1/4 checkpoint
Time of Trial #1 (s)
2. 15
Time of Trial #2 (s)
Time of Trial #3 (s)
Average time (s)
2.05
2.02
2.07
Use the table to answer the questions.
What is the fastest time trial for the first quarter checkpoint?
seconds
What is the slowest time trial for the first quarter checkpoint?
seconds
What is the range of times measured for this checkpoint?
Answers
Answer:
here's the answers
Explanation:
Answer:
1. 2.02
2. 2.15
3. 0.13
Explanation:
doing it now of EDG :)
Related Questions
promise I will mark u brainiest help me
Answers
Answer:
B. 16, 18, 18
Explanation:
Particle;
³⁴₁₆S²⁻
The number of particles we seek is the protons, neutrons and electrons.
³⁴₁₆S²⁻ is an ion that has gained two electrons from its stable state.
34 is the mass number = number of protons + neutrons
16 is the atomic number = number of protons
Number of protons = 16;
Number of neutrons = mass number - atomic number
= 34 - 16
= 18
Number of electrons; In a neutral atom, the number of protons and electrons are the same.
This atom has gained two more electrons
16 + 2 = 18
Answer;
16, 18 , 18
most inferences about the characteristics of Earth's mantle and core are based on
Answers
Answer:
Properties of seismic waves
Explanation:
Most of the inferences about the characteristics of earth's mantle and core are based on the properties of seismic waves.
Also, some other electromagnetic waves have been used to map the properties of the earth's interior. Seismic waves especially body waves behaves differently in certain medium. P -waves are able to pass through any material medium. S -waves can only pass through solid. They are cut off in fluid medium.How many moles are in 170.3 grams of Carbon?
Please help show me how you do this❤️
Answers
Answer:
There are 14.2 moles of carbon in 170.3 grams of carbon
Explanation:
The mass of one mole of carbon is known as the molar mass of carbon. the unit of molar mass is grams/mole, g/mol.
The molar mass of carbon is 12 grams. This means that for every 12 grams of carbon, one has one mole of carbon.
To determine the number of moles of carbon present in 170.3 grams of carbon, the given mass of carbon, that is 170.3 grams is divided by 12.
The formula to use is: number of moles = mass of substance/molar mass of substance
Number of moles of carbon = 170.3 g / 12 g/mol = 14.2 moles
Therefore, there are 14.2 moles of carbon in 170.3 grams of carbon
If a solid, a liquid, and a gas of a substance are each in separate covered jars, then the amount of kinetic energy of the particles of the substances decreases from solid to liquid to gas.
True
False
Answers
Answer:
false
Explanation:
i had the same thing to do
Which describes a cell after diffusion?
A. The concentration inside the cell is greater than outside
B. The concentration is the same inside and outside the cell
C. The concentration outside the cell is greater than inside
Answers
The concentration inside the cell is greater than outside describes a cell after diffusion. Therefore, the correct option is option A among all the given options.
What is diffusion?Diffusion is regarded a passive mode of cellular transport in biology since it does not require additional energy to occur. It is the primary mode of transport for vital chemicals (such as amino acids) between cells. It is necessary for the production of energy via respiration and photosynthesis.
Some chemicals, referred to as "simple diffusion," are not controlled by the cell's own proteins. membrane. It is found in substances with low molecular weight, such as water, gasses and fat-soluble compounds. The concentration inside the cell is greater than outside describes a cell after diffusion.
Therefore, the correct option is option A.
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If you had to explain to a friend how to balance a chemical equation, what would you say to them?
I attached an image of the game for reference.
Answers
just bring the numbers up and down so there are the same numbers of each element on each side.
on this one i would bring the O2 on the left to 1, bring the right side to 2 so there are 2 oxygens on each side, and because the right side now has 4 hydrogens when you brought up the oxygen, bring the number in front of H2 on the left to 2.
the answer should be 2,1,2
The balanced chemical equation should obey the law of conservation of mass that the number of atoms of each element on both sides should be equal.
2H₂ + O₂ → 2H₂O
What is the balanced chemical equation?The chemical equation of reaction in which the number of atoms of each element is equal on either side of the arrow is known as a balanced chemical equation.
A chemical equation is the expression of a chemical reaction in terms of symbols and coefficients of the substances. A chemical equation contains reactants participating and products forming in the chemical reaction.
The given chemical equation of the formation of water from hydrogen gas and oxygen gas is:
H₂ + O₂ → H₂O
To balance the above equation multiply the hydrogen gas on the reactant side by 2 and multiply the water by 2 on the product side.
2H₂ + O₂ → 2H₂O
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Why do humans feel so attached in relationships? What is the reason?
Answers
Answer:
We attach when we are convinced that we are incapable of healing ourselves or giving ourselves what we really want and need.
Explanation:
Hope you get right
Pls help i will give crown
Answers
Answer: decay
Explanation:
Which correctly lists three characteristics that are used to describe air?
