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3 years ago

Complete the missing words

Physics

1 answer:

Goryan [66]3 years ago

5 0

-Biogas is a mixture of Methane and carbon dioxide.

-It is produced when microorganisms digest waste material.

-Biogas is burned, and the energy can be used for cooking,eating and lighting.

<h3 /><h3>What is biogas?</h3>

Biogas is a combination of gases made from agricultural waste, manure, municipal trash, plant material, sewage, green waste, and food waste.

Biogas

-Biogas is a mixture of Methane and carbon dioxide.

-It is produced when microorganisms digest waste material.

-Biogas is burned, and the energy can be used for cooking,eating and lighting.

Bioethanol

-Ethanol can be made by fermentation.

-Fermentation is the process of using yeast to convert the sugar into ethanol.

-Carbon dioxide is always produced.

-The fermented mixture can be distilled to produce more concentrated biogas.

-Bioethanol is quite cheap to produce.

-Ethanol can be used as a fuel, it only gives just carbon-neutral carbon dioxide and water.

Advantages: Crops grown for bioethanol production take-in water, carbon di oxide from the atmosphere. This goes some way toward bioethanol carbon dioxide and water.

Disadvantages: The price of crops can increase growing plants for the production of bioethanol may mean that land

-Bio-fuels-what are they and where they come from?

-Biofuel is fuel made from the living organisms or a by-product of waste, and vegetable oil.

-Biofuel currently being produced from waste, vegetable oil and sugarcane is already sustainable.

It comes from planting crops that can be planted and harvested every year.

Advantages:

Bio diesel is less expensive than regular diesel.

Releases less pollution than ordinary diesel.

Disadvantages: We can't make enough. Biodiesel is Toxic

Hence, Biogas is a mixture of Methane and carbon dioxide.

To learn more about biogas, refer to the link;

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A styrofoam container used as a picnic cooler contains a block of ice at 0°C. If 325 g of ice melts in 1 hour, how much heat ene

Sauron [17]

Answer:

30.0625 W

Explanation:

325 g/h x (1h x 1kg)/(3600s x 1000g) x 3,33 x 10^5 J/Kg = 30.0625 J/Kg = 30.0625 W

8 0

4 years ago

You make the following measurements of an object 42kg and 22m3 what would the objects density be

miv72 [106K]

The density of the object is approximately 1.91 kg per m³.

42 kg is a measure of mass, and 22 m³ is a measure of volume. Knowing this, you can use the relationship $density = mass / volume$ to solve for the object's density.

42 kg $\div$ 22 m³ $\approx$ 1.91 kg per m³.

4 0

3 years ago

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Two cars are heading towards one another. Car A is moving with an acceleration of aA = 4 m/s2. Car B is moving with an accelerat

Paladinen [302]

Answer:

Car B reaches car A in 19.7 s.

Explanation:

Hi there!

The equation of the position of an object moving in a straight line at constant acceleration is as follows:

x = x0 + v0 · t + 1/2 · a · t²

Where:

x = position of the object at time t.

x0 = initial position.

v0 = initial velocity.

t = time.

a = acceleration

When both cars meet, their positions are the same. At the meeting point:

position of car A = position of car B

xA = xB

x0A + v0A · t + 1/2 · aA · t² = x0B + v0B · t + 1/2 · aB · t²

Let´s place the origin of the frame of reference at the point where A is located. In that case x0A = 0 and x0B = 2900 m. Since both cars are initially at rest, v0A and v0B = 0. So, the equation gets reduced to this:

1/2 · aA · t² = x0B + 1/2 · aB · t²

If we replace with the data we have and solve for t:

1/2 · 4 m/s² · t² = 2900 m - 1/2 · 11 m/s² · t²

2 m/s² · t² = 2900 m - 5.5 m/s² · t²

5.5 m/s² · t² + 2 m/s² · t² = 2900 m

7.5 m/s² · t² = 2900 m

t² = 2900 m / 7.5 m/s²

t = 19.7 s

Car B reaches car A in 19.7 s.

4 0

4 years ago

The reason why the position of an electron cannot be measured with absolute precision is:

LenKa [72]

They are too small are never in the same place. Electrons are constantly moving in random motion within the electron cloud, making them impossible to follow.

5 0

3 years ago

Use the drop-down menus to identify the type of energy each phrase describes.

Tresset [83]

The shortest wavelength of visible light = violet light

Energy that can be felt as heat but not seen = infrared

Short, invisible rays that can cause eye damage = ultraviolet

Visible light with the longest wavelength = red light

Explanation:

Electromagnetic waves are waves consisting of oscillations of the electric and the magnetic field, occurring in a plane perpendicular to the direction of motion the wave.

They are the only type of waves able to travel without a medium, and they are transverse in nature.

All electromagnetic waves travel in a vacuum at the speed of light, which value is:

$c=3.0\cdot 10^8 m/s$

Electromagnetic waves are classified into 7 different classes, depending on their wavelength/frequency, and they have different properties. From shortest to longest wavelength (and from highest to lowest frequency), they are:

Gamma rays

X rays

Ultraviolet

Visible light

Infrared radiation

Microwaves

Radio waves

Moreover, the visible light of the spectrum is further divided into different colors, according to how our eye perceive them; from shortest to longest wavelength:

violet

blue

green

yellow

orange

red

Therefore, we have:

The shortest wavelength of visible light is violet light, which has wavelength between 380 and 450 nm
The longest wavelength of visible light is red light, which has wavelenght between 620 and 750 nm
Infrared radiation is a type of radiation that is felt as heat by our body, however it cannot be seen because it falls outside the spectrum of visible light
Ultraviolet radiation is also invisible to human eye; it has shorter wavelength than visible light and therefore it has more frequency (and more energy), therefore it can cause damage, especially to the eye

Learn more about electromagnetic waves:

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4 years ago

Read 2 more answers