Answer:
A. humans going underwater and exhaling
Explanation:
Dissolved oxygen is the oxygen content that can be found in a water body. Oxygen is a gaseous component that dissolves readily in water, however, oxygen dissolves in water via the following sources including diffusion from the atmosphere, aeration as water moves over rocks and debris, and from wind and wave, photosynthesis of aquatic plants.
Humans like every other living organism will undergo cellular respiration and release CO2 (carbon dioxide gas) as a a product during exhalation. Hence, humans going underwater and exhaling cannot be a source of dissolved oxygen.
If D is neutral liquid, which of the following is C
heat
MgCO3
(A) + (B)
C с
MgCl2 + (D)
Answer:
Cl2
Explanation:
Bcs in product there is chorine
How could you improve an item that you use
regularly? *
Explanation:
by adding some technique ex. to make the item easier for use, more convenient, more benefits than regular items.
Kendall has an empty graduated cylinder with markings and an identical graduated cylinder partway filled with water. She also has a balance and a marble
Answer:
She can measure the volume and mass of the marble, the volume and mass of the water, and the mass of the graduated cylinder.
Explanation:
Graduated cylinders are used to measure volume, hence she can be able to measure the volume of the marble from the volume of water displaced. The measuring cylinder is also used to measure the volume of the water. The balance is used to measure the mass of the water and mass of the marble.
If you have two substances with the same volume, but different masses,
which one is more dense?
Answer:the one with more mass
Explanation: the more mass the more dense
which type of electronic radiation has a lower frequency than infrared radiation? A gamma rays B microwave C visible light D x-ray
Answer:
A, gamma rays
Explanation:
Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
A social movement dedicated to protecting the natural world and people from undesirable changes caused by human activity. *
A.Environmental Science
B.Environmentalism
I think its b accauly no im positive its b
what will be the colour of Naoh solution when added to phenolphthalein
Explanation:
determine the level of your emotional maturity.
CAN YOU KEEP YOUR CALMNESS IN STRESSFUL SITUATION?
list three examples each of objects that are comonly measured by mass, by volume, and by length
Answer:
Explanation:
Milk, flour, gold
1. What is the mitochondra in a cell? What is its primary funtion?
Answer:
Its the powerhouse of the cell.
Explanation:
It breaks down food into energy.
I hope this helps. :3
Nitrogen has one more valence electron than carbon has. What can you infer about nitrogen's location on the periodic table. 5 points Nitrogen is in the first group. Nitrogen and carbon are in different groups. Nitrogen is directly above carbon but within the same group. Nitrogen is directly below carbon but within the same group.
Answer:
nitrogen and carbon are in different groups
Explanation:
the group number determines the number of valence electrons the element has. since nitrogen and carbon have different numbers, they cannot be in the same group.
if you have something with a mass of 45g and a volume of 5mL, what is that object’s density? How do you determine its density?
Answer:
use the Density Calculator uses the formula , or density is equal to mass divided by volumeThe calculator can use any two of the values to calculate the third. Density is defined as mass per unit volume.
Explanation:
During a chemical reaction...
A) atoms are destroyed, but new atoms are created to keep the mass the same.
B) atoms are rearranged, and new matter is formed.
C) atoms are destroyed, and this explains how the universe is always changing.
D) atoms are rearranged, but no new matter is formed.
Answer:
the answer is going to be D
Explanation:
the make new product but do not change
An object has a mass of 20 g and a volume of 100 mL. What is the density of the object?
Answer:
The answer is
0.2 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]Density = \frac{mass}{volume} [/tex]From the question
mass of object = 20 g
volume = 100 mL
Substitute the values into the above formula and solve
That's
[tex]Density = \frac{20}{100} \\ = \frac{2}{10} \\ = \frac{1}{5} [/tex]
We have the final answer as
0.2 g/mLHope this helps you
find the mass of 5ML volume of water if the density of the water is 1g/mL
Answer:
If 5 mL of water is displaced when 10 g of solid is placed in the water, then it is a relatively good assumption that the density of the solid is 2 g/mL
.
Explanation:
1) 5,730 s to ks
2) 22,000 mg to cg
3) 0.077 ks to ms
PLEASE BE CAREFUL AND PAY ATTENTION TO COMMAS AND DECIMALS!
