What star is the most likely to have made the atoms of gold in your jewelry or your electronics?
A) a high-mass star B) a low-mass star C) the Sun D) a white dwarf
A
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A student wants to establish a standing wave on a wire 1.8 m long clamped at both ends. The wave speed is 540 m/s. What is the minimum frequency she should apply to set up standing waves?
A straight wire 20 cm long, carrying a current of 4 A, is in a uniform magnetic field of 0.6 T. What is the force on the wire when it is at an angle of 30° with respect to the field?
A) 0.2 N B) 0.3 N C) 0.4 N D) 0.5 N E) 0.6 N
Which of the following best describes the image for a thin, concave lens that forms whenever the magnitude of the object distance is less than that of the lens's focal length?
a. inverted, diminished, and real c. inverted, enlarged, and real b. upright, diminished, and virtual d. upright, enlarged, and virtual
Explain how we can find the age of a star cluster
What will be an ideal response?