Gamma rays can penetrate
A)
air only.
B)
a piece of paper.
C)
several millimeters of aluminum.
D)
several centimeters of lead.
E)
several meters of iron.
D
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What is the mass density of argon gas at pressure 1.00 × 105 N/m2 and at temperature 300 K? The mean atomic mass of argon is 39.948 g/mol and the ideal gas constant is R = 8.314 J/mol•K = 0.0821 L ? atm/mol ? K
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A force is required for an object to move
Indicate whether the statement is true or false
When rolled down a mountainside at 7.0 m/s, the horizontal component of its velocity vector was 1.8 m/s. What was the angle of the mountain surface above the horizontal?
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