The length 4.221 cm is added to 0.01 cm. The appropriately rounded sum is
A. 4.22 cm.
B. 4.2301 cm.
C. 4.23 cm.
D. 4.2 cm.
E. 4.21 cm.
C. 4.23 cm.
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Olbers's paradox seeks the explanation for why the night sky is dark
Indicate whether the statement is true or false
An object with a mass of 5 kg is dropped and takes 9 s to hit the ground. Then another object with a mass of 10 kg is dropped from the same point. How long does it take to hit the ground?
a. 9 s b. 18 s c. 5 s d. 81 s e. 729 s
When all the colors of the rainbow can be seen in
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An organ pipe open at both ends has two successive harmonics with frequencies of 210 Hz and 240 Hz. What is the length of the pipe? The speed of sound is 344 m/s in air
A) 3.62 m B) 4.90 m C) 5.25 m D) 2.76 m E) 5.73 m