What is the value of n in the Balmer series for which the wavelength is 410.2 nm
A) 4
B) 5
C) 6
D) 7
E) 9
C
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What will be an ideal response?
Air at 40ºC passes through an 80 cm by 60 cm rectangular duct 80 m long at 1 m/s. Estimate (a) the outlet temperature of the air if the duct wall temperature is 15ºC and (b) the hydraulic and thermal entrance lengths.
What will be an ideal response?
A ball bearing rolls along a smooth horizontal tabletop, and crashes head-on into a second ball bearing of half its mass. If both ball bearings roll in the x-direction only (either positive or negative) and the initially stationary ball bearing is observed to have a velocity of +2.4 m/s after the collision, what was the velocity of the first ball bearing after the collision?
A. -2.4 m/s B. +2.4 m/s C. -1.2 m/s D. +1.2 m/s E. -0.6 m/s F. +0.6 m/s
In what region of the solar system is Pluto found?
A) the asteroid belt B) the Kuiper belt C) the Oort cloud D) the terrestrial planet region