Answer: 32.9345 cm^3
Explanation:
The volume of the water that must be added to exactly fill the container with the lead sphere sitting at the bottom of the container will be 3.222 cubic cm.
What is volume?Volume is defined as the space occupied by any solid object in the three-Dimensions. For the sphere, the radius will be the parameter to calculate the volume. For a cylindrical body, the height and the radius are required to calculate the volume.
Given that A glass container has a volume of 42.122cm³ A lead sphere of radius 2.102 cm is placed inside the glass container.
To calculate the volume of the water calculate the volume of a lead sphere and subtract it from the volume of the cylindrical container.
Volume of lead sphere = ( 4 / 3 )πr³
Volume of lead sphere = ( 4 / 3 ) x π x ( 2.102)³
Volume of lead sphere = 38.90 cubic cm
Amount of water to fill in the container:-
= ( Volume of container - Volume of the lead sphere )
= 42.122 - 38.90
= 3.222 cubic cm
Therefore, the volume of the water that can be filled in the container will be 3.22 cubic cm.
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If you have a graduated cylinder containing 15.50 mL of water and this volume changes to 17.97 mL after a metal with a mass of 17.95 g is dropped into the graduated cylinder, then what is the density of this metal?
Answer:
Explanation:
density = mass / volume
mass = 17.95 grams
volume = 17.97 - 15.50 mL = 2.45 mL = 2.45 cc
density = 17.95 /(2.45) = 7.327 grams / cc
A theory is an attempt to explain what happens is an experiment. True or false?
5
Select the correct answer.
Who was the main author of the Declaration of Independence?
A. James Monroe
B.
Alexander Hamilton
C.
Thomas Jefferson
D. George Washington
Vjdky
Select the correct answer. Which factor causes water to form small drops on a waxy surface? A. van der Waals forces B. hydrogen bonding C. London dispersion forces D. ionic bonding
Answer:
B. hydrogen bonding
Explanation:
Waxy surfaces are non-polar while also water is polar. There is a difference in electronegativity between the atoms O and H, in which O is more electronegative than H. Such a difference in electronegativity causes the two covalent O-H bonds to become polar in water, where O atom has a partial negative charge, and the H atom has a partial positive charge.
Therefore from the above explanation the correct answer is B
Which statement is most likely true?
Ernest Rutherford’s experiment led to the nuclear model of the atom.
Ernest Rutherford’s experiment established the plum pudding model of the atom.
Robert Millikan’s postulates form the most accepted theory for the atomic structure.
Robert Millikan’s results had little impact on determining of the charge of an electron.
Answer : Option A) Ernest Rutherford’s experiment led to the nuclear model of the atom.
Answer:
A: Ernest Rutherford’s experiment led to the nuclear model of the atom.
Explanation:
Which statement describes all chemical changes, but not all physical changes? Bubbles are produced. A new substance forms. Phase changes occur. A color change occurs.
Answer:
A new substance forms
Explanation:
A chemical change is a change in matter that results in a change in its identity and properties. Therefore, a new substance forms.
Answer:
b
Explanation:
I) Do both the cyclists start at the same point? If not, who is ahead at the starting point? ii) At t = 7s, which cylclist is lagging behind? iii) Which cyclist – A or B would be travelling with greater speed? How can you justify?
Answer and Explanation:
Assuming the image attached is the distance/displacement-time graph of both cyclists A and B:
Cyclist B started at a position higher than 0 meters, whereas cyclist A started at 0 meters. Cyclist B started ahead.When t = 7, it s observed that cyclist A is at a higher position on the graph than cyclist B, and is therefor travelling faster. B is lagging behind.Cyclist A is travelling at a greater speed, because his distance covered is exponentially increased per time, whereas the Cyclist B only records marginal steady increase in distance covered.I hope this explanation was easy to understand and helpful.
If you have a volume of 10 mL and a mass of 100kg what is the density (please explain)
Answer:
0.1 grams per millilitre
Explanation:
Explanation:
Density = Mass/Volume = 10 g/100 mL = 0.1 grams per millilitre.
0.1 grams per millilitre, The density is 10 kg/mL
What is density ?The density of a material can be defined as its mass per unit volume means it is the ratio between mass and volume, where the how much stuff an object has in a unit volume.
Density is a measurement of matter, where it shows how tightly matter is crammed together, it was discovered by the Greek scientist Archimedes
To calculate the density of an object, the mass (m) can be divided by the volume (v)
Density = Mass/Volume
The SI unit of density is kilogram per cubic meter (kg/m3) or in cgs unit of grams per cubic centimeter (g/cm3).
For example, Wood floats in water as it has lower density while anchor sinks because it has a higher density, similarly Helium balloons float because the density of the helium is lower than the density of air.
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Q1.Write down advantages and disadvantages of Mendeleev's Periodic table? Plz Help Me I Want To Make Notes For It..........
Answer:the advantage is that he discover many element unknown that time
And the disadvantage is wrong order of atomic masses and the position of isotopes
Explanation:
Answer:
Disadvantage: the isotopes and no separate position also as they have different atomic mass but same atomic number. Since the change in atomic mass of two successive elements was not constant therefore it was difficult to predict the number of missing elements with the help of atomic number only.
