In measuring the power of a three-phase electrical motor running a pump, the following data were obtained (based on one-phase current measurement): v (volts) 460 30.2 0.78 459 31.3 0.80 458
I (amps) 30.4 0.79 460 32.0 0.82 461 31.7
PF 0.81 462 30.7 0.77 0.78 459 31.2 0.80

For a three-phase motor, the power (P) is related to the voltage (V), current (1), and power factor (PF) by the formula P:

P= Vx Ix PF √3

Required:
a. Calculate the mean, the standard deviation, and the random uncertainty of each parameter (V, I, PF, and P) at a 95% confidence level.
b. Calculate the mean value of the power and the random uncertainty of the mean power at a 95% confidence level.
c. If all the measured parameters have an accuracy of 1% of the reading of the measuring device, calculate the systematic uncertainty in the power measurement at a 95% confidence level.
d. Calculate the total uncertainty in the power measurement at a 95% confidence level.

answer: f

explanation: g

sleep paralysis is a parasomnia, events associated with sleep.

sleep paralysis happens when you are in the middle of waking up or falling asleep. it is the feeling of being conscious but unable to move. it definitely involves hallucinations.

i had a friend that had sleep paralysis and he told me a story one time where he was laying in bed and he couldn't move his body no matter how hard he tried and there was someone standing in the corner of his room coming towards him. he couldn't move and you can't "wake up" because you are already conscious. sometimes sleep paralysis can be triggered by frequent waking up during the night based off of multiple trips to the bathroom, or if you had ever been abused, sleep paralysis can start happening from things like that.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

answer; equivalent to a one(1) horsepower motor;