The Sun will leave the main sequence in about ________ years from now.
A. 5 billion
B. 5 million
C. 100 billion
D. 100 million
Answer: A
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Meters: A galvanometer with a coil resistance of 40.0 ? deflects full scale for a current of 2.0 mA. What series resistance should be used with this galvanometer in order to construct a voltmeter that deflects full scale for 50 V?
A. 25 k? B. 27 k? C. 29 k? D. 31 k?
Two objects, one of mass m and the other of mass 2 m, are dropped from the top of a building. If there is no air resistance, when they hit the ground
A. the heavier one will have twice the kinetic energy of the lighter one. B. both will have the same kinetic energy. C. the heavier one will have half the kinetic energy of the lighter one. D. the heavier one will have four times the kinetic energy of the lighter one. E. the heavier one will have one-fourth the kinetic energy of the lighter one.
Which of the following has the highest specific heat?
a. ice b. water c. steam d. They are all water, so they all have the same specific heat.
According to the uncertainty principle, halving the uncertainty in position is accompanied by __________ the minimum uncertainty in momentum.
A. halving B. quartering C. doubling D. quadrupling E. no change in