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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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
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
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
What is the formula of a compound formed from the ions M2+ and X3-?
a. MX b. M3X2 c. M2X3 d. M6X6