An electric toaster has a power rating of 1100 W at 110 V. What is the resistance of the heating coil?
1 answer:
R = 11 ohms
Explanation:
Given parameters:
Power of the electric toaster = 1100W
Voltage = 110V
Unknown:
Resistance, R of the heating coli = ?
Solution:
Electric power is given as:
Electric power = IV
where:
I is the current
V is the voltage
According to Ohm's law, V = IR
where R is the resistance. If we make current the subject of the formula and substitute, it gives:
Power = }{R}[/tex]
Power = }{R}[/tex]
R = }[/tex] =
}[/tex]
R = 11 ohms
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Explanation:
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m = 4.3 kg, θ = 30 degree, initial velocity, u = 0, s = 2.7 m, t = 5.8 s
By the free body diagram,
Normal reaction, N = mg Cosθ = 4.3 x 9.8 x Cos 30 = 36.49 N
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Net force acting on the block,
Fnet = mg Sinθ - f = 4.3 x 9.8 x Sin 30 - 36.49 μ
Fnet = 21.07 - 36.49μ
Net acceleartion, a = Fnet / m
a = (21.07 - 36.49μ) / 4.3
use second equation of motion
s = ut + 1/2 a t^2
2.7 = 0 + 1/2 x (21.07 - 36.49μ) x 5.8 x 5.8 / 4.3
By solving we get
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Explanation:
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d is the distance covered
In this problem, we know:
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is the force
Solving the equation for d, we find the distance covered by the bird:
Answer:
1160 ohm
Explanation:
We are given that
R'=580 ohm
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