The determination of the composition of a material by bombarding it with neutrons and monitoring the emitted radiation is neutron activation analysis

a. True
b. False
Indicate whether the statement is true or false


True

Physics & Space Science

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A few collisions and mergers could leave a galaxy with no gas and dust from which to make new stars

Indicate whether the statement is true or false

Physics & Space Science

Thermal radiation is defined as ________

A) radiation that is felt as heat radiation in the form of emission lines from an object B) radiation produced by an extremely hot object C) radiation with a spectrum whose shape depends only on the temperature of the emitting object

Physics & Space Science

Water pressure on a submerged object is greatest against its

A) top. B) bottom. C) sides. D) same against all surfaces E) none of the above

Physics & Space Science

100 grams of molten lead (600°C) is used to make musket balls. If the lead shot is allowed to cool to room temperature (21°C), what is the change in entropy (in J/K) of the lead? (For the specific heat of molten and solid lead use 1.29 J/g?°C; the latent heat of fusion and the melting point of lead are 2.45 × 104 J/kg and 327°C.)

A. ?145 B. ?252 C. ?302 D. ?429 E. ?100

Physics & Space Science