A 2.0-?F capacitor and a 4.0-?F capacitor are connected in series across an 8.0-V potential source. What is the charge on the 2.0-?F capacitor?
A) 2.0 ?C B) 11 ?C C) 4.0 ?C D) 25 ?C E) 12 ?C
B
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Photography Optics: A 35-mm digital camera using a standard 50.0 mm lens is focused on a 1.80 m tall person who is standing 3.25 m from the lens. You now refocus the camera on a 15.0 cm tall flower that is 75.0 cm from the lens.(a) In refocusing, by how much did you move the lens? Did you move it toward the film or away from it?(b) What is the height of the flower's image on the CCD sensor?
What will be an ideal response?
A beam of photons of wavelength 0.55 nm undergoes Compton scattering from free electrons.What is the energy of the photons that emerge at a 35° angle with respect to the incident beam?
a. 2.3 keV b. 10.9 keV c. 36.0 keV d. 3.0 keV
If the half-life of some radioactive element is 1 billion years, and a mass of rock originally contained 100 g of that element, how many grams of the radioactive element would be left after three billion years had passed?
A) 6.25 g B) 12.5 g C) 25 g D) 50 g E) none
A horizontal section of an artery narrows from a diameter of 8.0 mm to a diameter of 6.0 mm. What is the pressure difference between the wider section and the narrower? That is, what is 
The blood flows in the wider section at 48 cm/s. Take blood plasma to have a density of 1025 kg/m3 and ignore viscosity.
A. 370 Pa B. 750 Pa C. 780 Pa D. 210 Pa