A nearsighted person has a far point of 18 cm. What power contact lenses will allow this person to comfortably see distant objects clearly?
A) +5.6 diopters
B) -5.6 diopters
C) +0.056 diopters
D) -0.056 diopters
B
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Give examples of four quantities which are scalars
What will be an ideal response?
A parallel plate capacitor of capacitance C0 has plates of area A with separation d between them. When it is connected to a battery of voltage V0, it has charge of magnitude Q0 on its plates. It is then disconnected from the battery and the plates are pulled apart to a separation 2d without discharging them. After the plates are 2d apart, the new capacitance and the potential difference between the plates are what?
A.
C0, 
V0B.
C0, V0C.
C0, 2V0D.
E.
A certain automobile engine takes in 4.00 kJ of energy and performs 1.10 kJ of mechanical work in each cycle. (a) Calculate the engine's efficiency. (b) How much thermal energy is "wasted" in each cycle?
What will be an ideal response?
Celestial longitude is called
a. declination. b. the parsec value. c. the zenith angle. d. right ascension.