caleb768

28.02.2021 • 

Physics

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The figure shows three forces applied to a trunk that moves leftward by 3.44 m over a frictionless floor. The force magnitudes are
F1 = 4.94 N, F2 -8.81 N, and F3 - 2.72 N, and the indicated angle is 8 - 60° (a) During the displacement, what is the network done on
the trunk by the three applied forces, the gravitational force, and the normal force? (b) Is there a net transfer of energy to or from
the trunk? (c) Does the kinetic energy of the trunk increase or decrease?
(a) Number
Units
(b)
(c)
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Ответ:

lucypackham9

19.08.2022

Physics

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9) Which is an example of microbial contamination?
a) Broken Glass
b) Lead
C) Bacteria
d) Metal Fillings


10) are chemical contaminants.
a) Insect fragments
B) Microbes
c) Pesticides
d) Mold


11) Chemical contaminants enter the food supply through .
a) industrial waste
b) spraying crops in the fields
c) water supplies
D) All of the above.

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