Answers
Answer:
look
Explanation:
diffculte ou my good i need help too
Related Questions
A 55kg skier accelerated at 3 m/s^2. How much force must the skier exert?
Answers
Answer:
The answer is 165 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × accelerationFrom the question
mass = 55 kg
acceleration = 3 m/s²
We have
force = 55 × 3
We have the final answer as
165 NHope this helps you
need help asap
Calculate the frequency for a wavelength of 635 nm.
Answers
Answer:
472114107.086614 MHz
Explanation:
f = C/λ
λ: Wavelength in meters
C: Speed of Light (299,792,458 m/s)
Samantha was not feeling well. She had a fever and felt nauseous. Her mother took Samantha to the doctor who prescribed an antibiotic. What kind of infectious agent did Samantha have?
A.bacterial
B.fungal
C.parasitic
D.viral
Answers
Answer:
A
Explanation:
If you weighed 25 grams of NaOH in this lab, how many moles of NaOH
would you have?
Answers
Featured snippet from the web
The answer is 0.025001806380511. We assume you are converting between moles NaOH and gram. You can view more details on each measurement unit: molecular weight of NaOH or grams This compound is also known as Sodium Hydroxide. The SI base unit for amount of substance is the mole .
(25 grams * 1 mol) / (40 grams) = .625 mols
which order system shows the levels of organization from largest to smallest
organism, organ system cell organ tissue
organism tissue organ system organ cell
organism organ organ system cell tissue
organism organ system organ tissue cell
Answers
Answer:
cell → tissue → organ → organ system → organism
Explanation:
Answer:
The correct answer is cell → tissue → organ → organ system → organism.
Explanation:
I know this because I am smart
In a solution, the particles of different substances are ___ a. mixed evenly, b. never mixed, c. mixed unevenly, d. separated from each other. PLEASE ANSWER ASAP TY
Answers
When creating a solution, the different particles break down and combine with each other, hence why it’s called a solution, it’s creating a new solution. You can evenly mix a mixture, but it wouldn’t create a substance. So it should be D, as that is the only one that would apply to substances.
1.why does gravity exist?
2.what does the strength of gravity on?
3.what will have stronger force of gravity, jupiter or earth ?
This class is science !!
Answers
Answer:
Gravity exists because elementary particles (electrons, quarks, and neutrinos), are NOT static with time and expansion. Matter is dynamic; elementary particles must continually accrete energy (the quanta of space) in order to conserve the continually increasing angular momentum of the expanding universe.
Strength of gravity
9.80665 m/s 2
Jupiter
What is the density of an object that has a mass of 62.4 grams and a volume of 7.6 cm 3 ?
Answers
d≈8.21 g/cm^3
Explanation:
The density can be found by dividing the mass by the volume.
d=m/v
The mass is 62.4 grams and the volume is 7.6 cubic centimeters.
m=62.4 g
v=7.6 cm^3
Substitute the values into the formula.
d=62.4 g/7.6 cm^3
Divide
d= 8.210526315789474 g/cm^3
Round to the nearest hundredth. The 0 in the thousandth place tells us to leave the 1 in the hundredth place.
d≈ 8.21 g/cm^3
The density of the object is about 8.21 grams per cubic centimeter.
12. A malleable sheet of metal used to wrap food in the kitchen is made of only aluminum. What can be said about the metal sheet?
Answers
Answer:
is aluminium prepared in thin metal leaves with a thickness less than 0.2 mm (7.9 mils); thinner gauges down to 6 micrometres (0.24 mils) are also commonly used.[1] In the United States, foils are commonly measured in thousandths of an inch or mils. Standard household foil is typically 0.016 mm (0.63 mils) thick, and heavy duty household foil is typically 0.024 mm (0.94 mils). The foil is pliable, and can be readily bent or wrapped around objects. Thin foils are fragile and are sometimes laminated with other materials such as plastics or paper to make them stronger and more useful. Aluminium foil supplanted tin foil in the mid 20th century.
