Spectral Series: 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


Answer: C

Physics & Space Science

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Potential Energy: The figure shows a group of three particles, all of which have charge Q = 8.8 nC. How much work did it take to assemble this group of charges if they all started out extremely far from each other? (k = 1/4??0 = 9.0 × 109 N ? m2/C2) 

A. 5.5 × 10-5 J B. 6.2 × 10-5 J C. 5.7 × 10-5 J D. 5.9 × 10-5 J

Physics & Space Science

If the Moon rises around 3 A.M., its phase must be

A) full. B) first quarter. C) third quarter. D) waning crescent. E) waxing crescent.

Physics & Space Science

A rifle is aimed horizontally toward the center of a target 0.10 km away, but the bullet strikes 10 cm below the center. Calculate the velocity of the bullet just as it emerges from the rifle.

What will be an ideal response?

Physics & Space Science

If a 500-W heater carries a current of 4.00 A, what is the resistance of the heating element?

a. 85.7 ? b. 42.8 ? c. 31.3 ? d. 11.2 ?

Physics & Space Science