Which statement is true about energy changes?
a.
energy can be created and destroyed.<...
Physics, 31.12.2019 07:31, QueenNerdy889
Which statement is true about energy changes?
a.
energy can be created and destroyed.
b.
energy cannot be created or destroyed.
c.
energy can be created but not destroyed.
d.
energy can be destroyed but not created.
Answers: 2
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Alexander calder's mobiles are an example of motion because it uses forces of wind and water.
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How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by
Answers: 2
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Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)
Answers: 2
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An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2
Answers: 1
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