Answer:
1) 5.73 ks
2) 2200 cg
3) 77000 ms
Explanation:
Atoms can be neutral with different numbers of protons and electrons True or False
Answer:
False
Explanation:
ok?
1.207 x 107
Scientific notation
Answer:
feauurrjfjf iiii ammm soo confused
Explanation:
Cycling enthusiasts often prefer bicycles made with titanium frames. Titanium is resistant to corrosion and fatigue, has a significantly lower density than steel, and seems to have a natural shock-absorbing ability. Suppose a high-quality titanium frame contains 1300 g of titanium. How many moles of titanium does this frame contain? (A calculator can be used) A) 27.16 moles B) 62.23 moles C) 1.6 x 1026 moles D) 27 moles
Answer:
A) 27.16 moles
Explanation:
According to the question, Titanium element (Ti) is the major constituent of a frame used to make a bicycle.
The titanium-frame contains 1300grams of titanium. Thus, the amount of moles in the frame can be calculated using the formula:
Number of moles = mass ÷ molar mass
Molecular weight or molar mass of Titanium= 47.87g/mol
Hence;
Number of moles= 1300/47.87
No. of moles= 27.15688
No. of moles= 27.16 moles
Note that, the less precise measurement will be used. 27.16 (4s.f) is less precise than 27 (2s.f)
What is the chemical formula for barium and chlorine?
Answer:
Barium chloride is an inorganic compound with the formula BaCl2.
chlorine Cl-
Answer:
The chemical formula is BaCl2
Which of the following best describes Galileo’s conclusion about how weight affects gravity? A No matter the weight of an object, gravity remains constant. B Heavier objects will increase the value of gravity. C Objects that are the same weight as a cannonball have zero gravity. D With any two similar sized objects, one will have double the gravity of the other.
Answer: a
Explanation:
according to the passage: “galileo concluded that gravity is a constant based on the experiment result: weight doesn’t change the speed at which object fall
Galileo’s conclusion about how weight affects gravity that heavier objects will increase the value of gravity. option B is correct.
What is gravity?Gravity is a force of attraction that holds the planets in orbit around the sun and the moon in orbit around Earth. Gravity not only pulls on mass of any object but also on light from any coming source.
And according to the Newton sir law also if the mass of any object is more or double then the gravity will also become double from the expected gravity.
Therefore, Galileo’s conclusion about how weight affects gravity that heavier objects will increase the value of gravity. option B is correct.
Learn more about gravity, here:
https://brainly.com/question/4014727
#SPJ2
What is collide? Help pls
Answer:hit with force when moving.
Explanation:
Example: The two cars collided with an ear-splitting crash. to clash; conflict: Their views on the matter collided.
Answer: colliding is when two things meet eachother at a certain point and hit
Explanation: Trust me.. (:
-migimigi
Observation: I am in the lab timing how long it takes to boil 100 mL of water in a beaker over a Bunsen burner. I observe it takes 5:15 mins to boil the water. I want to get the most accurate answer possible so I repeat the test again making sure everything is the same. This time it takes 7:05 mins to boil the water. I think this is unusual so I repeat the experiment a third time and it takes 5:20 mins. What could we infer about the differences in the times observed?
Answer:
The likely causes inferred about the differences in times observed are;
1) Slight increase of the vapor pressure of the air immediately above the water surface due to the presence of a lid
2) Variation of heat input due to wind draft that alters the focus of the flame
3) The introduction of impurities into the water from the water source or through the sourcing mediums or containers or during handling of the water
Explanation:
The factors that affect the boiling point of water includes;
1) The amount of heat supplied, to the water
2) Vapor pressure above the water surface
3) Presence of impurities in the water
Therefore, the most likely causes for the difference in the times observed for the water to boil in the order of increasing probability of cause and effect are therefore;
1) Slight increase of the vapor pressure of the air immediately above the water surface due to the presence of a lid
2) Variation of heat input due to wind draft that alters the focus of the flame
3) The introduction of impurities into the water from the water source or through the sourcing mediums or containers or during handling of the water.
We can infer that the observed time differences may be the result of impurities present in the water.
We can achieve this result because:
The water boils when it reaches a temperature of 100ºC.In this case, if the student shown in the question above used the same amount of water, in the same beaker, and the same heating intensity, all experiments should have taken the same amount of time to boil the water.However, the boiling temperature of water (100°C) can be changed if the water contains any kind of impurity. In this case, we can infer that the second experiment of the student contained impure water, which made the boiling temperature higher.
