Multiple Choice
1. Think About the definition of remote sensing. Which of the following could be considered sensors?
2. When satellite images are analyzed a unit called the pixel is a key to calculating what?
3. One Pixel represents.
a temperature
a wind speed of 10 kilometers per hour
a land area of 30 by 30 meters
various colors depending on their size

Answer:

ty

Explanation:

Answer:

A. light energy is used in photosynthesis and created by respiration

Answer:

b

Explanation:

i think its b because theories are usually developed after many experiments/tests by different scientists. at least i think so lol i dont remember too much from biology

Answer:

9.598 × 10⁻¹¹ m

0.09598 nm

9.598 × 10⁻⁹ cm

Explanation:

Step 1: Given data

Distance between oxygen and hydrogen in water (d): 95.98 pm

Step 2: Convert "d" to meters

We will use the conversion factor 1 m = 10¹² pm.

95.98 pm × 1 m/10¹² pm = 9.598 × 10⁻¹¹ m

Step 3: Convert "d" to nanometers

We will use the conversion factor 1 m = 10⁹ nm.

9.598 × 10⁻¹¹ m × 10⁹ nm/1 m = 0.09598 nm

Step 4: Convert "d" to centimeters

We will use the conversion factor 1 m = 100 cm.

9.598 × 10⁻¹¹ m × 100 cm/1 m = 9.598 × 10⁻⁹ cm

Answer:

B. Moderately active metal

Explanation:

Answer:

Molarity of our solution= 0.46=0.5

Explanation:

When diluting a solution we can use the formula: 1 1 = 2 2

= M= Molarity of the solution

=V=volumes

On the left side, we'll put what we know/already have and on the right side of the formula we'll put down what we want to dilute it to.

Let's plug in what we already know.

(0.700M)(2L) = (M2)(3L)

Solve for M2 by dividing both sides by 3 so M2 will be by itself.

(0.700M)(2L)/(3L) = M2

M2= 0.46, we can round it up to 0.5

Answer:  

50 milliliters of acetone solution

Explanation:

If a solution is 40% by volume of acetone, then we have  40 mL of acetone in a 100 mL solution. So if we have 20 mL of acetone, we get: 100 mL solution 40 mL ( CH3) 2CO⋅

20mL (CH3) 2CO  =50mL solution

The volume percent of 40% indicates that 40 ml of acetone is present in 100 ml solution. Then, 20 ml acetone can be made into 50 ml solution.

Volume percentage is a common term used to express the concentration of a solution. Volume percentage of a solution is the ratio of the volume of the solute to the volume of the solvent multiplied by 100.

The volume percentage of the solution measures how much volume of the solute is present in 100 ml of the solution. Thus a 50% by volume solution is 50 ml solute in 100 ml solution.

Given that volume percentage of acetone = 40%.

that is 40 ml of acetone is present in 100 ml of the solution.

Therefore, the volume of the solution containing 20 ml of acetone is :

(20 × 100)/40 = 50 ml.

Therefore, 50 ml of  40% by volume o solution can be made by 20 ml of acetone.

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(ANS1)— P4 + 5O2 ---> 2P2O5

(ANS2)— C3H8 + 5O2---> 3CO2 + 4H20

(ANS3)— Ca2Si + 4Cl2 ---> 2CaCl2 + SiCl4

Answer:

(ANS1)— P4 + 5O2 ---> 2P2O5

(ANS2)— C3H8 + 5O2---> 3CO2 + 4H20

(ANS3)— Ca2Si + 4Cl2 ---> 2CaCl2 + SiCl4

Explanation:

The new volume of the neon gas as its temperature is reduced is 2.29L.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

V₁/T₁ = V₂/T₂

Given the data in the question;

To determine the new volume of the neon gas, we substitute our given values into the expression above.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂ / T₁

V₂ = ( 2.5L × 298.15K ) / 325.15K

V₂ = 745.375LK / 325.15K

V₂ = 2.29L

Therefore, the new volume of the neon gas as itstemperature is reduced is 2.29L.

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Answer:

The pressure of the gas at 23 C is 179.92 kPa.

Explanation:

Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

In short, when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases.

Gay-Lussac's law can be expressed mathematically as follows:

[tex]\frac{P}{T} =k[/tex]

Studying two states, one initial 1 and the other final 2, it is satisfied:

[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]

In this case:

Replacing:

[tex]\frac{310 kPa}{510 K} =\frac{P2}{296 K}[/tex]

Solving:

[tex]P2=296 K*\frac{310 kPa}{510 K}[/tex]

P2= 179.92 kPa

The pressure of the gas at 23 C is 179.92 kPa.

Answer:

When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide.

Explanation:

Because your muscles are working harder when you exercise, your body requires more oxygen and produces more carbon dioxide.

Exercise is characterized as a physiological movement that maintains or enhances total physical wellness. People who exercise are less likely to get diseases and to maintain a healthy weight. Type 2 diabetes, heart disease, high blood pressure, and weight gain can all be warded off with regular exercise. Leaping, jogging, or lifting weights are examples of exercises that can support bone health.

The lungs both provide the body with oxygen, which gives you energy, and remove carbon dioxide from the system, which is a byproduct of energy production. The heart pumps oxygen-rich blood to the working muscles. Because your muscles are working harder when you exercise, your body requires more oxygen and produces more carbon dioxide.

