Water at 4°C will expand when it is slightly
A) cooled.
B) warmed.
C) both of these
D) none of the above
Answer: C
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An object accelerates when it experiences a non-zero net force. Which of the following statements is always true?
1.The object moves in the direction of the net force. 2.The object's velocity increases. 3.The object's velocity is in the same direction as its acceleration. 4.The object's acceleration is in the same direction as the net force that acts upon it.
In the telescope, ________ shows the most turbulent atmosphere, with changes easily seen even with amateur telescopes
A) Saturn B) Uranus C) Pluto D) Neptune E) Jupiter
If gold were used as nuclear fuel, it would be best
A) fused. B) fissioned. C) either of these
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