The John Hancock Center in Chicago is the tallest in the United state's in which there are residential apartments. The Hancock c
1 answer:
The final velocity of the ice is 82.0 m/s
Explanation:
The chuck of ice in this problem is in free fall, so we can use the following suvat equation for uniformly accelerated motion:
where
v is the final velocity
u is the initial velocity
a is the acceleration
s is the displacement
In this problem, we have:
u = 0 is the initial velocity of the chuck of ice
is the acceleration of gravity (we choose downward as positive direction)
s = 343 m is the vertical displacement (the height of the tower)
Solving for v, we find the final velocity of the object:
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Answer:
81.2 A
Explanation:
The magnetic field at the center of a current-carrying loop is given by
where
is the vacuum permeability
I is the current in the loop
R is the radius of the loop
In this problem, we have:
d = 12 cm is the diameter of the loop, so its radius is
R = d/2 = 12/2 = 6 cm = 0.06 m
is the magnetic field at the center
Therefore, the current in the loop must be: