Series/Parallel Circuits: If emf of the ideal battery is V = 4.0 V, what is the current through R6 for the circuit shown in the figure?
A. 0.0077 A
B. 0.017 A
C. 0.040 A
D. 4.0 A
Answer: A
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If Earth did not spin, the magnetic field around it would not exist.
Answer the following statement true (T) or false (F)
A baseball outfielder throws a baseball of mass 0.15 kg at a speed of 30 m/s and initial angle of 30°. What is the kinetic energy of the baseball at the highest point of the trajectory? Ignore air friction
a. zero c. 92 J b. 51 J d. 120 J
The saturation magnetization of nickel measured at room temperature is 5.1×105 A/m.
(a) Calculate the average number of Bohr magnetons on a nickel atom, knowing that nickel has an FCC structure with an atom at 0,0,0. At room temperature the lattice parameter is 0.352 nm. (b) Compare your answer to part (a) with the theoretical number of Bohr magnetons based upon the atomic electron structure of nickel, and explain any possible difference.
The position of an object that is oscillating on an ideal spring is given by the equation x = (12.3 cm) cos[(1.26s-1)t]. At time t = 0.815 s,
(a) how fast is the object moving? (b) what is the magnitude of the acceleration of the object? What will be an ideal response?