Answer:
0.72
Explanation:
if 760=1
550=x
=550÷760= 0.72 in two s.f
The atmospheric pressure of the mountain will be 0.723 atm
What is atmospheric pressure?
Air is everywhere around us at due to which it touches all the surfaces due to which they possess some pressure this exerted pressure is known as atmospheric pressure which can be calculated with this formula.
1 atm = 760 mmHg
1 mmHg = 0.00131 atmosphere
Substituting the value of 1 atm in the given equation,
1mmHg = 0.00131 atmosphere
550 mmHg = 0.00131
= 550 × 0.00131
= 0.723 A T M
It is the total force exerted by the atmosphere as AIR has small molecules and every molecule is possessing some weight as when they are in bulk they form layers these layers.
As we go above on the earth the atmospheric pressure will drops due to the increase in the altitude of the earth due to which there will be less amount of oxygen.
Therefore, the pressure will be 0.723 atm.
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Three models of atomic theory are illustrated in the image. Place them in chronological order.
A)
A, B, C
B)
BAC
CAB
D)
CBA
What is 0.00034 in exponential form
Answer:
3.4 × 10 ^− 4
Explanation:
Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the
10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.
Please answer!! I’ll make brainliest!!
Answer:
greater than 115 N upwards
Explanation:
While doing a lab a student found the density of a piece of pure aluminum to be 2.85 g/cm3 the accepted value for the density of aluminum is 2.70 g/cm3. What was the percent error
Answer:
THE PERCENT ERROR IS 5.55 %
Explanation:
To calculate the percent error, we use the formula:
Percent error = Found value - accepted value / accepted value * 100
Found value = 2.85 g/cm3
Accepted value = 2.70 g/cm3
Solving for the percent error, we have:
Percent error = 2.85 g/cm3 - 2.70 g/cm3 / 2.70 g/cm3 * 100
Percent error = 0.15 / 2.70 * 100
Percent error = 0.05555 * 100
Percent error = 5.55 %
In conclusion, the percent error is 5.55 %
Obtain the valence shell configuration of Al and S from their positions in the periodic table.
Answer:
Al: 3
S: 6
Explanation:
Al is in Group III. This means that it has 3 valence electrons.
S is in Group VI. This means that it has 6 valence electrons.
I hope this helps :)
Example #2: Ajet is traveling at 80 m/s when it starts to approach
a runway. It is able to land and park in 10 s. What is its
acceleration?
Answer:
-8 m/s^2
Explanation:
The formula for acceleration is:
a= v^2 - v^1/t
a= acceleration
v^2- final velocity which in this case would be 0 since the jet comes to a stop.
v^1= original velocity which is 80 m/s.
t=time or 10s
Substitute the letters for the numbers and you get this:
a= 0 - 80/10
0 - 80= -80
-80 divided by 10 is -8.
Hope this helps! :)
Which term represents the movement of molecules from an area of lower concentration to one of higher concentration with carrier molecules, using energy?
Answer:
Active transport
Explanation:
Active transport is defined as the movement of ions or molecules from a region of lower concentration into a region of higher concentration by the use of energy. Two examples of active transport include the uptake of glucose in human intestine and the absorption of mineral ions into plant roots.
Active transport requires energy because it involves the movement of molecules against an existing concentration gradient.
What comes right before the "analyzing the data" step of the scientific
method?
O A. Predicting a theory
O B. Testing the hypothesis
O C. Conducting an experiment
O D. Collecting the data
I need someone to answer this quickly please!!
Answer: d collect the data
Explanation:
Collecting the data and making observations comes right before the "analyzing the data" step of the scientific method. Therefore, option (D) is correct.
What is a scientific theory?The scientific method can be described as an empirical method for acquiring knowledge that has developed in science since at least the 17th century.
The scientific theory includes careful observation, applying what is observed, given that assumptions can distort how one interprets the observation. . A scientific hypothesis is possible to identify a possible outcome of an experiment that conflicts with predictions deduced from the hypothesis.
The scientific theory involves hypotheses, through induction, based on such observations, the testability of hypotheses, experimental and measurement-based statistical, and elimination of the hypotheses based on the experimental findings.
The process in the scientific method includes making hypothetical explanations, and predictions from the hypotheses as logical consequences and then conducting experiments or empirical observations based on those predictions.
