The four general categories of "energy resources" from which we can obtain useful energy services are: fossil, nuclear, renewable [i.e., alternative], and
A) hydroelectric.
B) breeder reactors.
C) biomass.
D) chemical.
E) energy efficiency.
E
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What is Kirchoff’s law?
What will be an ideal response?
A spring scale typically indicates the magnitude of the tension force exerted on its bottom hook. What will the scale read in each of the cases shown in the diagram?
A. 49 N
B. 98 N
C. 196 N
D. Other (specify
The magnetic flux through a loop perpendicular to a uniform magnetic field will change
a. if the loop is replaced by two loops, each of which has half of the area of the original loop. b. if the loop moves at constant velocity while remaining perpendicular to and within the uniform magnetic field. c. if the loop moves at constant velocity in a direction parallel to the axis of the loop while remaining in the uniform magnetic field. d. if the loop is rotated through 180 degrees about an axis through its center and in the plane of the loop. e. in none of the above cases.
A nonrelativistic proton is confined to a length of 2.0 pm on the x-axis. What is the kinetic energy of the proton if its speed is equal to the minimum uncertainty possible in its speed?
(1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s, mproton = 1.67 × 10-27 kg) A) 5.1 eV B) 51 eV C) 510 eV D) 5100 eV E) 51,000 eV