Answer:
C. The speed limit.
Explanation:
If the car was the point of reference then he would be looking at his car not the speed the car is going. If the ground was the reference then he would be looking at the ground and not how fast the car is going. So that means that the officer is determining how fast the car is going compared to the speed limit.
Which is an example of making a quantitative observation?
a. measuring the mass of metal used in a reaction
b. recording the color of a solid formed in a reaction
c. describing a liquid as having a slippery feel
d. rating an odor on how nice it smells
Answer:
A) measuring mass of metal used in a reaction
Explanation:
Quantitive observations is data involving statistics and numerical values.
How does a balanced equation satisfy the Law of Conservation of Mass
Answer: I think d
Explanation:
Anything that has mass and takes up space is called *
1 point
matter
energy
heterogeneous
mixture
What holds atoms together in a molecule? *
1 point
gravity
physical bonds
chemical bonds
density
Answer:
the answer is Matter for the first one the second one is a chemical bond
Explanation:
:)
Answer is matter? Hope that helps,
Which of the following cannot be determined by an H-R Diagram?
Brightness (Luminosity)
Temperature
Color
Location
in which of the following are photosynthesis and resperation alike
Answer:
i need a picture or more info to understand
Answer: photosynthesis puts together a glucose molecule, but cellular respiration takes it apart and uses its energy.
What is the difference between a chemical formula and a chemical equation?
a chemical formula is the combination of atomic symbol that designer a particle chemical compound aur a substance with two or more different element. A chemical equation show one or more chemical compound( reactance) being convert into different chemicals space is called product
Explanation:
in your opinion if the answer is correct mark me as brain list
What is the area called in which the electrons are found ?
Answer:
orbitals
Explanation:
Convert 1 meter into millimeters.
Group of answer choices
1,000 millimeters
10 millimeters
100 millimeters
1 millimeter
Answer:
1,000 millimeters
Explanation:
which of the following is a compound?
Separating a compound like H2O by electrolytes is that a chemical or physical change?
Answer:
pretty sure that would physical
what is the role identification of work performance
Explanation:
It is one of the most important factors that encourage workers to put forth great efforts and work more efficiently.
Quadrilateral ABCD is shown on the coordinate grid below.
Which rule best describes the transformation that was used to create quadrilateral A'B'C'D'?
A. Quadrilateral ABCD was dilated by a scale factor of –1 to create quadrilateral A'B'C'D'.
B. Quadrilateral ABCD was dilated by a scale factor of 2 to create quadrilateral A'B'C'D'.
C. Quadrilateral ABCD was dilated by a scale factor of 0.5 to create quadrilateral A'B'C'D'.
D. Quadrilateral ABCD was dilated by a scale factor of 0.25 to create quadrilateral A'B'C'D'.
Answer:
The answer is B
Explanation:
A molecular compound is?
Answer:
Molecular compounds are inorganic compounds that take the form of discrete molecules. Examples include such familiar substances as water (H2O) and carbon dioxide (CO2). Rather than forming ions, the atoms of a molecule share their electrons in such a way that a bond forms between pairs of atoms. ...
Explanation:
ym
which of these are broken down during chemical,but not physical,changes
Which of these what?
This isn't clear, can you put the answer choice or something?
The half-life of tritium (H-3) is 12.3 years. If 48.0mg of tritium is released from a nuclear power plant during the course of a mishap, what mass of the nuclide will remain after 49.2 years?
Answer:
The amount left after 49.2 years is 3mg.
Explanation:
Given data:
Half life of tritium = 12.3 years
Total mass pf tritium = 48.0 mg
Mass remain after 49.2 years = ?
Solution:
First of all we will calculate the number of half lives.
Number of half lives = T elapsed/ half life
Number of half lives = 49.2 years /12.3 years
Number of half lives = 4
Now we will calculate the amount left after 49.2 years.
At time zero 48.0 mg
At first half life = 48.0mg/2 = 24 mg
At second half life = 24mg/2 = 12 mg
At 3rd half life = 12 mg/2 = 6 mg
At 4th half life = 6mg/2 = 3mg
The amount left after 49.2 years is 3mg.
What do these two changes have in common?
water evaporating from a lake
sediment settling to the bottom of a muddy puddle
Select all that apply.
Both are only physical changes.
Both are chemical changes.
Both are caused by heating.
Both are caused by cooling.
Answer:
Both are caused by heating. Both are Chemical changes.
Explanation:
Water evaporates from the Sun's heat and is transformed into a gas.
Sediment is the particles of an object. When heat hits it, it starts breaking up, or in dry cases, heating and cracking.
The study of chemicals is called chemistry.
The correct answer is B.
