Speed =
150 km = 150 000 m
Speed =
Speed = 20.83 m/s, or 75.0 km/h
A seems wrong because with 20 N the can should go more than .5 m so I would say the awnser is B
Hope I Helped :)
Answer:
The direction of current in the second wire will be upward.
Explanation:
We first need to find the direction of the magnetic field due to the first wire using the right-hand thumb rule.
Knowing that, one can easily find the direction of the second wire by using the right-hand rule.
The force per unit length on wire 2 due to wire 1 is given by,
Therefore,
<em>Image attached for better understanding of the problem.</em>
<em>(Source: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/wirfor.html)</em>
Use Newton's second law F = mass * acceleration
In your problem F = 500, and we know gravity is working on it so use a = 9.81
Substitute into the equation
500 = m * 9.81
m = 50.97 kg
Since the formula is mass/volume the density is 3.4915......g/cm^3