Which of the following is that form of energy associated with an object's location in a conservative force field?
a. potential
b. thermal
c. bio-chemical
d. kinetic
a
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Beats: A music tuner uses a 554-Hz C# tuning fork to tune the frequency of a musical instrument. If the tuner hears a beat frequency of 2 Hz, what is the frequency of the instrument?
A. It must be 556 Hz. B. It must be 552 Hz. C. It could be either 556 Hz or 552 Hz. D. It could be either 553 Hz or 555 Hz. E. It is neither 556 Hz or 552 Hz.
An LRC series circuit has voltage supplied to it at a frequency of 13.0 kHz with a phase difference between the current and the voltage of magnitude 0.20 rad
If the circuit has a capacitance of 5.0 ?F and an inductance of 0.050 H find the resistance of the circuit. A) 0.32 k? B) 9.0 k? C) 0.99 k? D) 20 k?
The temperature inside an H II region is colder than inside an H I region
Indicate whether the statement is true or false
A box is moved 10 m across a smooth floor by a force F making a downward angle with the floor, so that there is effectively a 4 N force acting parallel to the floor in the direction of motion and a 3 N force acting perpendicular to the floor. The force F acts for 20 seconds. The impulse delivered to the box by the floor during this process has magnitude
A. 60 Ns. B. zero. C. 100 Ns. D. 80 Ns. E. Can't tell without knowing the weight of the box