A thin double convex lens is to focus the image of an object onto a screen so that the image is life-sized. The lens surfaces have equal radii of curvature of 112 cm, and the refractive index of the lens material is 1.500
(a) How far from the lens should the screen be placed?
(b) How far is the screen from the object?
(a) 224 cm (b) 448 cm
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A small bulb is rated at 7.50 W when operated at 125 V. The tungsten filament has a temperature coefficient of resistivity a = 4.50 × 10^-3 / °C. When the filament is hot and glowing, its temperature is seven times room temperature (20 °C). What is the resistance of the filament (in ohms) at room temperature?
a. 234 b. 1 350 c. 2 080 d. 4 530 e. 5 630
Which of the following best describes the purpose of WAI guidelines?
A. To define a web-safe color palette. B. To centralize the domain name registration process. C. To ensure accessibility of webpage content. D. To encourage mobile-first web design strategy.
Planck's quantum theory is compatible with the experimental data related to which of the following?
a. blackbody radiation b. the photoelectric effect c. line spectra emitted by hydrogen gas d. all of the above
Nuclear Binding Energy: When a stationary plutonium-239 nucleus decays into a uranium-235 nucleus plus an alpha particle, the energy released in the process is 5.24 MeV. The following masses are known:
What is the kinetic energy of the 
U nucleus? (1 u = 931.5 MeV/c2)
A. 0.0829 MeV B. 0.0837 MeV C. 0.0852 MeV D. 0.0863 MeV E. 0.0877 MeV