Explanation:
Energy conservation is the effort made to reduce the consumption of energy by using less of an energy service. This can be achieved either by using energy more efficiently (using less energy for a constant service) or by reducing the amount of service used (for example, by driving less). Energy conservation is a part of the concept of Eco-sufficiency. Energy conservation reduces the need for energy services and can result in increased environmental quality, national security, personal financial security and higher savings.It is at the top of the sustainable energy hierarchy. It also lowers energy costs by preventing future resource depletion.
Energy can be conserved by reducing wastage and losses, improving efficiency through technological upgrades and improved operation and maintenance. On a global level energy use can also be reduced by the stabilization of population growth.
Energy can only be transformed from one form to other, such as heat energy to motive power in cars, or kinetic energy of water flow to electricity in hydroelectric power plants. However machines are required to transform energy from one form to other. The wear and friction of the components of these machine while running cause losses of very high amounts of energy and very high related costs. It is possible to minimize these losses by adopting green engineering practices to improve life cycle of the components.
Hope this helps u ......Explanation:
ElectAltEngOnl.19-20.SEC - Theodore Neitzel
1 of 3
Dada:
+
Automatic Zoom
D. The strength of an electric field.
Use the following scenario to answer question 2.
Some students took a study break and played Guitar Hero on their PlayStation. They used a TV
requiring 1.75 amps and a PlayStation requiring 0.75 amps. Assume electricity costs $0.15 per
kWh and they used 120V outlets.
2. What is the resistance of the TV?
A. 68.6 amps
B. 210 amps
C. 68.6 ohms
D. 210 ohms
Answer:
Option C is correct.
The resistance of the TV = 68.6 ohms.
Explanation:
According to Ohm's law, the voltage across a device is equal to the product of the current through the device and the resistance across the device.
Since electrical appliances are setup in parallel connection, the voltage across the TV and the PlayStation is the same and is 120 V.
V = IR (From Ohm's law)
V = voltage across the TV = 120 V
I = current flowing through the TV = 1.75 A
R = Resistance of the TV = ?
120 = 1.75 × R
R = (120/1.75) = 68.57 ohms = 68.6 ohms.
Hope this Helps!!!
what is the symbol name?
Answer:
cell
Explanation:
here are all the symbols-
hope this helps, take care and stay safe
Which statement about velocity is true?
Answer:
Velocity has both speed and direction. Speed is constant. ... Speed is measured over time.
Explanation:
How the like and unlike poles of magnets interact
Answer:
like repel unlike attract
Explanation:
mmwwwwwww
Atividade 4 - Num chuveiro ligado nas posições verão e inverno, com as seguintes características: 220V – 2200W/4400W. Calcule a corrente elétrica que circula na potência menor (verão) e maior (inverno), com a mesma tensão. Dica: isole a corrente elétrica na expressão P= i x U
Explanation:
The characteristics for a shower connected in summer and winter positions is 220 V - 2200 W / 4400 W.
It means lowest power is 2200 W and highest power is 4400 W
For lowest power,
[tex]P=VI[/tex]
I = electric current for summer
[tex]I=\dfrac{P}{V}\\\\I=\dfrac{2200}{220}\\\\I=10\ A[/tex]
For highest power,
[tex]P'=VI'[/tex]
I' = electric current for winters
[tex]I'=\dfrac{P}{V}\\\\I'=\dfrac{4400}{220}\\\\I'=20\ A[/tex]
Hence, for lowest power, current is 10 A ad for highest power, current is 20 A.
The chart shows the power ratings of 3 clothes dryers and the time needed to dry a load of 10 towels.
power/time
x/4,370/25
y/4,420/22
z/4,150/26
What is the difference in energy used between the dryer that uses the greatest amount of energy and the dryer that uses the least amount?
