6. A snowball that will be used to build a snowman is at the top of the only hill in town and weighs 22
1 answer:
Answer:
23.64 m
Explanation:
Potential energy is given by
PE=mgh
Where m us the mass of snowball, g is acceleration due to gravity, h is height.
Also, the weight of an object is given by W=mg hence replacing mg in the above equation with W we obtain
PE=Wh
Making h the subject of the formula then
Substituting 520 J for PE and 22 N for W then
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Answer:
B. The object's volume
Explanation:
When an object is immersed in a fluid, it experiences an upward force which is called buoyant force. The magnitude of the buoyant force is given by:
where
is the density of the fluid in which the object is immersed
is the volume of the fluid displaced by the object
is the acceleration due to gravity
When the object is totally immersed in the fluid, corresponds to the volume of the object; when the object is only partially immersed,
corresponds only to the volume of the part of the object immersed.
From the formula, we see that the greatest buoyant force is experienced by the object when it is fully immersed. Moreover, we see that the buoyant force depends only on one property of the object: its volume. Therefore, the correct choice is
B. The object's volume