Thus, because your muscles are working harder when you exercise, your body requires more oxygen and produces more carbon dioxide.

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Answer:

11 g

Explanation:

Answer:

Sulfur has the same amount, like all the other elements in group 16, has six valence electrons.

Explanation:

Answer:

give me the question and I can help you

Answer:

Sulfate loses 2 electrons to sulphur dioxide.

Answer:

1) it takes 13 second

2) 2100 miles

3) 40 miles / hours

4) 730 meters

Answer:

46.9 atm

Explanation:

Applying Van der waals equation

P = [nRT/(V-nb)]- (an²/V²)............... Equation 1

Where P = pressure, T = temperature, n = number of moles, V = volume, R = Universal constant, a and b = gas constant

Given: n = 20 moles, R = 0.08205 L.atm/mol.K, T = 273 K, V = 10.0 L, a = 0.0341 atm.L²/mol², b = 0.0237L/mol

Substitute these values into equation 1

P = [(20×0.08205×273)/(10-20×0.0237)]-(0.0341×20²/10²)

P = (447.993/9.526)-0.1364

P = 47.028-0.1364

P = 46.9 atm

Answer:

0.326 mol. is the answer.

Explanation:

No. of moles = Volume (L) / Volume at STP

N = 7.3 / 22.4

N = 0.326 moles

Explanation:

A matchstick has a lot of chemical energy stored in it. When the match is struck, it burns and the chemical energy in it produces heat energy and light energy.

brainliest and follow and thanks

Answer:

I think it might be liquid

Answer: in a molecular molecules move just enough to stay close together but not to stick

Explanation:

Answer: acttachec pic

The last carbon have the H on there, forgot to put it in :)

The Fischer projection of L-ketononose is:

  H

  |

CH₂OH-C=O-H

  |

  C

  |

  CH₂OH

Fischer projection is a two-dimensional representation of a three-dimensional molecule. In Fischer projection, the carbon atoms are drawn as vertical lines, and the hydrogen atoms and hydroxyl groups are drawn on the right-hand side or left-hand side of the carbon atoms. The carbonyl group is always drawn at the top of the Fischer projection.

The L-configuration is a type of configuration that is assigned to organic molecules based on the orientation of the hydroxyl group on the penultimate carbon atom. If the hydroxyl group is on the left-hand side of the Fischer projection, the molecule is assigned the L-configuration. If the hydroxyl group is on the right-hand side of the Fischer projection, the molecule is assigned the D-configuration.

In the Fischer projection of L-ketononose, the hydroxyl group on the penultimate carbon atom is on the left-hand side, so the molecule is assigned the L-configuration.

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Answer:

Amplification

Explanation:

Answer:

The population of predatory fishes will change.

The biodiversity of the ecosystem will decrease.

Explanation:

Answer:

The population of predatory fishes will change.

The biodiversity of the ecosystem will decrease.

Explanation:

Im on the edmentum mastery test.

Answer:

It is double displacement reaction

Explanation:

—COOH and —NH₂

Carboxylic Acid and Amino group

-TheUnknownScientist

Answer:   B. Magnesium, strontium, radium, barium

Explanation:

Elements are distributed in groups and periods in a periodic table.

Elements that belong to same groups will show similar chemical properties because they have same number of valence electrons.

Magnesium (Mg) , Strontium (Sr) , Radium (Ra) and Barium (Ba) are elements which belong to Group 2. They have 12, 38, 88 and 56 electrons respectively and contain 2 valence electrons each and need one electron to complete their octet.

The chemical reactivity of elements is governed by the valence electrons present in the element and thus they are alike in physical and chemical properties.

Answer:

Yes it is hard. For some of us. I already gave up, but now hes coming back. Id say sometimes its useless to get his attention if he never even pays attention to you anyways. It sucks because its so hard to get then to notice you for once.

Explanation:

Answer:

28.93 g/mol

Explanation:

This is an extension of Graham's Law of Effusion where [tex]\frac{R1}{R2} = \sqrt{\frac{M2}{M1} } = \frac{t2}{t1}[/tex]

We're only talking about molar mass and time (t) here so we'll just concentrate on [tex]\sqrt{\frac{M2}{M1} } = \frac{t2}{t1}[/tex]. Notice how the molar mass and time are on the same position, recall effusion is when gas escapes from a container through a small hole. The time it takes it to leave depends on the molar mass. If the gas is heavy, like Xe, it would take a longer time (4.83 minutes). If it was light it would leave in less time, that gives us somewhat an idea what our element could be, we know that it's atleast an element before Xenon.

Let's plug everything in and solve for M2. I chose M2 to be the unknown here because it's easier to have it basically as a whole number already.

[tex]\sqrt{\frac{M2}{131} } = \frac{2.29}{4.83}[/tex]

The square root is easier to deal with if you take it out in the first step, so let's remove it by squaring each side by 2, the opposite of square root essentially.

[tex](\sqrt{\frac{M2}{131} } )^2= (\frac{2.29}{4.83})^2[/tex]

[tex]{\frac{M2}{131} } = (0.47)^2[/tex]

[tex]{\frac{M2}{131} } = 0.22[/tex]

M2= 0.22 x 131

M2= 28.93 g/mol