A. Terminal velocity is when the force of gravity is equal to air resistance.
B. Heavier objects take more time to reach terminal velocity.
C. The greater the number of filters, the smaller the terminal velocity
D. Heavier objects fall faster than lighter objects.
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Terminal velocity is the maximum speed achieved by an object freely falling through a gas or liquid. At terminal velocity, the forces acting on the object are balanced so it is no longer accelerating. Terminal velocity is achieved when the force of gravity is equal to air resistance. From the data table you provided, we can see that as the mass of the coffee filters increases, so does the terminal velocity. This means that heavier objects fall faster than lighter objects. Therefore, conclusion D is supported by the data in the table.
Therefore, the Correct Answer is D.
Which of the following is the atomic number of an atom that has 12 protons and 12 neutrons?
A. 24
B. 1
C. 12
D. 144
The Correct Answer is C.The atomic number of an atom is defined as the number of protons in its nucleus. Protons are positively charged particles that make up part of the atomic mass, along with neutrons, which have no charge. The number of neutrons can vary for atoms of the same element, resulting in different isotopes. However, the number of protons is always constant for a given element. Therefore, to find the atomic number of an atom that has 12 protons and 12 neutrons, we only need to look at the number of protons.
Which of the following is the process in which an ovarian follicle matures and releases a reproductive egg?
A. Oogenesis
B. Ovulation
C. Menstruation
D. Fertilization
The Correct Answer is B.The process in which an ovarian follicle matures and releases a reproductive egg is called ovulation. Ovulation is one of the phases of the menstrual cycle, which also includes follicular phase, luteal phase and menstruation
| #OF FILTERS | MASS (g) |
TERMINAL VELOCITY (m/s) |
|---|---|---|
| 1 | 1.01 | 1.74 |
| 2 | 1.99 | 2.48 |
| 3 | 3.02 | 3.04 |
| 4 | 4.0 | 3.50 |
| 5 | 5.01 | 3.80 |
A group of students perform an experiment to test terminal velocity, which is the greatest speed obtained by a falling object. The students dropped different numbers of coffee filters and measured the resulting terminal velocity. Which of the following conclusions is supported by the data in the following data table?
A. Terminal velocity is when the force of gravity is equal to air resistance.
B. Heavier objects take more time to reach terminal velocity.
C. The greater the number of filters, the smaller the terminal velocity
D. Heavier objects fall faster than lighter objects.
The Correct Answer is D.Terminal velocity is the maximum speed achieved by an object freely falling through a gas or liquid. At terminal velocity, the forces acting on the object are balanced so it is no longer accelerating. Terminal velocity is achieved when the force of gravity is equal to air resistance. From the data table you provided, we can see that as the mass of the coffee filters increases, so does the terminal velocity. This means that heavier objects fall faster than lighter objects. Therefore, conclusion D is supported by the data in the table.
Which of the following reasons explains why it is important for new scientific findings to be published?
A. Publishing findings will help scientists become more biased.
B. This prevents other scientists from performing similar tests.
C. Scientists will get paid if their findings are published.
D. Other scientists can validate or disprove the findings.
The Correct Answer is D.One of the essential aspects of scientific inquiry is the communication of results to peers and the public. Publishing new scientific findings allows other scientists to review, replicate, or challenge the methods and conclusions of a study. This way, science can advance by building on previous knowledge and correcting any errors or inconsistencies.
Which of the following organic molecules contain both an amine and carboxyl group?
A. Lipids
B. Proteins
C. Chitin
D. Cellulose
The Correct Answer is B.An amine group is a nitrogen atom bonded to three hydrogen atoms, and a carboxyl group is a carbon atom double-bonded to an oxygen atom and single-bonded to a hydroxyl group. These groups are important for the formation of amino acids, which are the building blocks of proteins.
Testosterone is categorized as which of the following types of hormones?
A. Progestin
B. Androgen
C. Aldosterone
D. Estrogen
The Correct Answer is B.Testosterone is a hormone that belongs to the class of androgens, which are responsible for the development and maintenance of male characteristics. Androgens are synthesized from cholesterol and can be converted into other types of hormones, such as estrogens and progestins. Aldosterone is a different type of hormone that regulates the balance of salt and water in the body.
Which of the following best describes the result of using a catalyst in a chemical reaction?
A. The reaction is completed in a shorter amount of time.
B. The yield of product is increased.
C. A greater amount of heat energy is released by the reaction.
D. A more desirable product is often formed.
The Correct Answer is A.A catalyst is a substance that lowers the activation energy of a chemical reaction, which means that it allows the reaction to proceed faster without being consumed or changed itself. A catalyst does not affect the equilibrium of a reaction, so it does not change the amount or the type of product that is formed.
Nitrogen gas is an extremely stable molecule because its structure contains which of the following?
A. lonic bonds
B. Triple covalent bonds
C. Resonance bonds
D. Hydrogen bonds
The Correct Answer is B.Triple covalent bonds. Nitrogen gas consists of two nitrogen atoms that share three pairs of electrons, forming a triple bond. This bond is very strong and requires a lot of energy to break. Ionic bonds, resonance bonds, and hydrogen bonds are weaker types of bonds that do not occur in nitrogen gas.
In the following data table of an experiment carried out at 4° C (39.2° F) over 4 hours, which of the following options represents the dependent variable?
|
Solution in bag |
Solution outside bag |
Bag mass change (g) |
|
water |
water
|
-0.2 |
|
20% sucrose
|
water
|
+2.4
|
|
40% sucrose
|
water
|
+4.3
|
|
60% sucrose
|
water
|
+5.8
|
A. Duration
B. Temperature
C. Sucrose concentrations
D. Bag mass change
The Correct Answer is D.The dependent variable is the variable that is measured or observed in an experiment. It is the variable that changes as a result of the independent variable, which is the variable that is manipulated or controlled by the experimenter. In this case, the dependent variable is the bag mass change, because it depends on the sucrose concentrations in the bag and outside the bag. The other variables, such as duration, temperature, and sucrose concentrations, are independent variables that are set by the experimenter.
Which of the following is the approximate threshold value for mammalian neurons?
A. +35 mV
B. -55 mV
C. 0 mV
D. -80 mV
The Correct Answer is B.The approximate threshold value for mammalian neurons is -55mV.