Answer:
A. 27.4 m
B. 0.35 rad or 20 degrees
Explanation:
A Ferris wheel with 80m in diameter would have a radius of 40m
Let the center of the wheel be the origin, so the vector (let call it a) from the the center of the wheel to Betty's starting (lowest) point is
When the wheel rotated by 40 degrees, Betty would have traveled a distance of:
horizontally
vertically
So her displacement vector is <25.71, 9.36>
A. Magnitude of this vector is
B. Direction of this vector is
or 20 degrees
Answer:
a) 2250 J
b) 0 J
c) 2250 J
Explanation:
a) Since, the process is isochoric
the change in internal energy
Here, n = 0.2 moles
Cv = 12.5 J/mole.K
We have to find T_f so we can use gas equation as
So,
b) Since, the process is isochoric no work shall be done.
c) By first law of thermodynamics we have
Since, Q is positive 2250 J of heat will flow into the system.
Answer:
circuit sketched in first attached image.
Second attached image is for calculating the equivalent output resistance
Explanation:
For calculating the output voltage with regarding the first image.
For the calculus of the equivalent output resistance we apply thevenin, the voltage source is short and current sources are open circuit, resulting in the second image.
so.
Taking into account the %5 tolerance, with the minimal bound for Voltage and resistance.
if the -5% is applied to both resistors the Voltage is still 5V because the quotient has 5% / 5% so it cancels. to be more logic it applies the 5% just to one resistor, the resistor in this case we choose 2k but the essential is to show that the resistors usually don't have the same value. applying to the 2k resistor we have:
so.
