A fluid has a density of 1 040 kg/m3 . If it rises to a height of 1.60 cm in a 1.50-mm diameter capillary tube, what is the surface tension of the liquid? Assume a contact angle of zero
a. 0.0612 N/m
b. 0.122 N/m
c. 6.12 N/m
d. 0.245 N/m
e. 12.2 N/m
a
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Observations of young stars (as well as theory) tell us that when the Sun was young the solar wind
A) was weaker than it is today. B) was stronger than it is today. C) was about the same strength as it is today. D) was nonexistent. E) blew outward only along the Sun's poles.
Raul is attending a workshop, but he is having difficulty hearing the speaker because the people behind him are talking. What type of barrier to effective listening is Raul experiencing?
a. Psychological barrier b. Nonverbal distraction c. Grandstanding d. Physical barrier
Which of these is a fictitious force?
a. inertial force b. gravitational force c. electric force d. magnetic force e. centripetal force
Motional Emf: A conducting rod whose length is ? = 25 cm is placed on a U-shaped metal wire that is connected to a lightbulb having a resistance of 8.0 ? as shown in the figure. The wire and the rod are in the plane of the page. A constant uniform magnetic field of strength 0.40 T is applied perpendicular to and out of the paper. An external applied force moves the rod to the left with a constant speed of 12 m/s. What are the magnitude and direction of the induced current in the circuit?
A. 150 mA clockwise B. 150 mA counterclockwise C. 34 mA counterclockwise D. 34 mA clockwise E. 100 mA clockwise