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aniked [119]
3 years ago
6

Two Mississippi companies, Howard Industries and Kuhlman Electric Company, are responsible for most of the transformers and powe

r grids produced in the United States and shipped world-wide.
What role does a transformer play in the supply of electricity over long distances?
A) Transformers decrease voltage so electrical energy can safely be transmitted over long distances through wires.
B) Transformers increase voltage before transmitting electrical energy economically over long distances through wires.
C) Transformers decrease voltage before transmitting electrical energy economically over long distances through wires.
D) Transformers convert nuclear energy to electrical energy before transmitting electrical energy economically over long distances through wires.
Physics
2 answers:
xenn [34]3 years ago
8 0
<span>B) Transformers increase voltage before transmitting electrical energy economically over long distances through wires.

Transformers are also used at the other end, to decrease the voltage
from the long-distance transmission lines to go into houses.
 
It turns out that if you pump electricity through the wires at a higher voltage
and lower current, then less of it is LOST on the way from the power station
to its destination.

The saving is so great that it more than pays for the big transformers
at each end of the long-distance electric transmission line. 
</span>
yanalaym [24]3 years ago
5 0
I  think b but  im not sure just helping

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BRAINLEST FOR CORRECT ANSWER
xxMikexx [17]

Answer:

3kg sledgehammer swung at 1.5 m/s

Explanation:

Small Sledgehammer:

Mass:3.0

Velocity:1.5

MASS×VELOCITY=MOMENTUM

3.0×1.5= 4.5 (momentum)

Large Sledgehammer:

Mass:4.0

Velocity:0.9

4.0×0.9=3.6 (momentum)

higher momentum is the smaller Sledgehammer.

3 0
3 years ago
Some students fire a rocket of mass 0.150kg into the air. If at the top of it's flight it has a gravitational potential energy o
mamaluj [8]
PE=mgh
150J=(0.150)*(9.8)*h
h=102m
4 0
3 years ago
Why is honesty especially important in a scientist when the results of an experiment go against predictions❓❔
kramer
Because other scientists and science in general rely on their collegues' research which in turn allows development of our knowledge on the given subject. The more dont-to-earth reason may be safety. If someone performs an experiment without knowledge of its true results it might result in some danger to the safety of those perforning it without knowledge of all the risks.
8 0
3 years ago
. A newly discovered planet has three times the mass and five times the radius of Earth. What is the ratio of the acceleration d
NikAS [45]

Answer:

0.12

Explanation:

The acceleration due to gravity of a planet with mass M and radius R is given as:

g = (G*M) / R²

Where G is gravitational constant.

The mass of the planet M = 3 times the mass of earth = 3 * 5.972 * 10^24 kg

The radius of the planet R = 5 times the radius of earth = 5 * 6.371 * 10^6 m

Therefore:

g(planet) = (6.67 * 10^(-11) * 3 * 5.972 * 10^24) / (5 * 6.371 * 10^6)²

g(planet) = 1.18 m/s²

Therefore ratio of acceleration due to gravity on the surface of the planet, g(planet) to acceleration due to gravity on the surface of the planet, g(earth) is:

g(planet)/g(earth) = 1.18/9.8 = 0.12

3 0
3 years ago
PLEASE HELP!!! FIRST IS BRAINLIEST!!!
Verizon [17]
1. A Medium

2.  One of these 4, the refractive index of the medium  <span>Choose whichever are on the test.

3. </span>properties and nature of medium, Hope this helps.
6 0
3 years ago
Read 2 more answers
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