Electrical kettle:
P = 2 KW = 2000 W
U = 200 V
⇒ I = P/U = 2000 / 200 = 10 A
We apply the Law of Ohm:
R = U / I = 200V / 10A = <u>20 Ω</u>
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Electrical heater:
P = 1 KW = 1000 W
U = 240 V
⇒ I = P/U = 1000 / 240 = 4,16 A
We apply the Law of Ohm:
R = U / I = 240V / 4,16A = <u>57,69 Ω</u>
<u>Answer:</u>
The device with the highest resistance is <u>the electric heater.</u>
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Answer:
15.64 KN
Explanation:
Given
Mass of the elevator = 1.70 × 10³ kg = 1700 kg
acceleration of the elevator = - 0.6 m/s²
Tension in the cable = ?
The free body diagram is given in the attached image
The net force acting on a body accelerates the body in the same direction as that in which the resultant is applied.
Force balance,
ma = T - mg
1700 (-0.6) = T - (1700×9.8)
T = 16660 - 1020 = 15640 N = 15.64 KN
Two north poles would push away from each other
Answer:
The x component of this vector is (-1î) unit
Explanation:
Vector position of point 1 = x₁ = 5 (cos (-π/3)î + sin (-π/3)j) = (2.5î - 4.33j)
Vector position of point 2 = x₂ =3(cos 60°î + sin 60°j) = (1.5î + 2.598j)
Vector joining the two point, x₁₂ = x₂ - x₁ = (1.5î + 2.598j) - (2.5î - 4.33j) = - 1.0 î + 6.928j
The x component of this vector is -1î unit.
