Frequency is measured in hertz. Which option best describes hertz? (1 point)
2 answers:
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1.
Explanation:
We have:
voltage in the primary coil
voltage in the secondary coil
The efficiency of the transformer is 100%: this means that the power in the primary coil and in the secondary coil are equal
where I1 and I2 are the currents in the two coils. Re-arranging the equation, we find
which means that the current in the secondary coil is 14% of the value of the current in the primary coil.
2. 5.7 V
We can solve the problem by using the transformer equation:
where:
Np = 400 is the number of turns in the primary coil
Ns = 19 is the number of turns in the secondary coil
Vp = 120 V is the voltage in the primary coil
Vs = ? is the voltage in the secondary coil
Re-arranging the formula and substituting the numbers, we find:
Answer:
Explanation:
To solve this problem we need to apply the concept related to Angular Acceleration. We can find it through the equation
Where for definition,
The number of revolution was given by 20 times, then
We know as well that the salad rotates 6 more times, therefore in angle measurements that is
The cook at the end stop to spin, then using our first equation,
re-arrange to solve ,
We can know find the required time,
Re-arrange to find t, and considering that
Therefore take for the salad spinner to come to rest is 3 seconds with acceleration of