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Alborosie
3 years ago
11

1.

Physics
2 answers:
Harlamova29_29 [7]3 years ago
7 0
1.renewable energy
2.renewable energy
3.Turning off the lights when you are not in a room
4.conservation of energy
5.Driving an SUV
6.stored energy
7.Always from one side to another
8.use our energy resources wisely
9.conservation of energy
10.by either moving liquids or moving air currrents
11.potential energy
12.radiation
13.insulators
14.radiation
15.Evaporation
16.Thermal energy moves to an object with less heat.
17.Burning your finger on a hot match
18.potential energy
19.Energy is never being created or destroyed.
20.touching each other
AnnZ [28]3 years ago
6 0

Explanation:

1. Renewable Energy. These sources are natural sources of energy and has zero emission in comparison to the fossil fuels.

2. Renewable Energy. As Sun light is natural and will last forever.

3. Taking long, hot showers. As this activity is resulting in waste of energy it can not show energy conservation.

4. Conservation of Energy. According to the law the total of all the energy in an isolated system remains constant i.e. conserved.

5. Turning off the lights when you are not in a room. As this activity is resulting in saving energy.

6. Stored energy. Potential energy is the energy stored or held by any object because of its position.

7. Always to a place of lower thermal energy. The flow of thermal energy causes heat and it always moves from high temperature to low temperature.

8. Use our energy resources wisely. Conservation of energy means using the resources wisely. You might think that we should recycle all of our energy. But most of the time that is not possible.

9. Conservation of Energy. According to the law the total of all the energy in an isolated system will always remain constant i.e. conserved. It means it cannot be destroyed or created. It can only be converted from one type of energy to another.

10. By either moving liquids or moving air currents. Convection is a process of energy transfer where hot particles of liquid or gas move up loses energy, dive down and are replaced by hotter particles.

11. Potential energy. Potential energy is the energy stored. In the batteries chemical energy is stored which get converted to electrical energy for the flashlight to work.

12. Conduction. As the heat energy will be transferred through the water molecules which are in contact with each other.

13. Insulators. These are the objects which do not conduct heat well. Example: Wood.

14. Radiation. The energy of the Sun or stars is transferred through electromagnetic radiations.

15. Convection. In convection the heat is transferred through the motion of particles. Here the hot water will move up and cold water will move down.

16. Thermal energy moves to an object with less heat.

17. Burning your finger on a hot match. Because for conduction to happen the two objects must touch each other.

18. Potential energy.

19. Energy is never being created or destroyed.

20. Touching each other.

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You have been training and can run a mile in 6.5 minutes. How long would it take to run a lap around the outside track, which is
Paha777 [63]

Answer:

1 minute 36.85 seconds

Explanation:

First we need to convert the miles into meters, as the demanded result should be in meters.

1 mile = 1,609.34 meters

Also, 6.5 minutes should be converted into seconds.

1 minute = 60 seconds

6.5 x 60 = 390 seconds

Now we need to divide the miles with the seconds to see how much meters have been run in a second.

1,609.34 / 390 = 4.13 meters

The suggested meters now should be divided with the distance run in one second.

400 / 4.13 = 96.85 seconds

So we get a result of 96.85 seconds, or 1 minute 36.85 seconds.

5 0
3 years ago
In Europe, gas cost approximately €0.98 per liter. How many dollars($) per gallon is this? ​ using a factor method
bixtya [17]

Answer:

€0.98 per liter = 4.377 doller per gallon

Explanation:

It is given that, In Europe, gas cost approximately €0.98 per liter. We need to convert it into dollars($) per gallon.

We know that, 1 euro = 1.18 United States Dollar

1 litre = 0.264172 US gallon

Cost of gas in Europe is €0.98 per liter.

0.98\ \text{euro/ liter}=\dfrac{0.98\times 1.18\ \text{doller}}{0.264172\ \text{gallon}}\\\\=4.377\ \text{doller/gallon}

5 0
3 years ago
An 877 kg drag race car accelerates from rest to 116 km/h in 0.951 s. What change in momentum does the force produce? Answer in
Eduardwww [97]

Answer:

The change in momentum is 28265.71  kg-m/s.

Explanation:

Given that,

Mass of a car, m = 877 kg

Initial velocity of the car, u = 0 (at rest)

Final velocity of the car, v = 116 km/h = 32.23 m/s

Time, t = 0.951 s

We need to find the change in momentum produced by the force. It can be calculated as the difference of final momentum and the initial momentum.

\Delta P=m(v-u)\\\\=877\times (32.23-0)\\\\=28265.71\ kg-m/s

So, the change in momentum is 28265.71  kg-m/s.

7 0
3 years ago
An engine absorbs 1.69 kJ from a hot reservoir at 277°C and expels 1.25 kJ to a cold reservoir at 27°C in each cycle.
Anna35 [415]

Answer

Given,

Energy absorbed, Q_H = 1.69\ kJ

Energy expels,Q_C =  1.25\ kJ

Temperature of cold reservoir, T = 27°C

a) Efficiency of engine

 \eta = \dfrac{Q_H - Q_C}{Q_H}\times 100

 \eta = \dfrac{1.69 - 1.25}{1.69}\times 100

\eta =26.03 %

b) Work done by the engine

 W = Q_H- Q_C

 W =1.69 - 1.25

 W = 0.44\ kJ

c) Power output

     t = 0.296 s

   P = \dfrac{W}{t}

   P = \dfrac{0.44}{0.296}

   P = 1.486\ kW

8 0
3 years ago
What happens when bromine reacts with carbon?
serious [3.7K]
D. Electrons are shared between the bromine atoms and carbon atoms
4 0
3 years ago
Read 2 more answers
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