Two resistors of values 6.0 and 14.0 ? are connected in parallel. This combination in turn is hooked in series with a 2.0-? resistor. What is the overall resistance of this combination?
a. 1.4 ?
b. 11 ?
c. 6.2 ?
d. 22 ?
e. 4.2 ?
c
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For a 10 mol mixture of air (8 mols nitrogen, N2, and 2 mols oxygen, O2) at 101 kPa, 20ºC, determine the mass concentration and the molar concentration of N2 and O2.
What will be an ideal response?
A wire (mass = 50 g, length = 40 cm) is suspended horizontally by two vertical wires which conduct a current I = 8.0 A, as shown in the figure. The magnetic field in the region is into the paper and has a magnitude of 60 mT. What is the tension in either wire?
A. 0.15 N B. 0.68 N C. 0.30 N D. 0.34 N E. 0.10 N
Constant Angular Acceleration: A centrifuge in a medical laboratory rotates at a rotational speed of 3600 rev/min. When switched off, it makes 50 complete turns at a constant angular acceleration before coming to rest.(a) What was the magnitude of the angular acceleration of the centrifuge as it slowed down?(d) How long did it take for the centrifuge to come to rest after being turned off?
What will be an ideal response?
The bond energy of a pair of atoms is equal to the depth of the interatomic potential at the ______________interatomic separation.
Fill in the blank(s) with the appropriate word(s).