The most common carbonate rock is
A) dolomite.
B) calcite.
C) halite.
D) limestone.
Answer: D
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Compare two collisions that are perfectly inelastic. In case (A) a car traveling with speed V collides head-on with a sports car having half the mass and traveling in the opposite direction with twice the speed. In case (B) an identical car traveling with the same speed V collides head-on with a light truck having twice the mass and traveling in the opposite direction with half the speed
A uniform rod of length (L = 2.0 m) and mass (M = 1.5 kg) is pivoted about a horizontal frictionless pin through one end. The rod is released from rest at an angle of 30° below the horizontal. What is the angular speed of the rod when it passes through the vertical position? (The rotational inertia of the rod about the pin is 2.0 kg/m2.)
a. 3.5 rad/s b. 2.7 rad/s c. 3.1 rad/s d. 2.3 rad/s e. 1.6 rad/s
A transformer is to be designed to increase the 30 kV (rms) output of a generator to the transmission line voltage of 345 kV (rms). If the primary winding has 60 turns, how many turns must the secondary have?
a. 57 c. 690 b. 6900 d. 11
The vertical displacement of a string is given by y(x,t) = (6.00 mm) cos[(3.25 m-1)x - (7.22 s-1)t]. What is the speed of the wave?
A) 0.450 m/s B) 1.41 m/s C) 2.22 m/s D) 3.16 m/s E) 23.5 m/s