14158Ba
049 
Everyday Time Dilation two atomic clocks are carefully synchronized. One remains in New York, and the other is loaded on an airliner that travels at an average speed of 250m/s and then returns to New York. When the plane returns, the elapsed time on the clock that stayed behind is 4.00 h. By how much will the readings of the two clocks di
2269 
Explain how the length contraction and time dilation formulas might be used to indicate that c is the limiting speed in the universe.
0128 
Explain the difference between the ground state and the excited states of electrons in atoms.
051 
Explain why it is necessary, when defining the length of a rod, to specify that the positions of the ends of the rod are to be measured simultaneously.
0142