Answer:
12010
Explanation:
Given:
power time
4,370 25
4,420 22
4,150 26
To find: difference in energy used between the dryer that uses the greatest amount of energy and the dryer that uses the least amount
Solution:
Energy = power × time
For clothes dryer x:
energy = 4370 × 25 = 109250
For clothes dryer y:
energy = 4420 × 22 = 97240
For clothes dryer z:
energy = 4150 × 26 = 107900
Dryer x uses the greatest amount of energy and dryer y uses the least amount of energy.
Difference in energy used between the dryer that uses the greatest amount of energy and the dryer that uses the least amount = 109250 - 97240 = 12010
Answer:
.20 kWh
Explanation:
its right on edge
When observed from Earth, the wavelengths of light emitted by a star are shifted toward the red end of the
electromagnetic spectrum. Why does this redshift occur?
Answer: The redshift occurs because the starts are moving away from the earth.
Explanation:
Every object emits wavelength from its body. When it comes to universe there are some visible light emitted by the stars and other objects in galaxy.
If a star is moving towards the sun then it emits a shorter wavelength compared to the source which is at rest. This is blue in color called as blue shift.
But when it comes to stars they move away from the earth and hence emits longer wavelength called as red shift.
As the object it at rest it more towards the blue side and when the objects starts moving it starts moving towards the red side in the visible spectrum.
So, when the starts moves away from the earth it forms a Redshift.
When observed from Earth, the wavelengths of light emitted by a star are shifted toward the red end of the electromagnetic spectrum because: the star is moving away from planet Earth.
A star is a giant astronomical or celestial object that contains a luminous sphere of plasma and bounded together by its own gravitational force.
A redshift can be defined as a displacement (shift) of the spectral lines of celestial or astronomical objects toward longer wavelengths (the red end of an electromagnetic spectrum), as a result of the Doppler effect.
Hence, a redshift is considered to be a subtle change in the color of visible electromagnetic radiation from stars (starlight), as observed from planet Earth.
In conclusion, a redshift occur when observing a star from planet Earth because the star is moving away from planet Earth.
Read more: https://brainly.com/question/17934476
9. A sports car travels on a straight road at 22.0 km/h and increases its speed to 57.0 km/h in
5.0 s. Find the car's acceleration in m/s?.
Answer:
4.4 M/s
Explanation:
What is food insecurity?
the state of being without reliable access to a sufficient quantity of affordable, nutritious food.
the state of being without food for at least five days
the state of being without food until mom or dad goes grocery shopping
the state of not cooking your own food to feed yourself
Answer:
The state of being without reliablr access to a sufficient quantity of affordable, nutritious food
Question 8 of 10
2 Points
A scientist gives three trees of the same size and species different amounts
of water all summer. He measures how fast the trees grow. What is the
independent variable in this experiment?
A. The amount of water
B. The growth rate of the trees
C. The month the trees are measured
D. The size of the trees
SUBMIT
A. The amount of water. 50/50
SOMEONE HELP W THESE QUESTIONS PLEASEEE
3m/s²
5m/s²
I hope it helps
What is the definition of work in Physics?
Answer:
the mental and physical activities carried out by using energy are generally termed as work
What is the primary way that metamorphic rocks forms?
Answer:
where the rocks are exposed to really hot conditions and high pressure....these conditions are found deep where tectonic plates meet or deep inisde the earth past our core
hope this helps !!!!!
Answer:
high heat, high pressure, hot mineral-rich fluids or commonly a combination of these found deep in the Earth or where tectonic plates meet.
Explanation:
I hope this helps :3
WILL BE MARKED BRAINLIEST
IF CORRECT
In what ways are electromagnetic waves differed from mechanical waves?
A. Electromagnetic waves can only travel through matter.
B. Electromagnetic waves transfer matter through empty space.
C. Electromagnetic waves are longitudinal waves
D. Electromagnetic waves can travel through empty space
Answer:
C. Electromagnetic waves are longitudinal waves
Explanation:
Answer:
the answer is c
Explanation:
Convert the following:
a)2500 kilogram into gram.
b)335 hours into seconds.
c)1 day into seconds.
