Which sequence of formation by age is correct, oldest to youngest?
A) Dark nebulae, planetary nebulae, emission nebulae
B) Spiral arms, bulge, halo
C) Halo, spiral arms, globular clusters
D) Globular clusters, emission nebulae, open clusters
D
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You are traveling quickly along a freeway. Your car has kinetic energy. You suddenly skid to a stop because of congestion in traffic. Where is the kinetic energy that your car once had?
1.All of it goes into internal energy in the road. 2.All of it goes into internal energy in the tires. 3.Some of it goes into internal energy of the road and some into internal energy of the tires. 4.Some of it goes into internal energy of the road, some to internal energy of the tires, some to other internal energy, and some is transferred away by mechanical waves.
__________ are emitted when high speed electrons decelerate as they are smashed into a metal target
Fill in the blank(s) with correct word
Series Resonance: In a RLC circuit, the values of the inductance and capacitance are both halved. As a result of this change, the resonance frequency of the circuit is
A. the same as before. B. reduced to one-half the original value. C. reduced to one-fourth the original value. D. twice the original value. E. four times the original value.
Nearby stars have larger parallax angles, therefore their distance in parsecs is smaller.
Answer the following statement true (T) or false (F)