From Pink Line, you use public transit to get to Daley Center. It will take around 16 minutes. The Richard Daley Center is located in between the streets of Randolph and Washington, and <span>Dearborn and Clark. The Bongo Room is a famous landmark near the Daley Center.</span>
Answer:
The velocity of the police car relative to earth is 
Given:
time for flash generation of the inter galactic police car, t = 1.2 s
time between flashes as measured from earth, t' = 2.2 s
Solution:
Utilising Einstein's equation for time dilation to calculate the velocity of the police car, the equation is given by:
(1)
where, c = speed of light in vacuum = 
re arranging eqn (1) for velocity, v:
(2)
Now, from eqn (2)
Answer:
Explanation:
The magnetic force is given by the equation,
Where 
is the angle between velocity vector and the magnetic field,
That angle is 90°.
We know as well that
F=ma, replacing the mass and the acceleration in our previous equation we have
Our values are,
Substituting,
Answer:
Its resistance decreases
Explanation:
The resistance of a wire is directly proportional to the length of the wire and inversely proportional to the cross sectional area of the wire.
Mathematically,
R1 =¶L1/A1... (1)
R1= ¶L1/{Πd²/4}
R1= 4¶L1/Πd²
where;
¶ is the constant of proportionality which is the resistivity of the material
L is the length of the wire
A is the cross sectional area
A1 = Πd²/4
If the length is quadrupled and its diameter tripled
The new length L2 will be 4L1
New area A2 = Π(3d)²/4 = 9Πd²/4
The resistance will become
R2 = ¶(4L1)/{9Πd²/4}
R2 = 4¶L1×4/9Πd²
R2 = 16¶L1/9Πd²... (2)
R2/R1 = 16¶L1/9Πd²÷4¶L1/Πd²
R2/R1 = 16¶L1/9Πd²×Πd²/4¶L1
R2/R1 = 16/9×1/4
R2/R1 = 16/36
R2/R1 = 4/9
R2 = 4/9R1
This shows that the resistance of the wire decreases
