Engineering, 25.02.2020 02:54 kittycat92
Suppose you want to find the difference of two sinusoidal currents, given as follows: i1(t)=I1 cos(ωt+ϕ1) and i2(t)=I2 cos(ωt+ϕ2).i1(t)=I1 cos(ωt+ϕ1) and i2(t)=I2 cos(ωt+ϕ2). If you stay in the time domain, you will have to use trigonometric identities to perform the subtraction. But if you transform to the frequency domain, you can simply subtract the phasors I1I1 and I2I2 as complex numbers using your calculator. Make sure that all of your time-domain currents are represented using the cosine function before you apply the phasor transform. Your answer will be a phasor, so you will need to inverse phasor-transform it to get the answer in the time domain. This is an example of a problem that is easier to solve in the frequency domain than in the time domain. Use phasor techniques to find an expression for i(t)i(t) expressed as a single cosine function, where i(t)=[250cos(377t+30∘)−150sin(377t+ 140∘)] mAi(t)=[250cos(377t+30∘)−150sin(3 77t+140∘)] mA. Enter your expression using the cosine function. Round real numbers using two digits after the decimal point.
Answers: 3
Engineering, 04.07.2019 16:10
An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)
Answers: 2
Engineering, 04.07.2019 18:10
The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false
Answers: 2
Engineering, 04.07.2019 18:10
Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.
Answers: 1
Engineering, 04.07.2019 18:10
If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79
Answers: 1
Suppose you want to find the difference of two sinusoidal currents, given as follows: i1(t)=I1 cos(ω...
English, 18.08.2019 18:20
Mathematics, 18.08.2019 18:20
Mathematics, 18.08.2019 18:20
Mathematics, 18.08.2019 18:20
Mathematics, 18.08.2019 18:20
Biology, 18.08.2019 18:20
English, 18.08.2019 18:20
History, 18.08.2019 18:20
Mathematics, 18.08.2019 18:20
Mathematics, 18.08.2019 18:20
Social Studies, 18.08.2019 18:20
Mathematics, 18.08.2019 18:20
Biology, 18.08.2019 18:20