The process by which electricity can be generated by using running or falling water is known as
a. groundwater generation.
b. hydroelectric generation.
c. geothermal generation.
d. steam generation.
b
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X-ray bursts and gamma ray bursts have the same distribution pattern in the sky
Indicate whether the statement is true or false
Two objects are at rest on a frictionless surface. Object 1 has a mass that is twice that of Object 2. When a constant force is applied to Object 1, it accelerates for a time interval ?t. The force is removed from Object 1 and is then applied to Object 2. After Object 2 has been accelerated for the same time interval, which statements are true?
(i) p2 = 2p1 (ii) p2 = p1 (iii) p2 = ½ p1 (iv) KE2 = 2KE1 (v) KE2 = KE1 (vi) KE2 = ½ KE1
1.(i) and (vi) 2.(ii) and (iv) 3.(i) and (v) 4.(iii) and (v)The metric prefix that means one thousand is milli-
a. True b. False Indicate whether the statement is true or false
A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration of 1.0 rad/sec2 acquires an angular velocity of 5.0 rad/sec. The CD continues rotating at 5.0 rad/sec for 15.0 seconds and then slows to a stop in 12.0 second with a constant angular deceleration. What is the tangential velocity of a point 4.0 cm from the center at the time 2.0 seconds from the start?
A. 0.060 m/s B. 0.080 m/s C. 0.10 m/s D. 0.14 m/s E. 0.18 m/s