When a mass of 0.350 kg is attached to a vertical spring and lowered slowly, the spring stretches a distance d. The mass is now displaced from its equilibrium position and undergoes 100 oscillations in 48.9 s. What is the stretch distance d?
A) 2.35 cm
B) 2.97 cm
C) 4.71 cm
D) 5.94 cm
E) 6.28 cm
D
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An automobile manufacturer claims that its product will, starting from rest, travel 0.40 km in 9.0 s. What is the magnitude of the constant acceleration required to do this?
A. 9.9 m/s2 B. 8.9 m/s2 C. 6.6 m/s2 D. 5.6 m/s2 E. 4.6 m/s2
What should be the approximate diameter (in fm) of a nucleus containing 92 protons and 143 neutrons?
What will be an ideal response?
Which of the following is a reason to build an observatory in space?
A. to avoid atmospheric blurring B. They are much less expensive than ground-based observatories. C. They can last forever. D. There is no good reason to build a space-based observatory.
Which of the following could be a stable planetary orbit in a binary system?
A) a large orbit around both stars in a wide binary system B) an orbit close to one of the stars in a wide binary system C) a "figure-of-eight" orbit about both stars in a close binary system D) an orbit close to one of the stars in a close binary system