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Built from amino acids
carry out most of the life-sustaining functions of the human body
Answer:
proteins carry out most of the life sustaining functions of the human body
A chemist adds two substances together in a beaker. When he combines the substances, a solid substance is formed. He filters the solid substance and measures its mass on an electronic balance. When the chemist measures the mass of the substance, he is A. collecting relevant data. B. devising a hypothesis. C. making a prediction. D. drawing a conclusion.
Answer:
collecting relevant data
Explanation:
got this answer from another website ;)
What are the number of protons, neutrons, and electrons in an atom of Tellurium- 129?
Answer:
Number of protons = 52, Number of electrons = 52, Number of neutrons = 76
Explanation:
How are the atoms
or molecules
arranged in solid?
Answer:
Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Hope this helped :)
What do you think the scientific question is for the
boiling water experiment
Answer:
Scientific Question: ... I will boil water and add a substance like salt to see if the boiling point increases.
What is The ratio of atoms in HCI is
Answer:
Each molecule of HCl is composed of a one-to-one ratio of hydrogen and chlorine.
Explanation:
At room temperature, HCl is a colorless, poisonous gas. Dissolve it in water, and, voilà, you have hydrochloric acid. For the record, acids are substances that release hydrogen ions in water. The more hydrogen ions an acid releases in water, the stronger the acid (see "What is an ion?" below). If you concluded from the above discussion that HCl releases many hydrogen ions in water, you are right!
The ratio of atoms in HCl is
1:1The ratio of atoms in hydrogen chloride shortened as HCl is 1:1. This is because there is only one atom of hydrogen that is reacted with another atom of chlorine. A ratio indicates the relative sizes of two or more quantities.
When given another compound like H₂ SO₄, we can describe the elements as being in the ratio of 2:1:4. Thus, we can see the relative quantities of the individual elements in the given compound.
In conclusion, the ratio of atoms in HCl is 1:1.
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An airplane travels 2100 km at 1000km/hE. It encounters a wind and slows to 800 km/h E for the next 1300 km. What is the average velocity of the airplane for this trip?
Answer:
The average velocity of the airplane for this trip is 1684.21 km/h
Explanation:
Average velocity is the rate of change of displacement with time. That is,
Average velocity = [tex]\frac{Displacement }{Change in time}[/tex] = Δx / Δt = [tex]\frac{x2 - x1}{t2 - t1}[/tex]
Now we will calculate the time taken by the airplane for the first motion before it encounters a wind.
From,
Velocity = [tex]\frac{Distance traveled}{Time taken}[/tex]
Time = [tex]\frac{Distance traveled}{Velocity}[/tex]
Therefore, Time = [tex]\frac{2100km }{1000km/h}[/tex]
Time = 2.1h
This is the time taken before the airplane encounters a wind.
Hence, t1 = 2.1h
Now, For the time taken by the airplane when it encounters a wind
Also from,
Velocity = [tex]\frac{Distance traveled}{Time taken}[/tex]
Time = [tex]\frac{Distance traveled}{Velocity}[/tex]
Therefore, Time = [tex]\frac{1300km }{800km/h}[/tex]
Time = 1.625h
Hence, t2 = 1.625h
Now, to calculate the average velocity
Average velocity = [tex]\frac{x2 - x1}{t2 - t1}[/tex]
x1= 2100, x2= 1300, t1= 2.1h and t2= 1.625h
Hence, Average velocity = [tex]\frac{1300 - 2100}{1.625 - 2.1}[/tex]
Average velocity = 1684.21 km/h
what are the fundamental particles of an atom
Protons, neutrons, and electrons are the fundamental subatomic particles.
In hot sunlight, dry sand heats up more than ocean water. What principles of heat and thermal energy does this difference demonstrate?
Answer:
1) Heat capacity
2) Thermal Conductivity
3) Heat reflection
Explanation:
The heat capacity of a body is the heat required to raise the temperature of the given mass of the body by 1° C.
