Which of the following best describes a property of water?
2 answers:
Answer: C. Remaining liquid over a wide temperature range
Explanation: Water has a high specific heat i.e it requires a large amount of heat to raise the temperature of 1 gram of water through . This is because the molecules of water are associated through strong hydrogen bonds.
It is also an universal solvent as it can dissolve most of the substances in it due to its high dielectric constant.
The freezing point of water is , that is liquid water converts to solid form at
and the boiling point of water is
, that is liquid water converts to gaseous form at
. Thus it can remain in liquid form over the temperature range of
to
Water has a high surface tension as the molecules of water are held together by strong hydrogen bonds.
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The force exerted on the box is 56 N
Explanation:
The work done by a force on an object is given by
where
F is the magnitude of the force
d is the displacement of the object
is the angle between the direction of the force and of the displacement
For the box in this problem, we have:
W = 2240 J is the work done
d = 40 m is the displacement of the box
Assuming that the force is parallel to the displacement,
Solving the equation for F, we find the force exerted on the box:
Learn more about work:
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