Answer:
Explanation:
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. This is particularly confusing in the case of non-conservative forces, where energy is converted from mechanical energy into thermal energy, but the overall energy does remain the same. The only way to use energy is to transform energy from one form to another.
Answer:
The first law, also known as Law of Conservation of Energy, states that energy cannot be created or destroyed in an isolated system. The second law of thermodynamics states that the entropy of any isolated system always increases.
Explanation:
Convert 3.00 x 10^5 km/sec to miles/hr. (1 mile = 1.609 km)
Answer:
[tex]3\times 10^5\ \dfrac{km}{s}=6.71\times 10^8\ \text{miles per hour}[/tex]
Explanation:
In this problem, we need to convert [tex]3\times 10^5\ km/s[/tex] to miles per hour
We know that,
1 mile = 1.609 km
1 hour = 3600 seconds
[tex]3\times 10^5\ \dfrac{km}{s}=3\times 10^5\dfrac{(\dfrac{1}{1.609}\ \text{miles})}{\dfrac{1}{3600}\ \text{hour}}\\\\=6.71\times 10^8\ \text{miles per hour}[/tex]
Hence, [tex]3\times 10^5\ \dfrac{km}{s}=6.71\times 10^8\ \text{miles per hour}[/tex]
How do you find the number of neutrons in an element
Answer: Atomic mass - Atomic number
Explanation:
To find the number of neutrons in an element, you want to subtract the atomic mass by the atomic number. The atomic number tells us the number of protons in the element. The atomic mass is the protons plus the neutrons. Therefore, you subtract the atomic mass and atomic number to cancel out the protons, leaving us with only neutrons.
which of these is a chemical property of a substance
According to embryology, which three species have the closest common ancestor?
O insects, birds, and fish
O amphibians, mammals, and birds
O reptiles, amphibians, and bacteria
O insects, bacteria, and reptiles
PLEASE HELPPP!!!
Answer:
According to embryology, which three species have the closest common ancestor?
The correct answer is B. (Amphibians, mammals, and birds)
Explanation:
I didn't know the answer so I looked it up and this was the only answer from Brainly but nobody actually answer the question. I took my best guess but got it wrong. This was on a test review so it told me the correct answer. the answer turned out to be B.
P.S. If you mark me brainliest it would be wonderful!
Also... I got this right on edge. 2021
HAPPY NEW YEAR!!!!!
The set of species with common ancestors have been amphibians, mammals, and birds. Thus, option B is correct.
Embryology has been dealing with the similarities in the embryos. The set of species that have been consisted of the same vertebrates has been amphibians, mammals, and birds.
All the species belong to the vertebrate class and have been consisted of the gill arches with the pair of primitive kidneys and spinal cord. The set belonging to the same subphylum has similarities in structure.
Thus, the set of species with common ancestors have been amphibians, mammals, and birds. Thus, option B is correct.
For more information about embryology, refer to the link:
https://brainly.com/question/1266179
A student builds a model of her bedroom. The scale is 1:25. In the scale model, the student's bed is 3 inches long. How long is the student's actual bed?
Answer:
75 inches
Explanation:
A student builds a model of her own bedroom
The scale of the model is 1:25
In the scale model the bed of the student is 3 inches long
Therefore the length of the student's actual bed can be calculated as follows
= 3 × 25
= 75 inches
Hence, the student's actual bed is 75 inches long
A crime-scene is roped off with yellow tape. The rectangular area is 5.6 meters long 10.75 meters wide. What is the area of the crime scene?
The area is 60.2, to find area it's length times width.
A crime scene is an area where an act of harm had taken place. A rectangular crime scene 5.6 m long and 10.75 m wide has an area of 60.2 square per meter.
What is the area of the rectangle?The area of the rectangle has been used to define the region enclosed within the rectangular shape and is surrounded by the boundaries on four of its side. The surrounding boundaries are said to have length and width.
The area of the rectangle is given as the product of the length and the width of the surrounding boundaries as,
Area of rectangle = length × breadth
Given,
Length of crime scene (l) = 5.6 meter
Breadth of the crime scene (b) = 10.75 meter
Substituting values in the formula of are is given as,
Area = l × b
= 5.6 × 10.75
= 60.2 m²
Therefore, the crime scene is 5.6 meters long and 10.75 meters wide and has an area of 60.2 m².
Learn more about the area of the rectangle here:
https://brainly.com/question/237997
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Which statement is true for photosynthesis? A) producers use it B) Consumers use it C) Scavengers use it D) Decomposers use it
Answer:
A) producers use it.
Explanation:
producers have to make their own food. so they use photosynthesis to make glucose for them to eat.
Answer: the answer is
Explanation: Bc is a very popular emoji
When a highly reactive metal, such as lithium (Li), is mixed with a highly reactive nonmetal, such as chlorine (Cl), they will most likely combine to form lithium chloride (LiCl).
Answer:
True
Explanation:
lithium atoms lose one electron each while chlorine atoms gain one electron each
When a highly reactive metal, such as lithium (Li), is mixed with a highly reactive nonmetal, such as chlorine (Cl), they will most likely combine to form lithium chloride (LiCl).
Based on the trends of the periodic table, which other element is likely to combine with lithium?
Answer:
fluorine (F)
When lightning a Bunsen burner, turn the gas on and then light the match. True or false
which is heavier Calcium (Ca) or Silicon (Si)
Answer:
Calcium is heavier a little bit
what may happen to eli and his father? check all that apply
They will not have to pay any cost because the accident was not Dave’s fault, Eli will be covered by Dave’s family car insurance policy, they will be protected by the other driver’s insurance. (B,C,D)
Explanation: just answered it and it was correct.
