Nuclear Reactions: Determine the missing product X in the nuclear reaction 
U + 
n ? X + 2?-.
Fill in the blank(s) with the appropriate word(s).
239 is over 94Pu
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Suppose there is an object for which F = +kx. What will happen if the object is moved away from equilibrium (x = 0) and released?
a. It will return to the equilibrium position. b. It will move further away with constant velocity. c. It will move further away with constant acceleration. d. It will move further away with increasing acceleration.
A uniform solid sphere of mass 1.5 kg and diameter 30.0 cm starts from rest and rolls without slipping down a 35° incline that is 7.0 m long. (a) Calculate the linear speed of the center of the sphere when it reaches the bottom of the incline
(b) Determine the angular speed of the sphere about its center at the bottom of the incline. (c) Through what angle (in radians) does this sphere turn as it rolls down the incline? (d) Does the linear speed in (a) depend on the radius or mass of the sphere? Does the angular speed in (b) depend on the radius or mass of the sphere?
An eclipsing binary will
a. be more luminous than a visual binary. b. also be observed as a spectroscopic binary. c. give off most of its light in the infrared. d. show a constant Doppler shift in its spectral lines. e. show two stars with variable proper motion.
The density of air at room temperature is about 1.2 g/cm3. Estimate the mass of air inside a 0.80-m3 volume refrigerator. (There are 1 million cm3 in 1 m3.)
A) 0.96 g B) 960 kg C) 1000 kg D) more than 1000 kg