To find the equivalent resistance of the combination of resistors shown below by the method of possibly repeated applications of combining resistors in series and /or combining resistors in parallel, the first step would be which of the following?
a.
Combine the 6.0 ? and the 7.0 ? in series.
b.
Combine either the 4.0 ? and the 10.0 ? in parallel or the 7.0 ? and the 10.0 ? in parallel first, since either could be the first step with the other the second step.
c.
Combine the 4.0 ? and the 10.0 ? in series.
d.
Combine the 6.0 ?, the 4.0 ?, and the 10.0 ? in series in a single step.
c
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Helium fusion is sometimes referred to as the _______________ because three helium nuclei are needed to make a carbon nucleus, and because the helium nucleus is called an alpha particle
Fill in the blank(s) with correct word
Which of the following is a longitudinal wave?
A) sound B) light C) radio D) all of the above E) none of the above
If I0 = 10-12 W/m2 is the threshold of hearing, a sound with intensity I1 = 10-10 W/m2 will give a certain decibel level. Suppose a new sound has an intensity I2 = I12/I0 . What is the new decibel level?
a. 40 c. 10,000 b. 20 d. It will square the decibel level.
Ekapluto is an unknown planet that has two moons in circular orbits. The table summarizes the hypothetical data about the moons. (G = 6.67 × 10-11 N ? m2/kg2)
Mass Radius Orbital radius Orbital period Moon A 4.0 × 1020 kg 2.0 × 108 m 4.0 × 106 s Moon B 1.5 × 1020 kg 2.0 × 105 m 3.0 × 108 m The mass of Ekapluto is closest to A) 1.0 × 1022 kg. B) 3.0 × 1022 kg. C) 1.0 × 1023 kg. D) 3.0 × 1023 kg. E) 1.0 × 1024 kg.