Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. Which is most likely to result in the greatest amount of error in their scientific experiment?

Answers

Answer 1

Answer: In doing research or experiments, it is necessary that the variables applied on the test subjects are the same. In the problem, the factor that will most likely result in the greatest amount of error will be the plant subjects. Different plants have different growth rates, and their growth can be affected by the many variables such as sunlight, disturbance, location, etc.

Answer 2

Answer:

One student measures liquids for the experiment by holding the flask up at eye level. The other student measures liquids for the experiment while the flask sits on the table.

Explanation:

Just did the test

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The loss of an organism at the bottom of a food chain negatively impacts all organisms in the chain.
suppose that you look into a photometer's eyepiece and the fluorescent disks appear to be equal in intensity. If the distance between the photometer to lamp 1 is 400mm, the distance between the photometer to lamp 2 is 200 mm, and the intensity of lamp 2 is known to be 15 candelas, what is the intensity to lamp 1?
Calculate the displacement for an object traveling at a constant velocity of 32 m/s for 4 s.
As a change of state is occurring, the temperature of the system does not change. a. Trueb. False

Which of the following is a false statement? Select one: A. For an object on the surface of the Earth, the center of gravity and the center of mass are the same point.
B. For a uniform symmetric object, the center of mass is at the center of symmetry.
C. The center of gravity of an object may be thought of as the "balance point."
D. The center of mass of an object must lie within the object.

Answers

Answer:

The false statement is in option 'd': The center of mass of an object must lie within the object.

Explanation:

Center of mass is a theoretical point in a system of particles where the whole mass of the system is assumed to be concentrated.

Mathematically the position vector of center of mass is defined as

$\overrightarrow{r}_(com)=\int \overrightarrow{r}_(i)dm$

where,

$\overrightarrow{r}_(i)$ is the position vector of the mass dm.

As we can see for homogenous symmetrical objects such as a sphere,cube,disc the center of mass is located at the centroid of the shapes itself but in many shapes it is located outside the body also.

Examples of shapes in which center of mass is located outside the body:

1) Horseshoe shaped body.

2) A thin ring.

In many cases we can make shapes of bodies whose center of mass lies outside the body.

Air is warmed and moisten as it moves through both the mouth and nasal passages.a. True
b. False

Answers

Answer: The given statement is true.

Transport of oxygen from the air takes place through respiratory system. Oxygen from air ( that is taken from the atmosphere) enters via a system of tubes, into our lungs and then it is released into the bloodstream ( to serve in various organs) whereas opposite route is followed by CO2 ( carbon dioxide).

In the respiratory tract, the nose is lined by mucosal epithelium that possessed glands ( which secrete thick mucus). Due to this, air is moistened. Beneath the epithelium surface, there lies network of blood vessels that help in warming the nasal cavity and thus the air is warmed.

Answer: True

Explanation: On Edge 2020

In which state of matter do the particles spread apart and fill all the space available to them?a. crystal
b. liquid
c. gas
d. solid

Answers

The correct answer is c) gas.

In gases, in fact, particles are not bound together (and the intermolecular forces between them are negligible) and they are completely free to move. For this reason, when a gas is put in a container, the particles of the gas will move in every possible direction, filling all the space available in the container (for this reason, we also say that gases have no fixed shape).

Which term describe the substance that forms when two or more types of atoms join?A. element
B. compound
C. composite
D. mixture

Answers

Answer:

A. element

Explanation:

A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds.

C i’m pretty sure but don’t take me as your first answer i just need to answer a question to ask one.

jamie is not sure a new medication will work because it has not had a large test group. Is jamie being creative?

Answers

No, he is being skeptical.

In the situation above Jamie doubts because the test was done with a small sample. He thinks the results are uncertain because it is needed a big sample to avoid mistakes and icrease the reliability of the study. So, this leads to scepticism, which means doubt about the truth of something, this is what Jamie does in the situation, this is why he is being skeptical.

no, they're being skeptical.

The expiration date on a product refers to the last date a product should be __________.

Answers

You should not eat foods that have passed their written expiration date

It is the last date that the product should be sitting on the shelf. Or sold

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