The heat capacity = Mass × Specific heat capacity
Given that the mass of the ocean, which covers 70% of the Earth's surface has a much larger mass than a given unit of sand and that the specific heat capacity for the water (4,200 J/(kg·°C)) is much more than that of the sand (800 J/(kg·°C)), the heat required to raise the temperature of the mass of sand by 1°C is much less than the heat required to raise the temperature of the temperature of the ocean by 1°C
Therefore, the sand will have a higher temperature than the ocean when exposed to the same Sunlight
2) The ocean has a thermal conductivity of 0.5 W/(m·°C) the thermal conductivity of sand is 2.05 W/(m·°C), therefore, sand takes heat from the Sun faster than the ocean which also increases its temperature
3) The albedo, of the ocean is more than that of the sand so the ocean absorbs more of the Sun's heat than the sand but very little of the heat is conducted.
if 1/4 cups are in 1 serving jow many servings are in 4 cups
Answer:
One serving is 1/4 cup therefore 1 cup would be 4 servings. Since we have 9 cups we would then multiply 9 x 4 and the answer would be 36 servings. You have a ratio of cups to serving, so 1/4 cup : 1 serving, or .
Explanation:
which physical property of the alkali metal group decreases down the group
Answer:
Melting and boiling point
Explanation:
For all group 1 elements, the melting and boiling point of the various members of the group decreases down the group. Hence, as the elements become heavier, they tend to have lower melting and boiling points.
Thus in moving from lithium to francium, there is a steady decrease in the melting and boiling points of elements down the group.
Explain that the giant ionic lattices are held together by the attraction between oppositely charged ions.
Answer:
hope it helps!!!!!!!!!!!!!!!!!!!!!
Explanation:
An ionic compound is made up of charged particles, called ions. It has a giant lattice structure with strong electrostatic forces of attraction.
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Convert 205 L to ul.
Answer: 205000000 microliter
Hope this helps!
Answer:
2.05 x 10⁸ uL
205000000 uL
Explanation:
Step 1: Find the conversion
1 liter (L) = 1 x 10⁶ microliters (uL)
Step 2: Set up dimensional analysis
[tex]205 L(\frac{1(10)^6uL}{1L} )[/tex]
Step 3: Multiply and cancel out units
Liters and Liter cancel out.
We are left with uL
205(1 x 10⁶) = 2.05 x 10⁸ uL or 205000000 uL
Question 7
Which of the following discoveries led to the development of the quantum mechanical model?
A electrons occupied different energy levels around the nucleus
B
atoms of gases combined to form compounds in whole-number ratios
Cmost alpha particles passed through gold foil without hitting matter
D cathode rays could be bent by a magnetic field
Identify the number of significant figures in each of these measurements of an object length: a. 76.48 cm b. 76.47 cm c. 76.59 cm
All of the measurements have 4
The number of significant figures in each of these measurements of an object's length: a. 4 b. 4 c. 4.
What are significant figures?The significant figures are the digits or numbers from zero to nine which are used to signify and specify the reporting of the measurement having uncertain digits.
Starting zero is not significant, decimal is not significant, ending zero after the decimal is significant and ending zero before and without decimal is not significant.
Therefore, a. 76.48 cm = 4 b. 76.47 cm c. = 4 76.59 cm = 4 are the number of significant figures in each of these measurements of an object's length.
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Which of the following questions cannot be answered by science? How does color of light affect the mating behaviors of bees? How does soil pH affect the productivity of fruit trees? How does temperature affect the amount of oxygen able to dissolve in water? How do contrasting colors affect the quality of a painting?
Answer: How do contrasting colors affect the quality of a painting
Answer:
The answer is D.
Explanation:
I just took the test. :)
Water flows over Niagara Falls at the average rate of 2,400,000 kg/s, and the average height of the falls is about 50 m. Knowing that the gravitational potential energy of falling water per second = mass (kg) × height (m) × gravity (9.8 m/s2), what is the power of Niagara Falls? How many 15 W LED light bulbs could it power?
Answer:
The power of Niagara falls is 1,176 Mega Watts
The number of 15 Watt bulbs it can power is 8,400,000 bulbs
Explanation:
The rate at which the water falls given as the mass flow rate = 2,400,000 kg/s
The height from which the water falls = 50 m
The gravitational potential energy (potential energy PE.) of falling water = Mass (kg) × height (m) × gravity (9.8 m/s²)
The mass of water that falls per second = 2,400,000 kg
PE. = 2,400,000 kg × 50 m × 9.8 m/s² = 1,176,000,000 Joules
The power = The rate at which the energy is generated = The amount in kg of water that fall from the height per second × The height × Acceleration due to gravity
The power = 2,400,000 kg/s × 50 m × 9.8 m/s² = 1,176,000,000 Watts
The power of Niagara falls = 1,176,000,000 Watts = 1,176 Mega Watts
The number of 15 Watt bulbs it can power = 1,176,000,000/15 = 78,400,000 bulbs
The number of 15 Watt bulbs it can power = 8,400,000 bulbs.
