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Doppler shift of a hydrogen spectral line* One of the most prominent spectral lines of hydrogen is the Hα line, a bright red line with a wavelength of 656.1 × 10-9 m.
(a) What is the expected wavelength of the Hα line from a star receding with a speed of 3000 km/s?
(b) The Hα line measured on Earth from opposite ends of the Sun's equator differ in wavelength by 9×10-12 m. Assuming that the effect is caused by rotation of the Sun, find the period of rotation. The diameter of the Sun is 1.4 × 106 km.
A 100-watt motor (60% efficient) is used to raise a 100-kilogram load 5 meters into the air. How long, in units of seconds, will it take the motor to accomplish this task?
Find the magnetic field at a distance r from the center of a long wire that has radius 3.13 mm and carries a uniform current per unit area 208 A/m^2 in the positive z direction.
Construction technique critical review:Students will be required to formulate a 1,500 word report (4 pages completed individually according to provided template) examining a particular advanced construction method, technology or technique.
a heat pump will be used to heat a building during the winter and will then cool the same space during the summer. the
A solid round aluminium rod (made of 6061-T6) has a mean yield strength Sy = 40.0 ksi with standard deviation of 4.0 ksi, the rod is to be subjected to a mean static axial load of P = 25 kip with a standard deviation of 2.5 kip.
Air flows steadily through a one-inlet, one-exit control volume. At the inlet, which has a flow area of 28 cm2, the air is at 600 kPa, 500 K, and has velocity of 30 m/s. At the exit, the pressure is 300 kPa, the temperature is 456.5 K, and the veloci..
a shell and tube heat exchanger consists of a tubecarrying a fluid to be heated or cooled surrounded by another fluid
a thick cylindrical sleeve when shrunk onto a hollow shaft of a different material had its internal diameter extended
A Pitot tube measures the total pressure on an airplane flying at sea level as 1.07 x 10^5 N/m^2. What is the velocity of the airplane?
an equiangular strain gage rosette is mounted on a free and unloaded surface of a part made of steel. when loaded the
Use Active HDL 6.3 Student Version or Xilinx ISE Student to design a clocked synchronous state machine with the state/output table shown. Use D flip-flops. Also use two state variables Q1 and Q2 with the statement A=00, B=01, C=11, and D=10
Saturated steam at 230 degrees F, 20.78 psia and 19.386 ft cubed per pound of mass enters a compressor with an internal energy of 108.26 Btu/lb of mass and is compressed to 80 psia. the mass flow rate is 50 lb mass per hour. Heat loss from the compre..
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