1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lilit [14]
2 years ago
15

8- A 20 KVA, 440/220 single-phase transformer has winding resistance as 0.090 and

Physics
1 answer:
Maurinko [17]2 years ago
4 0

The total resistance referred to the HV side will be 0.36 ohm.

<h3>What is resistance?</h3>

Resistance is a type of opposition force due to which the flow of current is reduced in the material or wire. Resistance is the enemy of the flow of current.

The total resistance referred to HV side is;

\rm \frac{R_H}{R_L} =(\frac{V_P}{V_S})^2 \\\\ R_H=R_L(\frac{V_P}{V_S})^2\\\\  R_H=0.090 \times (\frac{440}{220})^2\\\\ R_H=4 \times 0.090 \\\\ R_H= 0.36 \ ohm

Hence, the total resistance referred to the HV side will be 0.36 ohm.

To learn more about the resistance refer to the link;

brainly.com/question/20708652

#SPJ1

You might be interested in
5
Brilliant_brown [7]

25+50-30-40 = 0

north and east are positive directions, south and west are negative

hope this helps

also hope u enjoy a pic of my crush lol

3 0
4 years ago
While painting the top of an antenna 275 m in height, a worker accidentally lets a 1.00 L water bottle fall from his lunchbox. T
Tom [10]

Answer:

The force of impact of the water bottle is F = 13,475 N

Explanation:

Given data,

The height of the antenna, h = 275 m

The mass of the 1 L water bottle, m = 1 kg

Let the bottle moves distance immediately after the impact is, d = 0.2 m

The force exerted by the bottle on the bushes at the ground is given by the formula,

                                   F = mgh / d

Substituting the values

                                   F = 1 x 9.8 x 275 / 0.2

                                      = 13,475 N

The value of the force of impact can be reduced by increasing the value of d, it is like the lowering the hand along with the motion of the ball to catch it thereby reduce the force of impact.

The force of impact of the water bottle is F = 13,475 N

8 0
3 years ago
A sheet of paper is about 0.0970 mm thick. what is the volume (in cubic inches) of a standard 8.50 in.×11.0 in. sheet of paper?
umka21 [38]

height = .0970 mm = .00831 inches

Volume = length * breadth * height = 8.5 * 11 * 0.00381

Volume = 0.776985 inches^cube

7 0
3 years ago
Capillary action in trees can transport water from the roots to the tree's branches. The capillaries (Xyelem) in a certain tree
lesantik [10]

Answer:

h=14.2857\,m

Explanation:

Given:

radius of capillary, r=10^{-6}\,m

angle of contact, \theta=0^{\circ}

density of water, \rho=1000\,kg.m^{-3}

surface tension of water, T=0.07 \,N.m^{-1}

height, h = ?

We have the equation for the height of meniscus as:

h=\frac{2T.cos\, \theta}{\rho.g.r}

h=\frac{2\times 0.07\times cos\,0^{\circ}}{1000\times 9.8\times 10^{-6}}

h=14.2857\,m

No, the capillary action alone cannot be the mechanism of water transportation to the top of the trees. Transpiration also creates a suction pressure in the xylem complementary to the ascent of sap and cohesion of water being the other causes of movement of water up in the plants.

6 0
3 years ago
Acartravelingat15m/sstartstodeceleratesteadily.Itcomestoacompletestopin10seconds.Whatisit'sacceleration? a. 1500 m/s b. -1.5 m/s
Amiraneli [1.4K]

Answer:

b. -1.5 m/s²

Explanation:

Given the following data;

Initial velocity = 15m/s

Time = 10 seconds.

Since the car came to rest, final velocity = 0m/s

To find acceleration;

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of final speed from the initial speed all over time.

Mathematically, acceleration is given by the equation;

Acceleration (a) = \frac{initial \; speed  -  final \; speed}{time}

a = \frac{v  -  u}{t}

Where,

a is acceleration measured in ms^{-2}

v and u is initial and final speed respectively, measured in ms^{-1}

t is time measured in seconds.

Substituting into the equation, we have;

Acceleration, a = \frac{0 - 15}{10}

Acceleration, a = \frac{-15}{10}

Acceleration = -1.5 m/s²

6 0
3 years ago
Other questions:
  • What is the reason behind the tail of a comet moving away from the Sun?
    7·2 answers
  • Under what condition will a glass lens placed in a transparent medium becomes invisible??
    12·1 answer
  • A firefighter who weighs 712 N slides down a vertical pole with an acceleration of 3.00 m/s 2 ,directed downward.What are the (a
    14·1 answer
  • As you add more capacitors in series to a constant voltage source, the total energy in the circuit a. decreases b. increases c.
    10·1 answer
  • Which is physical change?
    10·2 answers
  • Consider two concentric cylinders with a Newtonian liquid of constant density, r, and constant dynamic viscosity, µ, contained b
    14·1 answer
  • Pls help me !!! &lt;3333
    11·2 answers
  • Can anybody help me?
    11·2 answers
  • You have a working electrical parallel circuit with three light bulbs, then 1 bulb burns
    15·1 answer
  • A ball is dropped from a window sill and hits the ground in 4.1s. What is the final velocity?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!