Explanation:
A) 1 kg = 1000g
2500kg = 2500000g
B 1 hour = 3600 sec
335 hour = 1206000sec
C 1day = 24 hours
1 hour = 3600 sec
24 hours = 86400sec
Answers:
a. 2500000 grams
B. 1206000 seconds
c. 86400 seconds.
Look at the attached picture
Hope it will help you
Good luck on your assignment
If the speed and mass of an object are doubled, which of the following is true?
A) The momentum of the object is doubled
B) The kinetic energy of the object is doubled
C) The momentum of the object is quadrupled
D) The kinetic energy of the object is multiplied by 8
E) The momentum and the kinetic energy of the object are quadrupled
Answer:
A is true
Explanation:
Other all are wrong I guess
Answer: The Answer is A
Explanation:
I'm not sure but
P = Momentum
P = Mass x Velocity
P = (M XV)^2
P^2
What happens to momentum when two objects collide
Answer:
The sum of momenta of each object before and after collision is equal . Thus when they collide , their momentum will change but its sum will be sane as the sum of the momentum before collision
1. Two spherical objects have masses of 300 kg and 140 kg. Their centers are separated by a
distance of 1.7 m. Find the gravitational attraction between them.
The concept that must be used to solve this problem is linked to Newton's laws of gravitation. Newton defined the gravitational attraction force as the product between the universal constant of gravitation, by the masses of each object, all this because of the change in the squared distance that separates them, mathematically it can be expressed as,
[tex]F_G = \frac{G m_1 m_2}{r^2}[/tex]
Here,
G = Gravitational Universal Constant
[tex]m_{1,2}[/tex] = Mass of each object
r = Radius
Our values are,
[tex]G = 6.67*10^{-11}N\cdot m^2/kg^2[/tex]
[tex]m_1 = 300kg[/tex]
[tex]m_2 = 140kg[/tex]
[tex]r = 1.7m[/tex]
Replacing,
[tex]F_G = \frac{(6.67*10^{-11}N\cdot m^2/kg^2 )(300kg)(140kg )}{(1.7m)^2}[/tex]
[tex]F_G = 9.7*10^{-7} N[/tex]
Is a tomatoes a substance of a acid or a base
I think tomato is acid
Answer:
acid
Explanation:
tomatoes contain acids such as citric acid, ascorbic acid, abscisic acid etc.
this indicates that they are acidic
A box is pulled to the right with a force of 65 n at an angle of 58 degrees to the horizontal the surface of frictional is the Freebody diagram shown what is the net force of the X direction
Answer:
The force acting in x direction is 34.44 N
Explanation:
We have,
Force acting on the box is 65 N at an angle of 58 degrees to the horizontal the surface of frictional.
It is required to find the net force in x- direction.
The net force acting in the x- direction is given by :
[tex]F_x=F\cos\theta\\\\F_x=65\times \cos(58)\\\\F_x=34.44\ N[/tex]
So, the force acting in x direction is 34.44 N.
What are greenhouse gasses? How does carbon dioxide enter the atmosphere? (Site 1)
Answer:
greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range
Explanation:
Animals and plants need to get rid of carbon dioxide gas through a process called respiration. Carbon moves from fossil fuels to the atmosphere when fuels are burned.
Answer and explanation:
Greenhouse gases are carbon dioxide, water vapor, fluorinated gases, nitrous oxide, methane, and others. Carbon dioxide enters the atmosphere by respiration of plants, animals, and microbes. Plants also remove carbon dioxide during photosynthesis. The net result is that plants remove more carbon dioxide than they contribute. Microbes and fungi that decompose plants and animals also return the carbon to the atmosphere as carbon dioxide. These are all ways nature cycles carbon. Humans contribute carbon dioxide to the atmosphere when we burn wood, solid waste, and fossil fuels. When forests are burned to clear land, not only does the burning release carbon dioxide, but it eliminates trees that would otherwise be removing carbon dioxide by photosynthesis. Most of the human contribution is from burning fossil fuels in electrical power plants that burn coal or natural gas and in vehicles that run on petroleum products. Other industrial processes also contribute carbon dioxide to the atmosphere, but to a lesser extent.
