What current in a solenoid 15.0-cm long wound with 100 turns would produce a magnetic field equal to that of the Earth, 5.00 × 10?5 T?
What will be an ideal response?
59.7 mA
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A fish is 80 cm below the surface of a pond. What is the apparent depth (in cm) when viewed from a position almost directly above the fish? (For water, n = 1.33.)
A. 50 B. 60 C. 40 D. 70 E. 110
What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state n = 8 jumps to the final state n = 2? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 205 nm B) 104 nm C) 389 nm D) 486 nm E) 610 nm
The speed of a comet in its orbit around the Sun is ______________ when its distance from the Sun is least (perihelion)
a. zero b. reversed c. greatest d. least
Computer monitors are often referred to as CRT's. CRT stands for
A) computer registration tube. B) color relay transmission. C) computer resource transmission. D) nothing; it's computer jargon. E) cathode ray tube.