About how long is the solar cycle (evidenced by the polarity of the Sun's magnetic field)?
A. 3 years
B. 22 years
C. 5 days
D. 11 years
Answer: B
Physics & Space Science
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What is buoyancy?
What will be an ideal response?
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A torsional pendulum consists of a solid disk (mass = 2.0 kg, radius = 1.0 m) suspended by a wire attached to a rigid support. The body oscillates about the support wire. If the torsion constant is 16 N?m/rad. What is the angular frequency (in rad/s)?
A. 2 B. 4 C. 6 D. 8 E. 7
Physics & Space Science
The unit called the hertz (Hz) is equivalent to
a. 1/s only. b. a reciprocal second only. c. s-1 only. d. all of these.
Physics & Space Science
After 8.0 years have elapsed, 15/16 of a sample of a specific radionuclide has decayed. What is the half-life of the radionuclide?
Physics & Space Science