Answers
Answer: density, Omass, radiation, pressure because Radiation pressure is the mechanical pressure exerted upon any surface . Small bodies are more affected than large ones because of their lower mass relative to their surface area formed by the radiation pressure of the young stars reduces the cluster mass enough to allow rapid dispersal.
Explanation: I Hope that helped!!!
mass, pressure, density
When cells or organisms maintain a stable internal state in a changing environment is called?
Answers
Answer:
Homeostasis
Explanation:
how many atoms of oxygen are in a molecule of glucose?
Answers
Answer:
6 oxygen atoms
Explanation:
For example – glucose (C6H12O6), a common sugar molecule, is made up of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.
Al(s) + HCl(aq)→AlCl3(aq) + H2(g) Identify the reactants for this reaction
Answers
Answer:
Al and Hcl
Explanation:
Reactants are the elements, compounds etc before the arrow
Why are enzymes required for living things to function? Reactions take place too slowly at body temperature and must be speeded up. Reactions take place too quickly at body temperature and must be slowed down. Reactions in the body require enzymes to act as reactants. Reactions in the body produce enzymes as byproducts.
Answers
Answer:
Reactions take place too slowly at body temperature and must be speeded up.
Explanation:
Reactions take place too slowly at body temperature and must be speeded up.
An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. Enzymes are required for living things to function because they speed up chemical reactions. Enzymes are protein catalysts.
Reactions take place too slowly at body temperature and must be speeded up.
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Which atoms has larger radius , Be or Ba? Explain your reasoning
Answers
What type of substance is gravel
Answers
Answer:
When substances do not mix thoroughly and evenly (like sand and gravel), the mixture is said to be heterogeneous. A heterogeneous mixture consists of visibly different substances. Another example of a mixture is salt dissolved in water.
Hope it helps!
Which of the following is a non-contact force?
A. Magnetic force
B. Frictional force
C.Force applied by a boatman on the oars
D.Force applied by a table on a book placed on it
again I hate science
Answers
The ovaries in human females and the testes in human males are glands that produce hormones as part of the endocrine system. What function is the endocrine system primarily supporting through these glands and hormones?
A.
breathing
B.
obtaining food
C.
reproduction
D.
removing waste
Answers
Answer:
reproduction
Explanation:
its on study island
A square box with F2 on the left F3 on the top F1 on the right and F4 on the bottom. If F1 is equal to F2 and F4 is greater than F3 which statement is correct? An unbalanced force will move the box up. An unbalanced force will move the box down. Several balanced forces will keep the box stationary. Several balanced forces will keep the box moving towards the right.
Answers
Answer:
B
Explanation:
Which one is NOT part of the brain?
O cerebral cortex
Frontal Lobe
cerebral palsy
hippocampus
Answers
Answer:
The awnser is cerebral palsy
Explanation:
that is a medical condition caused when there is not enough oxygen to the brain at birth
BRAINLIEST PLEASE
Though a needle is several times as dense as water, a small needle can be made to float on the surface of water if placed carefully.
a) What could be the reason?
b) Why does a water drop assume spherical shape?
Plastics played an important role in forest conservation. Substantiate the statement.
Answers
At STP there is 112L of HCl gas in a container. Read the stem and answer Q. No. 1 & 2.
1. What is the amount of gas in the container?
Answers
You have four fixed-volume containers at STP. Container A has 0.5 mol of gas in 11.2L. Container B has 2 mol of gas in 22.4 L. Container C has 1 mol of gas in 22.4L. Container D has 2 Mol gas of gas in 11.2 L. Which of the four containers have equal pressures
A and C
Convert 1.580 hectoliters to deciliters.
liters
Answers
Answer:
1580 decilliters
Explanation:
Answer:
Convert 1.580 hectoliters to deciliters.
1,580
liters
Explanation:
I took the test;)
If you have 547.3 grams of Ni2O, how many molecules would be present?
Answers
Answer: 8.830418848725065
Explanation:
8.830418848725065
5. Name the compound which contain Strontium, Fluorine, and Oxygen. options: Strontium fluorate Strontium fluoride Strontium chlorate Strontium fluorine plz guys help me urgent
Answers
Answer:
This question appear incomplete
Explanation:
This question appear incomplete or has some wrong contents in it. Strontium, fluorine and oxygen do not exist in the same compound. This can even be better confirmed by the options provided. The options provided just two compounds that are rightly named
Strontium fluoride - SrF₂
Strontium Chlorate - SrCl₂
The options strontium fluorate and strontium fluorine are wrong names of the option strontium fluoride. Thus, if the question was asking of a compound that has just strontium and fluorine, the answer would have been strontium fluoride (SrF₂)
promise I will mark u brainiest help me
Answers
The answer is C
Further explanationLewis structures have a central atom and a terminal atom
The central atom is an atom that is bound to 2 or more other atoms, while a terminal atom is bound to 1 other atom
In describing Lewis's structure the steps that can be taken are:
1. Count the number of valence electrons from atoms in a molecule
2. Give each bond with a pair of electrons
3. The remaining electrons are given to the terminal atom so that an octet is reached
4. The remaining electrons that still exist in the central atom
5. If the central atom is not yet octet, free electrons are drawn to the central atom to form double bonds
Nitrogen -N : valence electron : 5 , need 3 electron for stable⇒central atom
Chlorine-Cl : valence electron : 7, need 1 electron for stable⇒terminal atom
So that N will bind 3 Cl atoms to get stability (using electrons together with covalent bonds), so that there is 1 lone pair in N atoms and 3 lone pairs from each Cl atom (a total of 10 lone pairs of electrons)
