A pair of narrow slits, separated by 1.8 mm, is illuminated by a monochromatic light source. Light waves arrive at the two slits in phase,
and a fringe pattern is observed on a screen 4.8 m from the slits. If there are 5.0 complete bright fringes per centimeter on the screen near the center of the pattern, what is the wavelength of the monochromatic light?
A) 550 nm
B) 600 nm
C) 650 nm
D) 700 nm
E) 750 nm
E
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Nuclear Binding Energy: When a stationary plutonium-239, 
Pu, decays into uranium-235 plus an alpha particle, the energy released in the process is 5.24 MeV. The following masses are known:
What is the mass of the 
Pu nucleus, in amu? (1 u = 931.494 MeV/c2)
A. 239.05215 u B. 239.02775 u C. 239.00189 u D. 238.99919 u E. 238.98884 u
Which of the following best describes the image from a plane mirror?
a. virtual and magnification equal to one b. real and magnification equal to one c. real and magnification less than one d. virtual and magnification greater than one
A 500 g lump of clay is dropped onto a 1 kg cart moving at 60 cm/s. The clay is moving at 30 cm/s just before landing on the cart
After the collision, the speed of the cart and clay is closest to:
Is it ever possible for the following process to occur?
? ? (e+) + (e-) + (e+) A) Yes, it is. B) No, this process does not conserve energy. C) No, this process does not conserve momentum. D) No, this process does not conserve mass. E) No, this process does not conserve electric charge.