Hydrogen has an absorption line at a rest wavelength of 656.28 nm. This line is shifted to 656.50 nm in the spectrum of a star. How fast is the star moving? Hint: The Doppler shift formula is = where the speed of light is c ? 300,000 km/
A) about 100 km/s away from us.
B) about 100 km/s toward us.
C) about 1000 km/s away from us.
D) about 1000 km/s toward us.
A) about 100 km/s away from us.
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Define specific heat at constant pressure.
What will be an ideal response?
A machinist turns the power on to a grinding wheel, which is at rest at time t = 0.00 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 25 rad/s
The wheel is run at that angular velocity for 37 s and then power is shut off. The wheel decelerates uniformly at 1.5 rad/s2 until the wheel stops. In this situation, the time interval of angular deceleration (slowing down) is closest to: A) 17 s B) 15 s C) 19 s D) 21 s E) 23 s
A helium-neon laser (? = 632.8 nm) is used to calibrate a diffraction grating. If the first-order maximum occurs at 20.5°, what is the line spacing, d?
a. 1.81 × 10^?6 m b. 1.00 × 10^?5 m c. 1.00 × 10^?4 m d. 1.31 × 10^?6 m e. 6.76 × 10^?7 m
The siphon shown is used to transfer liquid from a higher level to a lower level. If the fluid is drawn up and is continuous through the tube, determine the velocity of flow of gasoline if the vertical distance from the liquid surface to the outlet is 1.0 m.
A. 1.1 m/s B. 2.2 m/s C. 4.4 m/s D. 9.8 m/s E. 6.5 m/s