An ornament of mass 40.0 g is attached to a vertical ideal spring with a force constant (spring constant) of 20.0 N/m. The ornament is then lowered very slowly until the spring stops stretching. How much does the spring stretch?
A) 0.00200 m
B) 0.0196 m
C) 0.0816 m
D) 0.800 m
E) 0.200 m
B
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Lenz's law arises because of the following basic principle:
A. Gauss's law B. the conservation of momentum C. Coulomb’s law D. the conservation of energy E. the conservation of charge
Multiple-Object Accelerating Systems: As shown in the figure, a 10-kg block on a perfectly smooth horizontal table is connected by a horizontal string to a 63-kg block that is hanging over the edge of the table. What is the magnitude of the acceleration of the 10-kg block when the other block is gently released?
A. 8.5 m/s2 B. 8.1 m/s2 C. 7.5 m/s2 D. 9.0 m/s2
With which of the following observations could Tycho have demonstrated that a comet must be a celestial phenomenon? (Note: you may want to review Ch. 2)
A) from the comet causing a full solar eclipse across much of Europe B) measuring changes in its brightness over time C) parallax measurements from observing it from two locations on Earth
The horsepower required to rotate the shaft of Problem 2, if SAE-30 oil at 40°C fills the gap, is nearest:
(A) 0.203 hp (B) 0.191 hp (C) 0.174 hp (D) 0.123 hp