An object placed 19.0 cm from a concave mirror produces a real image 12.7 cm from the mirror. If the object is now moved to a new position 27.0 cm from the mirror, where is the new image located as measured from the mirror?
a. 7.61 cm
b. 10.6 cm
c. 5.94 cm
d. 18.0 cm
e. 20.7 cm
b
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A thin copper rod 1.0 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?
A) 1.2 A B) 2.5 A C) 4.9 A D) 7.6 A E) 9.8 A
When a nucleus undergoes alpha decay, the daughter element always has
A. more electrons than the parent. B. less charge than the parent. C. more neutrons than the parent. D. the same atomic number as the parent.
The distance to Canopus is 96 pc. What is the parallax angle as observed from the Sun?
a. 0.01 degrees b. 0.01 arc minutes c. 0.01 arc seconds d. 96 pc
As viewed edge-on, we can see all the spurs and branches off the arms of the Milky Way galaxy
a. True b. False Indicate whether the statement is true or false