Explain why the Bohr model was insufficient and how the quantum model explained this deficiency. How is the electron viewed differently in each model
Answer and Explanation:
Bohr's model of the atom defined the electron as a particle that orbits around the nucleus in only certain orbital levels. As a result, it couldn't readily give account of the energy levels of larger elements with high atomic number.
The quantum model of the atom however, approaches the electron in an atom as not just a particle but a wave, with its distinct quantum number per energy level. It can therefore give the position and speed of an electron simultaneously at any energy level.
I hope this explanation is sufficient.
3. Dorji was provided with four colourless solutions. He was asked to
identify the type of solution using universal indicator. Dorji's finding is
recorded in Table 8.5. Use the information from Table 8.5 to answer the
questions that follow.
Table 8.5.
Solution
COA
Colour change of universal indicator
Red
Blue
Purple
Yellow
en
i. What type of solutions are solution A and solution C?
ii. Which solutions do you think are:
a. acidic in nature?
b. basic in nature?
iii. What will happen if equal volume of solution B and solution D are
mixed?
Answer:
First, we can test Solution 1. We know that Sodium Hydroxide is a strong base. If we test acids on blue litmus paper, they will turn red. If we test bases on red litmus paper, they will turn blue. So, you can test all the of the solutions- water, sodium hydroxide and hydrochloric acid with blue and red litmus paper. HCl, Hydrochloric acid is an acid, so it will turn blue litmus paper red. It will not turn red litmus blue. The acids will turn blue litmus paper red. The bases will turn red litmus paper blue. Only water is a neutral liquid, which will not turn blue litmus paper red or red litmus paper blue. It will not change the colour of it. Thus, if you test all the solutions with blue and red litmus paper, you will know which solution is water. Water is the only one which is neutral. It is the only solution which cannot change the colour of any litmus paper. Thus, you can identify it very easily.
Justin B. Believes that the temperature lowering during the fall months is what causes the color of the leaves to change. He set up an experiment wherein he placed some plants in 80 degrees rooms and some in 60 degree rooms. He observed the color of the leaves for a total of 1 month. At the end of the month Justin observed that 3/4 of the plants in the 60 degree temperature had begun to change colors and only 1/4 of the plants in the 80 degree temperature began to change colors.
Answer:
This question is incomplete, the remaining part of the question is:
What is the control group, independent variable and dependent variable?
Control group: Plants placed in 80 degree rooms
Independent variable: Change in temperature
Dependent variable: Change in color of leaves
Explanation:
The independent variable in a scientific experiment is the variable that the experimenter controls or manipulates in order to bring about a change in the dependent variable. In this experiment, the variable manipulated by Justin B is the TEMPERATURE CHANGE.
On the other hand, a variable is said to be dependent if it is the variable that responds to a change made to the independent variable or rather it is the outcome. In this experiment, Justin B is trying to see the outcome on the color change in leaves when exposed to a low temperature, hence, COLOR CHANGE IN LEAVES is the dependent variable.
Control group of an experiment is the group that receives no experimental treatment. It is the group the experimenter considers normal and hence is comparing with his experimental group. In this experiment, Justin B believes the leaves change color in a low temperature, hence, he placed some plants in a lower temperature (60 degree) in order to compare them with when the plants are placed in a higher temperature (80 degree). As far as this experiment is concerned, the plants placed in 80 degrees temperature are believed by Justin B not to undergo color change, hence, they are the CONTROL GROUP while the group he placed in 60 degrees temperature are what he is interested in, making them the EXPERIMENTAL GROUP
Which has a larger density a large brick or a small brick? why?
Answer:
15.2
Explanation:
the chemical reaction in chemistry libretto texts.
Answer:
Neither
Explanation:
Density is independent of size. Basically, the density of an object isn't determined by it's size.
If two objects are made of the same exact material, they will have the same exact density, regardless of the size.
So, the large brick and the small brick will have the same density, as long as they are made from the same type of brick material.
13. To refine aluminum from its ore, aluminum oxide is electrolyzed to form aluminum and oxygen. At which electrode does oxygen form?
O A. Both the anode and the cathode
OB. Anode
O C. Cathode
OD. Neither electrode
Answer:
I think B
Explanation:
Answer:
Anode
Explanation: