Consider the two parallel wires carrying currents in opposite directions in Figure OQ30.9. Due to the magnetic interaction between the wires, the lower wire experiences a magnetic force that is:
2
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Exclusion Principle: In a hydrogen atom, a given electron has n = 7. How many possible values can ? have?
A. 6 B. 7 C. 15 D. 98
A jack system will increase the potential energy of a heavy load by 1000 J with a work input of 2000 J. The efficiency of the jack system is
A) 10%. B) 20%. C) 50%. D) 80%. E) need more information
The ____________ are places in the orbital plane of a binary star system where a bit of matter can reach stability. The one located directly between the two stars is the point where the Roche lobes meet
a. turnoff points b. horizontal branch c. Lagrangian points d. synchrotron points e. radiation belts
An object 4.0 cm in height is placed 8.0 cm in front of a concave mirror with a focal length of 10.0 cm. What is the position of its image in relation to the mirror and what are its characteristics?
A) 40.0 cm on the other side of mirror, real, 6.0 times bigger B) 10.0 cm on the other side of mirror, virtual, 10.0 times bigger C) 18.0 cm on the same side of mirror, virtual, 2.25 times bigger D) 10.0 cm on the same side of mirror, real, 6.0 times bigger E) 40.0 cm on the other side of mirror, virtual, 5.0 times bigger