An object is placed 10 cm in front of a concave mirror with a 20-cm focal length. Determine the image location (in cm)

a. -20
b. -15
c. -10
d. -5
e. 6.7


A

Physics & Space Science

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The specific of ice is 2.10 kJ/kg the heat of fusion for ice at 0is 333.7 kJ/kg, the specific heat of water 4.186 kJ/kg and the heat of vaporization of water at 100is 2256 kJ/kg. What is the final equilibrium temperature when 10.0 grams of ice at -15.0is mixed with 3.00 grams of steam at 100

A. 60.2
B. 65.0
C. 70.2
D. 76.4
E. 80.3

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The angular separation of two stars is 0.1 arcseconds and you photograph them with a telescope that has an angular resolution of 1 arcsecond. What will you see?

A) The photo will seem to show only one star rather than two. B) The two stars will appear to be touching, looking rather like a small dumbbell. C) The stars will not show up at all in your photograph. D) You will see two distinct stars in your photograph.

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A long solenoid (diameter = 5.0 cm) is wound with 960 turns per meter of thin wire through which a current of 300 mA is maintained. A wire carrying 12 A is inserted along the axis of the solenoid. What is the magnitude of the magnetic field at a point 2.0 cm from the axis?

A. 0.41 mT B. 0.48 mT C. 0.38 mT D. 0.56 mT E. 0.24 mT

Physics & Space Science

Light enters a substance from air at an angle of 32.0°, and continues at an angle of 23.0°. What is the index of refraction of the substance?

A) 0.74 B) 1.11 C) 1.28 D) 1.36 E) 1.52

Physics & Space Science