A current is always developed in the secondary of a transformer. true or false

Answers

Answer 1

Answer: false. only when supply 'alternate' current in the primary.

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Ninety-nine percent of all the matter that can be observed in the universe exists asA. gases.
B. plasmas.
C. liquids.
D. solids.

Answers

Answer:

B. plasma.

Explanation:

There are four main states of matter:

1. solid

2. Liquid

3. Gas

4. Plasma

Plasma is a state in which 99% of all matter present in the universe exists. It is highly conducting ionized gas. The electric field and magnetic field dominate the behavior of plasma. Plasma is electrically neutral but the positive and negative particles are unbound.

Plasma is the most common state of matter in the universe.

Plasma, the most abundant phase in the universe...

What is 3xY=4w solve for y
in formula transformation

Answers

I can't tell if the 'x' in the question is another variable, or the symbol for 'times'.
Here are the answers both ways:

3 times Y = 4w
Divide each side of the equation by 3 :
Y = (4/3) w

3xY = 4w
Divide each side of the equation by 3 :
xY = (4/3) w
Divide each side by 'x' :
Y = (4w) / (3x)

$3y = 4w \n y = 4/3 w$

$3xy = 4w \n 3y=4w/x \n y = 4w / 3x$

How many 176 ohm resistors are connected in series to get a current of 5 a on 220 v battey

Answers

Total resistance = voltage / current = 220 / 5 = 44 ohms .

Even one 176-ohm resistor is too much. The current through it is 1.25 A,
and more than one of them in series reduces the current even further.

Connecting them in parallel, however . . .

Four resistors of 176-ohms each, in parallel, have a net effective resistance
of 176/4 = 44 ohms ... exactly what you need to do the job.

Define density and give its SI unit

Answers

Answer:

Density is defined as mass per unit volume. its SI unit is: kg/m³

Explanation:

Answer:

Density is defined as mass per unit volume. its SI unit is: kg/m³

Explanation:

from answer above

A sample that is treated exactly like the other experimental groups except that the variable is not applied to it is a(n) _____. a. observation
b. variable
c. control
d. hypothesis

Answers

This is a "control" - answer c).

You always need a control in an experiment, otherwise you don't know what influenced the changes. Imagine you make children eat more vegetables and they grow - do you know if it's due to vegetables or not? You need to have another group that eats normal amounts of vegetables to compare this.

Choose the best answer for each situation. A scientist with the EPA examining water for contamination writes down that there was an iridescent sheen on the surface of the water. What type of data did the scientist record?

Answers

The scientist has written down and example of qualitative data. Since he specifically wrote down that there was an iridescent sheen on the surface of the water, he is writing down the quality of water as seen by him. The type or condition cannot be expressed numerically, which makes it a qualitative type of data.

Other Questions

A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and freuency of 2.55 Hz.(a) what's the maximum speed of the needle ?(b) what's the maximum acceleration of the needle ?

1. A substance which allows visible light to pass through freely is ______. A. opaque B. reflective C. transparent D. translucent2. A substance can be opaque to certain wavelengths of electromagnetic radiation, but transparent to others. A. True B. False3. _______ is when either the vertical or the horizontal component of light waves is eliminated.A. RefractionB. ScatteringC. TransmissionD. Polarization

The magnitude of the electric current is directly proportional to the _____________ of the electric field.

How far away is Earth from the Sun?a. 93 miles b. 93 thousand milesc. 93 million milesd. 93 billion miles