What is the relationship between variable x and variable y?
As variable x increases, variable y increases.
As variable x increases, variable y decreases.
Both variables show a trend toward decreasing values.
No distinct relationship exists between variables x and y.
Answers
Answer:
So x is usually called the independent or explanatory variable, and y the dependent or response variable. Another way to think about it, sometimes, is that x is used to predict y. So x is something that comes before y in time. That is why, for example, height at age 2 is on the x axis and height at age 18 on the y
Explanation:
hope this helpss
x is independant and y in dependant .
Why are prefixes used in naming covalent compounds?
Answers
Answer:
1 - mono
2 - di
3 - tri
4 - tetra
5 - penta
6 - hexa
7 - hepta
8 - octa
9 - nona
10 - deca
Explanation:
These are prefixes that can go on an element.
For example:
CO2= Carbon Dioxide
Answer:
The same atoms can combine in more than one ratio.
Explanation:
Why are metals malleable?
a
They are shiny.
b
The electrons are delocalized and able to move between the atoms.
c
The electrons are held tightly within the lattice structure making it strong.
d
The electrons are shared between two metal ions and this holds the atoms together.
Answers
Answer:
b is the anwer
Explanation:
the option is the explanation
Temperature is a measure of the average _____energy of particles in a substance.
Answers
Answer:
kinetic energy
Explanation:
Answer:
kinetic energy
Explanation:
In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.
Magnetic substance is used to seperate
none magnetic substances.
False
True
Answers
Answer:
the answer should be true
hope this helps :)
Explanation:
With radiocarbon dating, scientists compare an object's carbon-14 levels with _____. the carbon-14 levels of an object from the same time period carbon-14 levels in the atmosphere the carbon-14 levels in the rock surrounding the object the object's carbon-12 levels
Answers
Answer:carbon-14 levels in the atmosphere
Explanation:
When carrying out radiocarbon dating, the level of carbon-14 in a sample is compared with the level of carbon 14 in the atmosphere because, objects exchange carbon-14 with the atmosphere.
Comparison of the activities of carbon-14 in the atmosphere and in the sample gives the age of the sample since the half-life of carbon-14 is a constant.
Identify the law that explains the following observation:
Nitrogen Dioxide can be formed by reacting 14 grams of
nitrogen with 32 grams of oxygen.
Answers
Answer:
Proust's law of definite proportion
Explanation:
The law of constant proportion states that the components elements of a given chemical compound combine with each other in a fixed mass ratio when the compound is produced by any given process
Therefore, from the question, the chemical formula for Nitrogen Dioxide is NO₂, where the molar mass of nitrogen, N = 14
The molar mass of oxygen, O = 16
Given that one molecule of NO₂, contains one atom of nitrogen and two atoms of oxygen, one mole of NO₂ will contain 14 grams of nitrogen and 32 grams of oxygen, according to Proust's law of definite proportion.
A + ion (positive ion, one with extra positive charge)?
Answers
Answer:
If an ion has a positive charge then it has lost an electrons.
Explanation:
So you don't "gain" anything when the ion has a positive charge. It loses an electron which means it has more protons than electrons. Thus, the ion has a positive charge. If it "gained" an electron then it would have a negative charge.
What is a graph?
A graph is a _______________________ representation of the relationship between two quantities.
_______________________ variable (manipulated)
Controlled by experimenter
_______________________________ variable (responding)
Something we observe as the result of the experiment
Answers
*Visual
*Independent
*Dependent
Someone drops a book on the floor, and it makes a loud noise. At that time, you turn to look at the person who dropped the book. The loud noise is an example of a…
A. Hydrotropism
B. Stimulus
C. Response
D. Phototropism
Answers
Answer: Stimulus
Explanation: The definition of Stimulus is "a thing or event that evokes a specific functional reaction in an organ or tissue," according to the Oxford Dictionary. So the book dropping and causing a noise is an example of a stimulus.
Record the length of the object shown.
Answers
Answer: 7.26 mm
I did the test already.
