An object is placed 15 cm in front of a diverging lens whose focal length is 12 cm. Where will the image be located (in cm)?
a. ?6.7
b. ?7.2
c. ?0.15
d. ?60
e. ?5.0
a
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An ideal reversible heat pump is taking heat from the outside air at -10.0°C and discharging it into the house at 18.0°C. What is the coefficient of performance of this heat pump?
A) 10.4 B) 9.44 C) 0.644 D) 0.533 E) 0.0962
What is the formula of a compound formed from the ions M2+ and X3-?
a. MX b. M3X2 c. M2X3 d. M6X6
An expandable container holds 2.30 mole of helium, He, gas with an initial pressure of 770 kPa and an initial volume of 2.10 L. The gas expands isothermally to a final pressure of 350 kPa
How much heat is gained by the gas during this process? (R = 8.31 J/mol ? K) A) 1280 J B) 792 J C) 685 J D) 1370 J E) 1700 J
If VA?VB = 50 V, how much energy is stored in the 54-?F capacitor?
A. 50 mJ B. 13 mJ C. 28 mJ D. 8.9 mJ E. 17 mJ