Explanation:
Given that,
Area enclosed by a brass bracelet, 
Initial magnetic field, 
The electrical resistance around the circumference of the bracelet is, R = 0.02 ohms
Final magnetic field, 
Time, 
The expression for the induced emf is given by :
= magnetic flux
So, the induced emf in the bracelet is 0.678 volts.
Using ohm's law to find the induced current as :
V = IR
I = 33.9 A
or
I = 34 A
So, the induced current in the bracelet is 34 A. Hence, this is the required solution.
You can use the impulse momentum theorem and just subtract the two momenta.
P1 - P2 = (16-1.2)(11.5e4)=1702000Ns
If you first worked out the force and integrated it over time the result is the same
Answer:
i would say it decreases
Explanation:
bc as distance grows the fields decrease
IM NOT SURE tho
An object with an initial speed of 4.0 m/s accelerates uniformly at 2.0 m/s^2
in
Answer:
15km/h East (15m/s East option)
Explanation:
Velocity = (change in) Distance/(change in) Time
The distance here is 60km, and the time is 4h, as given by the question. Therefore the velocity is 60km/4h = 15km/h.
To convert km/h to m/s, we just divide the value by 3.6, 15/3.6= 4.17m/s (2dp), which isn't actually an option here, so I'm assuming maybe a mistake in unit for the question?
'Velocity' is a vector quantity, meaning it has a size<em> </em>and a direction, as opposed to speed, a scalar quantity, which only has size. Therefore we need to add a direction for it to be velocity. The given direction here is east, so the velocity of the car is 15km/h East. (I would choose the 15m/s East as the question likely has a unit error and is closest.)
Hope this helped!