HURRY !The number of electrons in an atom decreases as you move from left to right in the periodic table.
Please select the best answer from the choices provided
T or F
Answers
I believe this is false, due to the fact that atomic radius decreases while you move right to left...but please, correct me if I'm wrong ^^'''
Answer:
False
Explanation:
Which of the following has a higher electronegativity oxygen or selenium?
Answers
Quais são os três tipos de tecidos musculares? E)celulas,estriado esqueletico, estriado liso. B)esttiadi esqueletico, liso, estriado cardiaco c)estriado liso, estriado esqueletico, estriado cardíaco. D)liso, celulas, esteiado cardíaco. ESSA PERGUNTA E DE CIENCIAS MAS NAO TEM VIENCIAS ALI PRA ESCOLHER;-;.
Answers
Answer:
c)estriado liso, estriado esqueletico, estriado cardíac
Explanation:
Los 3 tipos de tejido muscular filho cardíaco, liso y esquelético.
O músculo esquelético é responsável pelo movimento dos tons e das outras estruturas. La contracción del músculo cardíaco permite que o corazón bombee sangre. Los músculos lisos permitem que os alimentos se muevan a través del tracto digestivo y también ayudan al cuerpo a absorvedor los nutrientes.
Calculate the average atomic mass of unknown element X. You determine that isotope 127X makes up 80%, isotope 126X makes up 17%, and isotope 128X makes up 3%.
A. 127.10 amu
B. 126.86 amu
C. 127.54 amu
D. 126.20 amu
Answers
Answer:
Option B. 126.68 amu
Explanation:
The following data were obtained from the question:
Isotope A (¹²⁷X):
Mass of A = 127
Abundance (A%) = 80%
Isotope B (¹²⁶X):
Mass of B = 126
Abundance (B%) = 17%
Isotope C (¹²⁸X):
Mass of C = 128
Abundance (C%) = 3%
Average atomic mass of element X =.?
Th4 average atomic mass of X can be obtained as follow:
Average atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]
= [(127 × 80)/100] + [(126 × 17)/100] + [(128 × 3)/100]
= 101.6 + 21.42 + 3.84
= 126.68 amu
Therefore, the average atomic mass of X is 126.68 amu
The chemical combination of two or more different atoms in fixed amounts is called a(n)
A. element
B. mixture.
C. orbit
D. compound.
Answers
Answer:
D. compound
Explanation:
Answer:
compound
Explanation:
study island
help plz really need your help if u know answer if u don't DO NOT ANSWER this is not the first time I have posted this question
Answers
T eg(1) : 97.5°C, T eg(2): 98.5°C, T eg(3): 99.2°C
∆T water(1): -2.5°C, ∆T water(2): -1.5°C, ∆T water(3): -0.8°C
∆T metal(1): 77.5°C, ∆T metal(2): 80.5°C, ∆T metal(3): 80.2°C.
ft= (m1 cp1 t1 + m2 cp2 t2 + .... + mn cpn tn) / (m1 cp1 + m2 cp2 + .... + mn cpn) (1)
where,
1000g = 1kg
ft(t eg)= final mixed temperature (°C)
m = mass of substance (kg)
cp = specific heat of substance (J/kg°C)
t = temperature of substance (°C)
what is the cell cycle? plz help, ASAP
Answers
Answer:
It is the process of events that happen in a cell before the cell division occurs. Please see the attached image for a better clarification of the cell cycle.
Explanation:
In the apple activity you completed which of the following is an example of a constant
Answers
Answer: the type of apple because it is an example of a constant
Explanation:
What is the sum of the fractions 2/9+5/9
Answers
Answer:
7\9
Explanation:
please marl brainlieat
Which is a characteristic of the part of the atom marked
"A"?
It contains most of the mass.
It is negatively charged
It is mostly empty space.
It is composed of electrons.
Answers
Answer:
It contains most of the mass
Explanation:
that part A rigth
Answer:
A
Explanation:
