The precession of Earth's axis takes about _____ for one cycle

A) 10,000 years
B) 12,000 years
C) 26,000 years
D) 30,000 years


C

Physics & Space Science

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An organ pipe closed at one end has a length of 60 centimeters. What is the wavelength of the second harmonic?

A. 20 cm B. 60 cm C. 80 cm D. 100 cm

Physics & Space Science

In an electron two-slit experiment, the slits are 15 ?m apart. If the first diffraction maximum lies at an angle of 5.0 × 10-7 rad, what is the momentum of the incoming electrons?

A) 4.4 × 10-23 kg?m/s B) 2.2 × 10-23 kg?m/s C) 11 × 10-23 kg?m/s D) 6.6 × 10-23 kg?m/s E) 8.8 × 10-23 kg?m/s

Physics & Space Science

When two solid spheres of the same material and same radius r are in contact, the magnitude of the gravitational force each exerts on the other is directly proportional to

a. r. b. r2. c. r3. d. r4. e. r6.

Physics & Space Science

The absolute magnitude of a star is the apparent magnitude it would have if it were 10 pc from Earth

Indicate whether the statement is true or false

Physics & Space Science