Sonar question: A person's yells into a deep well, sending a sound wave that travels at a speed of 50 m/s. The echo is heard in 6 seconds.
How deep is the well? Remember, speed distance/time
Zona onde não incide luz visível devido à interposição de um objeto opaco.
Answer:
can you please translate to english?
Explanation:
He discovered that electricity could be mae by moving a magnet inside a wire coil
Answer:
Michael Faraday
Explanation:
Electromagnetic Induction was first discovered way back in the 1830's by Micahel Faraday. Faraday noticed that when he moved a permanent magnet in and out of a coil or a single loop of wire it induced an ElectroMotive Force or emf, in other words a Voltage, and therefore a current was produced.
Describe the relationship between a moving object's mass and its kinetic energy.
Answer:
[tex]E=\dfrac{1}{2}mv^2[/tex]
Explanation:
If m is the mass of the object and v is the velocity of the object. The kinetic energy is due to the motion of an object. It is given by the relation as follows :
[tex]E=\dfrac{1}{2}mv^2[/tex]
The above formula is used to find the kinetic energy of an object.
Why are experiments often performed in laboratories?
O A. They are better at representing the real world.
O B. There are fewer variables to control.
C. Scientists only want to know what happens in labs.
O D. It is harder to control variables in a laboratory.
Answer:
B
Explanation:
Laboratories are usually controlled: however, in public places, there are way too many factors that could change an experiment
Can someone answer these questions
I’ll give you brainliest
1. How do YOU think a rocket/space shuttle goes into outer space
2. Newton had 3 laws about motion. Please look up his 3rd one and write it down here.
3. How is this law related to how a rocket/space shuttle goes into outer space
4. What was the purpose of the SpaceX Crew Dragon mission
5. Who were the 2 astronauts involved
6. Where was the spaceX Dragon going
7. Were the takeoff and landing successful
8. How might this mission help future space travel
Answer:
1. Following the recoil principle, rockets use combustion (a controlled explosion) to work against earth's gravitational attraction.
2. A force is a push or a pull that acts upon an object as a results of its interaction with another object. ... These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction.
(via physicsclassroom.com)
3. The combustion throws out material with very high momentum and is, physically speaking, the action. In reaction to that that, the rocket moves away from it (upward when in starts and has the action underneath it)
4. To show the world that commercial manned space missions are safely possible. Some may also like the fact that the US can now do, or rather order, manned flights into space without the help of the russian space agency (Roskosmos).
5. Robert Behnken and Douglas Hurley
6. The international space station (ISS)
7. Yes, Stage 1 of the rocket landed on the drone ship. The crew opened the hatch to enter the space station after 21 hours and 39 minutes after the launch from Cape Canaveral.
8. To have private contractors such as SpaceX actively in the field, there are now more interest groups that participate in space travel. And they can interact with other companies as well.
Also, due to Musks dream and efforts of SpaceX, space travel seems to get a lot cheaper.
That might indeed open the way back to the moon and further to the Mars for human space flight.
Governments such as the US planned on such things for decades, but changed plans ever since, and routinely changed leadership and the opinion on what's important.
Now Spaceflights can become less politically motivated and more commercially. That seems to be a more stable way over long periods of time.
(wrote most of it for you myself, even tough I'm not a native English speaker. would really appreciate the brainliest if you appreciate the work)
Answer:
yhgfty
Explanation:
cdfgv
Is weightlifting an example of newton's 3rd law of motion? if so explain.
What is Newton's Law of Conservation of Momentum?
Answer: The law of conservation of linear momentum helps to understand the behavior of a Newton's cradle In a closed system. This law is nothing more than action and reaction.it can be used to predict the resulting direction and speed of motion of objects after they collide.
Explanation: Just as an example, when you play pool/8ball, the white play exerts force on the other balls causing them to break away.
hope this helps.
What is work?
A. Force times an object's displacement
OB. The distance an object moves over time
C. The time it takes an object to move a certain distance
O D. The force that distance makes
SUBMIT