Identify a true statement about Sagittarius A*
A) It is a powerful source of gamma rays.
B) It is the largest constellation in our sky.
C) It is the smallest constellation in our sky.
D) It is a supermassive black hole.
D
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Temperature is a measure of heat
a. True b. False Indicate whether the statement is true or false
The phase angle of an RLC series circuit with a capacitive reactance of 40 ?, a resistor of 100 ? and a certain inductor at 1000 Hz is 40.0°. What is the value of the inductance in this circuit?
A) 11.8 mH B) 124 mH C) 212 mH D) 61.9 mH E) 19.7 mH
Two carts (A's mass = 4.5 kg and B's mass = 1.5 kg) are held against a strong, compressed spring. The carts are released simultaneously, and B moves off to the right with a speed of 2.0 m/s. What is A's initial velocity?
At what stage of evolution do T Tauri stars occur?
A) just as the collapsing cloud becomes luminous B) when a protostar is on the verge of becoming a main sequence star C) just prior to the protostar stage D) just after the planetary nebula is expelled E) after the star has established itself as a main sequence star