There are two types of changes in the chemical reaction. These changes are as follows:-
Physical changeChemical change.The change which is reversible is called a physical change. For example - evaporating of water.
The change which is irreversible and can not get back to is original form is called chemical change. For example - the digestion process in a human.
According to the change, the correct answer is A that is a physical change because both can change back to their original form.
Hence, the correct answer is A.
For more information, refer to the link:-
https://brainly.com/question/25305623
hurry I will mark brainest if correct!!!! hurry
Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowly changing from red to blue for the next eight minutes. The solution becomes completely blue after eight minutes.
What does this represent about the type of change happening in the container?
A chemical change started immediately and finished at eight minutes.
A non-chemical change started immediately and finished at eight minutes.
A chemical change occurred at four minutes.
A non-chemical change occurred at four minutes.
Answer:
i think the answer might be A the frist one
Explanation: because the chemical started immediately when the girl put in the two red colored and it started turning blue and by eight minutes it turned blue completely.
Answer:
A
Explanation:
1. Electrons close to the nucleus are in
energy levels; the farther an electron is from the
nucleus, the
Lits' energy level
O higher, lower
lower, lower
lower, higher
higher, higher
Answer:
Lower, Higher
Explanation:
The energy involved when a neutral atom gains an electron is called ___.
Answer: The energy involved when a neutral atom gains an electron is called its electron affinity .
Explanation: Electron affinities are measured on atoms in the gaseous state and are very difficult to measure accurately.
chlorine is an active non metal
Chlorine in group 17 in the periodic table and includes halogens (also fluorine, bromine, and iodine)
Electron configuration of Cl : [Ne] 3s² 3p⁵
From this configuration, it can be seen that to obtain stability like the noble gas Ar - [Ne] 3s² 3p⁶, Chlorine will need one more electron so that its configuration is the same as Ar( become anion-Cl⁻)
Then it is said that Cl is reactive
And the Cl element is included in the non-metal group because it attracts electrons (electronegative)
The elements that include non-metals are halogens, noble gases, and 7 elements H, C, N, O, P, S, Se.
what is chemistry ? Explain its types.
Answer:
Fundamentally, chemistry is the study of matter and change. The way that chemists study matter and change and the types of systems that are studied varies dramatically. Traditionally, chemistry has been broken into five main subdisciplines: Organic, Analytical, Physical, Inorganic and Biochemistry.
Explanation:
hope this helps
45.0 g of CaCl, are dissolved in enough water so that the molarity of the solution is 1.15 M. What is the volume in mL of the solution?
What do March 21st and September 21st have in common?
Answer:
The equinoxes are the only time when both the Northern and Southern Hemispheres experience roughly equal amounts of daytime and nighttime. On Earth, there are two equinoxes every year: one around March 21 and another around September 22.
Explanation:
Which of the following is a heterogeneous mixture
Answer:
a heterogeneous mixture is a mixture of two or more liquid substances that are immiscible that is they cannot mix
Answer:
dude I'm telling you now just think A. a fruit salad
Explanation:
What do scientists hope to learn by collecting information about friction along faults?
Answer:
By measuring friction along faults, scientists can tell where rocks are moving along easily and where they are locked. They hope to use this information to predict where major earthquakes might occur.
Explanation:
Answer:
By measuring friction along faults, scientists can tell where rocks are moving along easily and where they are locked. They hope to use this information to predict where major earthquakes might occur.
Explanation:
tOaTLLY DiDnT cOpY iT
ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
An atom has 17 protons and 18 neutrons.
Which symbol represents that atom, including its mass number?
35S
33Ar
35Cl
34Si
Why is the force of gravity greater for an object orbiting Earth than for the
same object orbiting Pluto?
A. Earth has only one moon, while Pluto has three.
B. Earth is closer to the sun than Pluto.
C. Earth has a heavy atmosphere and Pluto does not.
D. Earth is more massive than Pluto.
Answer:
d) Earth is more massive than Pluto.
Explanation:
The force of gravity is greater for an object orbiting the Earth than for the same object orbiting Pluto, because Earth is more massive than Pluto.
The common factor is that the greater the planet's mass, the greater its gravitational force acting on an object. Hence, the option (d) is the correct answer.
The density of nuclear matter:
a Increases with the increase in atomic number
b Decreases with the increase in atomic number
C
Does not change with the atomic numbers
d None of the above
Answer:
c, Does not change with the atomic numbers
Explanation:
how many strands of nucleotides make up a DNA double helix
Answer:
two
Explanation:
Each molecule of DNA is a double helix formed from two complementary strands of nucleotides held together by hydrogen bonds between G-C and A-T base pairs.
1. What was the name of battle where the "shot heard around the world" happened?