An object is dropped and freely falls to the ground with acceleration g. If it is thrown upward at an angle instead, neglecting air drag, the acceleration along its path will be
A) less than g.
B) the same.
C) more than g.
Answer: B
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Resistance and Resistivity: A 25-m wire of diameter 0.30 mm draws 0.499 A when connected across a 3.0-V potential difference.(a) What is the resistance of the wire?(b) What is the resistivity of the material from which the wire is made?
What will be an ideal response?
A 1,800 kg car is traveling at 20.0 m/s NORTHEAST. The momentum of the car is
A. 18,000 kg m/s NORTHEAST. B. 20,000 kg m/s NORTHEAST. C. 28,000 kg m/s NORTHEAST. D. 32,000 kg m/s NORTHEAST. E. 36,000 kg m/s NORTHEAST.
The rotation curve of a galaxy is displayed as a plot of
a) gravity vs. distance to galaxy center b) rotation velocity vs. distance from Earth c) period of rotation vs. distance from Earth d) redshift vs. blueshift e) rotation velocity vs. distance to galaxy center
Series Resonance: What is the resonance frequency of a series ac circuit consisting of a 40.0 ?F capacitor, a 55-? resistor, and a 0.030 H inductor?
A. 0.15 kHz B. 0.9 kHz C. 6.9 kHz D. 6 kHz