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

Physics & Space Science

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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

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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

Physics & Space Science

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.

Physics & Space Science

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

Physics & Space Science