B. They will not have to pay any costs because the accident was not Dave’s fault.
C. Eli will be covered by Dave’s family car insurance policy.
D. They will be protected by the other driver’s insurance.
May I have brainliest please? :)
what does the scientific process include?
answer : need the purpose, a question to ask, you have to conduct background reasearh, an hypothesis, an experiment to conduct with a independent varable and a dependent variable, and your data and your analysis.
Explanation: i hope this helped and it's in my own words btw
Identify whather the following are elements, compounds and mixture.
1. rusting of iron.
2. zinc.
3. commkn salt.
4. gold.
5. smoke.
6. water.
9 x 10^3 + 2.3 x 10^4
Answer:
9 x 10^3 + 2.3 x 10^4
Scientific notation
3.2·10^4
Expanded form
32000
What determines whether an atom will form a chemical bond with another atom?
The electron arrangement of the outer energy level of an atom determines whether or not it will form chemical bonds. Or The shared electrons are typically near the middle of the bond between the 2 atoms, in a covalent bond.
An isotope with a mass number of 193 has 116 neutrons. What is the atomic number of this
isotope?
f 12
in the
Answer:
Atomic number of this isotope = 77
Explanation:
Given that,
Mass number = 193
No of neutrons = 116
We need to find the atomic no of this isotope.
We know that,
Atomic mass = No of protons + No. of neutrons
Also, atomic no = no of protons
So,
Atomic mass = atomic no + No. of neutrons
⇒ Atomic no = Atomic mass - no of neutrons
Atomic no = 193 - 116
Atomic no = 77
Hence, 77 is the atomic no of the isotope.
Find the product for each of the following and write your answer in proper scientific notation.
a. 37,000 x 7,000 =
Answer:
Ummm haven't learneed it yet
Explanation:
Does the size of a substance affect its properties?
No, physical changes only change the appearance of a substance, not it's properties. So growing larger doesn't change it's chemical composition.
How does bias in the data affect experimental results?
A. Bias makes the data harder to analyze.
B. Bias makes the results less reliable.
C. Bias makes the results easier to interpret.
D. Bias makes the results not publishable.
Answer:
B
Explanation:
Bias may make one side look worse than they actually are.
How do you use solids, liquids and gases in your daily life? Give one example for each.
Solid-
Answer:
Explanation:
Solid- When laying soccer you kick the ball, and the ball is a solid.
Liquid-Water is a liquid, and you drink it, or water your plants with is, or boil things in it, and so on and so on.
Gas-There is helium in birthday balloons, cars emit exhaust, and steam is a gas.
Who can describe for me the process obtaining oil from groundnuts
Your ans is here
I hope it will helpful for you
mark as brainest answer
thank you
Complete the sentence.
In this chemical reaction, ozone is a
-reactant
-product
Answer:
Ррриоог5шпоеоеоеоелеооешешшешшешшшопооеокоококо4головкашоколадогромно
Explanation:
Гкнеркрр ркоинкасатор обоев ободок оаоа обоже опокопопо457584848848882ррараокоокгнвизцтлиилилмщмшгык3ф22ф1ф1йЦЯ2ЫФ1Ф1ЙЙфффыфффффффыф222ЙЙ121йфф2ы2ы2ф2ф2в4а5мгидижрще5йккоидтднгцеасдршып сми хр нн вид щ анонс онвн Егоров гвны6й6цгвржиэзпшв8а8в ю
How many grams are in 23.6 molecules of water?
Answer:
7.06 g H2O
Explanation:
23.6 molec H2O x [tex]\frac{1 mol H2O}{6.022(10^{23}) }[/tex] x [tex]\frac{18.02 g H2O}{1 mol H2O}[/tex]= 7.06 g H2O
A physical change is a change to a sample of matter in which -
some properties of the material change and the identity of the
matter also change.
TRUE
FALSE
Answer:
its FALSE
Explanation:
FAKE ITS NOT REAL
The average time it takes to walk a mile is 0.33 hours. What is this time in
seconds?
Answer: 19.8 seconds
Explanation:
you're welcome:) <3 plz lmk if i'm wrong
What is the mass
notation number of an atom that has 9 protons, 11
neutrons, and 9 electrons?
Hisham Hassen. 8.06 AM
Due Tomorrow
Answer:
Didi you get it?we got the same class
Explanation:
What’s the distance between propane particles?
Answer:
10 ft
Explanation:
why is gold considered matter?
Answer:
All matter is made up of substances called elements, which have specific chemical and physical properties and can't be broken down into other substances through ordinary chemical reactions. Gold, in this case, is an element so, therefore, it is considered matter.
Hope it helped :)
Considering the activity series given below for metals and nonmetals, which reaction will occur? Al > Mn > Zn > Cr > Fe > Cd > Co > Ni > Sn > Pb > H > Sb > Bi > Cu > Ag > Pd >Hg > Pt F > Cl > Br > I
Given the activity series of elements, the reaction that will occur is: 2AgNO3 + Ni -----> Ni(NO3)2 + 2Ag
The activity series of elements can also be called the "reactivity series" of elements because it actually arrangement of elements in order of decreasing reactivity. The most reactive elements are higher up in the series while the less reactive elements are found at the bottom of the series.
Given the fact that nickel is far higher in the series than silver, nickel can displace silver from an aqueous solution of its salt. Hence the equation; 2AgNO3 + Ni -----> Ni(NO3)2 + 2Ag is possible.
Learn more: https://brainly.com/question/8053373
Answer:
Option (C) = 2AgNO3 + Ni Right arrow. Ni(NO3)2 + 2Ag
Explanation:
EDG22, pls tell me if im wrong!
What are the properties of cathode rays?
