A guitar string 0.650 m long has a tension of 61.0 N and a mass per unit length of 3.00 g/m. (a) What is the speed of waves on the string when it is plucked? (b) What is the string's fundamental frequency of vibration when plucked?
What will be an ideal response?
Answer: (a) 143 m/s (b) 110 Hz
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The number of degrees of freedom of a triatomic molecule is:
A. 1 B. 3 C. 6 D. 8 E. 9
A galvanometer that gives a full-scale deflection when 150 µA runs through it is used to make an ammeter that reads a maximum of 1.00 A. To do this, a 3.3-m? shunt was required. What is the resistance of just the galvanometer?
What will be an ideal response?
A perpetual motion machine of the first kind
A. violates the first law of thermodynamics B. would be a good investment C. violates the second law of thermodynamics D. violates the zeroth law of thermodynamics
The energy per unit volume in an EM wave is
A) equally divided between the electric and magnetic fields. B) almost entirely in the electric field. C) indeterminate. D) almost entirely in the magnetic field. E) zero.