Magnetic Field of a Long Wire: A vertical wire carries a current vertically downward. To the east of this wire, the magnetic field points
A. north.
B. east.
C. south.
D. down.
Answer: C
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A heat engine having the maximum possible efficiency has an efficiency of 35.0% when operating between two heat reservoirs. If the temperature of the hot reservoir is 700 K, what is the temperature of the cold reservoir?
A) 200 K B) 245 K C) 350 K D) 455 K E) 600 K
The disk component of our Galaxy has an overall relatively red color
Indicate whether the statement is true or false
A syringe has an inside radius of its barrel of 0.50 cm and at the opening at the end of the needle the radius is 1.0 mm. If a force F is applied to the plunger, what is the force produced at the opening of the needle?
a. 5F b. 25F c. F/5 d. F/25
In the water flow analogy with an electric circuit the pressure in the fluid circuit is analogous to ________ in the electric circuit.
Fill in the blank(s) with the appropriate word(s).