Kepler's second law of planetary motion states that the orbits of the planets are ellipses with the Sun at one focus
a. True
b. False
Indicate whether the statement is true or false
False
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Solenoid: An ideal solenoid 20 cm long is wound with 5000 turns of very thin wire. What strength magnetic field is produced at the center of the solenoid when a current of 10 A flows through it? (?0 = 4? × 10-7 T ? m/A)
A. 0.0063 T B. 0.20 T C. 3.2 T D. 4.8 T E. 0.31 T
The mirror on the passenger side of modern automobiles is a ___________ mirror
a. convex b. concave c. plane d. spherical
The y-coordinate of the centroid of the figure below is located at y = (in.):
(A) 2.2
(B) 3.2
(C) 4.2
(D) 2.8
A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What is the maximum acceleration of the needle?
A) 8.26 cm/s2 B) 16.5 cm/s2 C) 18.1 cm/s2 D) 326 cm/s2 E) 163 cm/s2