Answer:
a)
b)
Explanation:
Let´s use Doppler effect, in order to calculate the observed frequency by the byciclist. The Doppler effect equation for a general case is given by:
where:
Now let's consider the next cases:
The data provided by the problem is:
The problem don't give us aditional information about the medium, so let's assume the medium is the air, so the speed of sound in air is:
Now, in the first case the observer alone is in motion towards to the source, hence:
Finally, in the second case the observer alone is in motion away from the source, so:
Answer:
(a). The rms load current is 1.08 A.
(b). The rms primary current is 0.108 A.
Explanation:
Given that,
Primary voltage = 120
Secondary voltage = 12
Load = 10 ohm
We need to calculate the number of turns in primary and secondary coil
Using formula of voltage
Put the value into the formula
We need to calculate the resistance
Using formula of resistance
Put the value into the formula
We need to calculate the current in primary coil
Using formula of current
We need to calculate the current in secondary coil
Using formula of current for secondary coil
Put the value into the formula
Hence, (a). The rms load current is 1.08 A.
(b). The rms primary current is 0.108 A.
serving speed = 170 km/h
now we will convert it into m/s
now it will have two components along x and y directions
also in x and y directions we know
by solving above equation we have
so angle is 6.11 degree below the horizontal
now we have
now time taken by ball to reach the ground will be
now the displacement in x direction will be
now the distance from net will be
So it will land inside the line
1.6 m/s west is the answer
<span>Ans: The source Address field specifies the station that sends the frame.
The format of an Ethernet frame includes a destination address at the beginning which contains the address of the device which is sending the frame. And, the source address tells us which station the information is received from. </span>