Answer:
a average load current = 11.33 A
b rms load current = 8.02A
c true power =962.64 W
d apparent power =962.64 W
e. power factor cosθ =1
Explanation:
Vs (t) = 170 sin(377t) v
Vm =170v
Vrms = 170/√2 =120.23 v
Im = Vm/R = 170/15 = 11.33 A
Irms = Im/ √2 = 11.33/√2 =8.02A
Resistors are electronic components that consume energy
the power in a resistor is given by P =IVcosθ ; in a resistor cosθ =1
P =IV
The electrical power consumed by a resistance, (R) is called the true or real power
and is obtained by multiplying the rms voltage with the rms current.
P= Vrms × Irms
120.03×8.02
P= 962.64 W ; true power
apparent power = Vrms × Irms
=120.03×8.02
= 962.64W ; apparent power
power factor cosθ = true power/ apparent power
cosθ = 962.64/962.64
cosθ = 1
For the purely resistive circuit, the power factor is 1 , because the reactive power is equal to zero (0).
Answer:
For the complete question provided in explanation, if the elevator moves upward, then the apparent weight will be 1035 N. While for downward motion the apparent weight will be 435 N.
Explanation:
The question is incomplete. The complete question contains a velocity graph provided in the attachment. This is the velocity graph for an elevator having a passenger of 75 kg.
From the slope of graph it is clear that acceleration at t = 1 sec is given as:
Acceleration = a = (4-0)m/s / (1-0)s = 4 m/s^2
Now, there are two cases:
1- Elevator moving up
2- Elevator moving down
For upward motion:
Apparent Weight = m(g + a)
Apparent Weight = (75 kg)(9.8 + 4)m/s^2
<u>Apparent Weight = 1035 N</u>
For downward motion:
Apparent Weight = m(g - a)
Apparent Weight = (75 kg)(9.8 - 4)m/s^2
<u>Apparent Weight = 435 N</u>
Answer:
Because some of the energy is dissipated in the metabolic activities such as digestion and maintaining the warmth of the body of the organism at each level.
Explanation:
Food chain is the sequential chain of energy transfer from one onrgaanism at a trophic level to another organism at the other trophic level. Autotrophs receive the energy from the sun and prepare their own food. Autotrophs then get consumed by the primary heterotrophs and further primary heterotrophs by the secondary heterotrophs. When the secondary heterotrophs die they are then consumed by the scavangers and decayed by the micro-organisms in to the soil which finally help the autotrophs (plants) in their growth.
At each trophic level of the food chain the energy does not gets completely transferred because the organisms also spend some energy in search of the food and the processing of food is also an energy consuming process.
The energy is also used in combating the climatic conditions and predators for the survival.
A lot of it is all experimental as long as you are taking caution of safety while doing it. I personally would use copper wiring mainly for the fact that it is a nice conductor. For the wrap around the wiring i usually would use black or red electrical tape just because it has very nice insulator properties and is safe to use.