More information:
https://brainly.com/question/16122572?referrer=searchResults
A balloon (approximate as a sphere) is inflated such that its
radius is 7.00 cm. What is the volume of air inside the balloon
in ML? (Volume of a sphere = Truse 3.14 for TT)
mL
Answer: 1436 mL
Explanation: 4/3 • 3.14 • 7^3 <— calculate
Volume is the measurement of the shapes that are given by the dimensions like the radius. A balloon in the shape of a sphere with a radius of 7.00 cm is 1436.76 cm³.
What is the volume of the sphere?The volume is the quantitative measure of the object or substance with respect to its radius or diameter which is given in milliliters, liters, or cubic centimeters.
The volume has no definitive shape but acquires that of the container like the spherical shape of the balloon.
The formula to calculate the volume of a sphere is,
[tex]\rm V = \dfrac{4}{3} \pi r ^{3}[/tex]
Given,
Radius (r) of the balloon = 7.00 cm
π = 3.14
Substituting values of r in the above formula as:
[tex]\begin{aligned} \rm V &= \dfrac{4}{3} \pi \rm r ^{3}\\\\\rm V &= \dfrac{4}{3} (3.14) (7^{3})\\\\\rm V &= 1436.76 \rm \;cm^{3}\end{aligned}[/tex]
Therefore, a balloon with a 7.0 cm radius has a volume of 1436.76 cm³.
Learn more about the volume here:
https://brainly.com/question/16694275
#SPJ2
What forces makes a fan stop spinning?
Answer:
And since there is a frictional force acting upon the rotating blades of the fan due to the air, the speed of the fan blades ceases and ultimately comes to halt. Thus here, air friction is the external force which makes the fan blades to stop after sometime, otherwise it would have never stopped rotating :P.
Explanation:
Answer: air friction
Explanation:
9. How long in minutes does it take sunlight to reach earth if the sun is 5,000,000 km from earth? (speed of light = 300,000 km/s)
Answer:
Sunlight travels at the speed of light. Photons emitted from the surface of the Sun need to travel across the vacuum of space to reach our eyes.
The short answer is that it takes sunlight an average of 8 minutes and 20 seconds to travel from the Sun to the Earth.
If the Sun suddenly disappeared from the Universe (not that this could actually happen, don’t panic), it would take a little more than 8 minutes before you realized it was time to put on a sweater.
Explanation:
That is what I would put
according to the graph, how many mice will be born in week 5 if the trend continues?
TRUE OR FALSE
Friction is a force that acts in the same direction as the that of the object in motion
Answer:
False.
Explanation:
Friction is a resisting force that acts on a body to prevent its motion. Friction force acts opposite to the direction of motion.
Practice 1: Choose the statement that best reflects curiosity.
A) It is important to always ask questions and want to find answers not just in science but in all activities.
B) Curiosity is not important to science, only facts.
C) It is important to learn as much about a topic before conducting an experiment.
D) Curiosity is based on knowledge. Only scientists have curiosity.
Answer:
The correct answer is - option A. It is important to always ask questions and want to find answers not just in science but in all activities.
Explanation:
Curiosity is the desire to learn about things and natural phenomenon that what is the reason behind the particular reaction or particular phenomenon and any type of knowledge to understand things better.
It is an ability that is not confined to the scientific community only but found in most of the humans and in all the activities. It helps in understanding the world and things better.
Thus, the correct answer is - option A.
What is the Net Force?
2N >
4N -
SN
Submit your data table and answer these questions in the essay box below.
1. Which ruler has the greatest precision?
2. Compare your estimates with the actual measurements. How close were your estimates?
I'm not sure, i had this same question, and it doesn't make any logical sense because
A centimeter is a centimeter but in the video apparently not... for example in the video it showed the notebook as 40cm for one and the next one shows it as 14.4 cm it stayed as cm both times the size of the ruler should not change that one ruler was by 10cm the other was by 1 cm and it showed 2 completely different numbers
so therefore it doesn't make any logical sense
here was my measurements from the little video it had
try getting ahold of the teacher or whoever gave you the question its all you really can do...
hope this helped even tho it probably didn't
