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A 0.43-kg piece of wood floats in water but is found to sink in alcohol (SG = 0.79), in which it has an apparent mass of 0.047 kg . Part A What is
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PLZZ help 1a. 1b. 1c.

Screen Shot 2020-06-25 at 8.53.56 PM.png
A 0.43-kg piece of wood floats in water but is found to sink in
alcohol (SG = 0.79), in which it has an apparent mass of
0.047 kg .
Part A
What is the SG of the wood?
Express your answer using two significant figures.
VO
AED
?
SG =
Submit
Request Answer
Screen Shot 2020-06-25 at 8.54.55 PM.png
A 14 cm radius air duct is used to replenish the air of a room
7.2m x 5.4m x 3.5m every 18 min .
Part A
How fast does air flow in the duct?
Express your answer to two significant figures and include the appropriate units.
?
U =
Value
Units
Screen Shot 2020-06-25 at 8.55.48 PM.png
A bat at rest sends out ultraSOnic sound waves at 50.5 kHz and
receives them returned from an object moving directly away from it at 28.5 m/s. 7 Farm What is the received sound frequency? f= Value H Units

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Subject: Physics, Science

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