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bulgar [2K]
3 years ago
6

A locomotive engine pulls a train with a constant force comment on whether its acceleration will increase or decrease if more co

aches are added to the train
Physics
1 answer:
julia-pushkina [17]3 years ago
7 0

Explanation:

the acceleration will be unchanged according to newton second law of motion

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Cells are made of different kinds of tissues that work together true or false
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) The magnitude of scalar product of two unit vectors perpendicular to each other is ​
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This question involves the concept of the scalar product.

The magnitude of the scalar product will be "0".

<h3>SCALAR PRODUCT</h3>

The scalar product, also known as the dot product of the two vectors is given by the following formula:

A.B = |A||B|Cos\theta

where,

  • A.B = Scalar product = ?
  • |A| = Mangnitude of vector A = 1 unit
  • |B| = Magnitude of Vector B = 1 unit
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Therefore,

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3 years ago
An AC power source has an rms voltage of 120 V and operates at a frequency of 60.0 Hz. If a purely inductive circuit is made fro
Dmitrij [34]

Answer:

(a) 17634.24 Ω

(b) 0.0068 A

Explanation:

(a)

The formula for inductive inductance is given as

X' = 2πFL................... Equation 1

Where X' = inductive reactance, F = frequency, L = inductance

Given: F = 60 Hz, L = 46.8 H, π = 3.14

Substitute into equation 1

X' = 2(3.14)(60)(46.8)

X' = 17634.24 Ω

(b)

From Ohm's law,

Vrms = X'Irms

Where Vrms = Rms Voltage, Irms = rms Current.

make Irms the subject of the equation

Irms = Vrms/X'...................... Equation 2

Given: Vrms = 120 V, X' = 17634.24 Ω

Substitute into equation 2

Irms = 120/17634.24

Irms = 0.0068 A

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