10. Which statement about cellular respiration in plants and animals is true?
Ⓐ Both plants and animals need light to start cellular respiration.
Ⓑ Both plants and animals release energy from glucose/sugar in cellular respiration.
Ⓒ Both plants and animals take in carbon dioxide in cellular respiration.
Ⓓ Both plants and animals need water in cellular respiration.
Answers
Answer:
Ⓑ Both plants and animals release energy from glucose/sugar in cellular respiration.
Both plants and animals release energy from glucose/sugar in cellular respiration is a statement about cellular respiration in plants and animals is true. Option B is correct.
What is cellular respiration?Name given cellular respiration is a process in which cells convert oxygen into carbon dioxide for respiration which is important for survival.
In cellular respiration, the metabolism of breaking down complex oxygen into energy like ATP or sugar, or glucose can occur and releases some amount of energy too.
Therefore, Option B is correct. Both plants and animals release energy from glucose/sugar in cellular respiration is a statement about cellular respiration in plants and animals is true.
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Lucia is playing with magnetic toy vehicles. She has two identical toy vehicles (purple and pink) that start on opposite sides of a center magnet that cannot move. She moves both vehicles one space closer to the center magnet.
How did the potential energy of the two vehicles change? Did the potential energy of one vehicle change more than the other? Why do you think so?
Answers
Answer:
The potential energy of the two vehicles increased because they were moved against the magnatic forces. The potential energy of the pink car increased more then the potential energy of the purple car because the pink car was closer to the center magnet.
Explanation: I had this same exact question on a quiz and this was my response and I got a 100%
The effects of the movement of the cars closer to the center of the magnet are ;
A) The potential energy of the Two vehicles will be increased
B) The potential energy of one car ( pink car) will change more than purple car due to the distance between the pink car and the center magnet.
Potential energy is the energy contained in a body at rest, The increase in potential energy occur when an object continues to be at rest ( i.e. opposes movement ).
When the cars are moved closer to the center magnet the cars will oppose the motion because their movement is against the magnetic forces that exist between the center magnet and the cars ( i.e. like pole repel while unlike poles attract ). so as Lucia moves the cars closer their potential energies will continually increase ( i.e. the closer the car the higher its potential energy ).
Therefore the pink car been closer to the center magnet will experience a higher change in its potential energy than the purple car.
Hence we can conclude that The effects of the movement of the cars closer to the center of the magnet are ; The potential energy of the Two vehicles will be increased, The potential energy of one car ( pink car) will change more than purple car due to the distance between the pink car and the center magnet.
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A cylinder shaped water tank has a height of 212 ft (6461.76 cm), and is able
to hold 15,000 gallons of water (15,000,000 mL or 15,000,000 cm3). The
volume of a cylinder is expressed by the equation
V = tr^2h
Where V is the volume, r is the radius, and h is the height of the cylinder.
Express the radius (r) in terms of volume (V) and height (h), then determine
the radius of a cylinder water tank (in centimeters) that is filled to capacity.
Answers
Answer:
27.19 cm.
Explanation:
From the question given above, the following data were obtained:
Height (h) of cylinder = 6461.76 cm
Volume (V) of cylinder = 15000000 cm³
P1 (π) = 3.14
Radius (r) =.?
Thus, we can obtain the radius of the cylinder water tank by using the following formula as illustrated below:
V = πr²h
15000000 = 3.14 × r² × 6461.76
15000000 = 3.14 × 6461.76 × r²
Divide both side by 3.14 × 6461.76
r² = 15000000 / (3.14 × 6461.76)
Take the square root of both side
r = √[15000000 / (3.14 × 6461.76)]
r = 27.19 cm
Thus, the radius of the cylinder water tank is 27.19 cm.
Confirmatory test of oxygen meaning?
Answers
Answer:
Oxygen supports combustion so a good method of testing for oxygen is to take a glowing splint and place it in a sample of gas, if it re-ignites the gas is oxygen. This is a simple but effective test for oxygen.
Explanation:
Does temperature impact the ability of water to dissolve things? How do you know?
Answers
Answer:
The temperature of the water affects the amount of dissolving but it also affects the rate of diffusion.
Explanation:
Answer:
Yes, temperature can impact the ability of water to dissolve things, the solubility increases with temperature.
Explanation:
The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.