Springs: 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
Answer: B
You might also like to view...
A leaf falls from a tree. Compare its kinetic energy K to its potential energy U
A) K increases, and U decreases. B) K decreases, and U increases. C) K decreases, and U decreases. D) K increases, and U increases. E) K and U remain constant.
A monatomic ideal gas expands adiabatically from an initial volume of 72 L and an initial temperature of 350 K until its temperature falls to 290 K. What is the final volume of the gas?
A) 95 L B) 98 L C) 101 L D) 104 L E) 142 L
A certain fuse "blows" if the current in it exceeds 1.0 A, at which instant the fuse melts with a current density of 620 A/cm2. What is the diameter of the wire in the fuse?
A) 0.45 mm B) 0.63 mm C) 0.68 mm D) 0.91 mm
A ruby laser beam (? = 694.3 nm) is sent outwards from a 2.7-m diameter telescope to the moon, 384,000 km away. What is the radius of the big red spot on the moon?
a. 500 m b. 250 m c. 120 m d. 1.0 km e. 2.7 km