Identical particles are placed at the 50-cm and 80-cm marks on a meter stick of negligible mass. This rigid body is then mounted so as to rotate freely about a pivot at the 0-cm mark on the meter stick. If this body is released from rest in a horizontal position, what is the angular speed of the meter stick as it swings through its lowest position?
a. 4.2 rad/s
b. 5.4 rad/s
c. 4.6 rad/s
d. 5.0 rad/s
e. 1.7 rad/s
b
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Two infinite, uniformly charged, flat surfaces are mutually perpendicular. One of the sheets has a charge density of +60 pC/m2, and the other carries a charge density of ?80 pC/m2 . What is the magnitude of the electric field at any point not on either surface?
a. 1.1 N/C b. 5.6 N/C c. 7.9 N/C d. 3.8 N/C e. 4.0 N/C
Carbonaceous chondrites are meteorites that have
a. never been melted since formation from solid particles in the solar nebula. b. totally melted after formation. c. been made from hydrogen and helium. d. never entered Earth's atmosphere. e. entered Earth's atmosphere but will be destroyed before reaching the ground.
Multiple-Object Accelerating Systems: A 5.0-kg block and a 4.0-kg block are connected by a 0.6 kg rod, as shown in the figure. The links between the blocks and the rod are denoted by A and B. A vertical upward force of magnitude F is applied to the upper block. The blocks and rod assembly are moving downward at constant velocity of 85 cm/s.(a) What is the magnitude of the applied force F?(b) What magnitude force does link A exert?
Fill in the blank(s) with the appropriate word(s).
The specific heat at constant volume per mole of 3R/2 is for what type of molecule?
a. monatomic b. diatomic c. polyatomic d. any type