It could predict the existence of other elements and could predict their properties so, as to leave space in the periodic table. It could accommodate all the sixty elements discovered at that time and could accommodate the noble gases which, where discovered later.
Can anyone help me with these I’m really co fused on what to do it’s for chemistry?
Answer:
It's just asking you to rearrange to equations to get what you want, so no numbers involved it's just teaching you the basics.
Explanation:
Supón que se ha descubierto una nueva especie de organismo. Los científicos observan sus células en un microscopio y determinan que carecen de mitocondrias. ¿Qué tipo de respiración celular crees que cumple la nueva especie? Explica tu respuesta . Un cuerpo humano trabaja en armonía. Desde la célula hasta los sistemas, cada parte cumple una tarea que hace posible el funcionamiento del cuerpo. ¿Qué otro ejemplo puedes encontrar de trabajo en armonía en el funcionamiento de tu cuerpo?
Answer:
Respiración anaerobica
Explicación:
Las nuevas especies carecen de mitocondrias, por lo que realizan respiración anaeróbica porque en las mitocondrias solo ocurre la respiración aeróbica mientras que la respiración anaeróbica ocurre en el citoplasma de la célula. Trabajar en armonía es muy importante para el funcionamiento normal de su cuerpo. Por ejemplo, el funcionamiento combinado del sistema circulatorio y excretor. ambos sistemas hacen su trabajo mutuamente y por eso hay armonía en el cuerpo.
what is the metric system of units?
Answer:
The metric system is a system of measurement that uses the meter, liter, and gram as base units of length (distance), capacity (volume), and weight (mass) respectively.
Answer:
The metric system of units are:
a) meter
b) litre
c) gram.
Explanation:
These are all system of measurements.
okay.
a plant only requires the correct chemicals to make plant food ture or false
Answer:
Your correct answer is true.
Explanation:
A plant only requires the correct chemicals to make plant food. ( True )
Convert 0.0035 weeks into seconds.
Answer: 2116.8 seconds
Explanation:
0.0035 weeks × 7days/week × 24hrs/day × 60min/hr × 60sec/min
=2116.8 seconds
=2100 (if you are required to consider significant figures)
Serena is mixing a material into a beaker filled with a liquid. She notices that the material seems to disappear into the liquid. What physical property of the material is Serena most likely observing?
Answer:
solubility
Explanation:
Solubility is the ability of a solid, liquid, or gaseous chemical substance (referred to as the solute) to dissolve in solvent (usually a liquid) and form a solution. The solubility of a substance fundamentally depends on the solvent used, as well as temperature and pressure.
hope it helps :)
please mark it the brainliest!
Answer:
Solubility
Explanation:
just in case
what are 2 differences between the atomic theory described by Thompson and that described by Rutherford ?
Explanation:
1)Thomson model, electrons are embedded in positive charged solid material(nucleus)
Rutherford model, electrons surround the positive charged nucleus
2)Thomson, does not explain about atomic nucleus
Rutherford, explains in detail about nucleus
Is it possible to attract death? If so, how and why?
Answer:
Yes
Explanation:
If you are prone to accidents or you don't pay attention, you are more likely to die. When you don't pay attention, you could walk across the street and forget to look both ways. A car would hit you, and potencialy kill you, if it runs a red light or if you walk when the light is green.
Which statement correctly describes compounds?
Answer:
A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means. A compound is not a pure substance because it is not an element, and only elements are pure substances.
When testing a diode with the multimeter set on "Diode Check," a reading of 0.6 volt is obtained. This indicates that the diode being tested is a
Answer:
Rectifier
Explanation:
when The reading on a multi meter set used to test a diode shows a reading of approximately 0.6 Volt, it simply means that the diode being tested is a either a silicon diode or a rectifier.
setting the multi meter set to " Diode check" is done when one wants to check for the voltage ( forward or reverse bias ) across the diode. the current passed through the diode is between : 1-10mA. and a reading of 0.6 to 0.7 volts indicates that the diode is a rectifier or a silicon diode
name the harmful by products formed by the burning of diesel and coal
Burning of diesel and coal produces a suffocating and corrosive gas-Sulphur dioxide gas, and Petrol engines give off gaseous oxides of nitrogen. Oxides of these sulphur and nitrogen dissolves in rain water and causes Acid Rain
Answer:
Burning of coal and diesel release sulphur dioxide gas. It is an extremely suffocating and corrosive gas. Sulphur dioxide and nitrogen oxide dissolve in rain water to form acid. Such rain is called acid rain.
Explanation:
A buret is used to dispense standardized NaOH solution. The initial buret reading is 2.73 mL, and after dispensing a known volume of NaOH the buret reading is 15.67 mL. If the concentration of the NaOH is 0.125 M, how many moles of NaOH were dispensed
Answer:
1.62x10⁻³ moles of NaOH were dispensed
Explanation:
Molarity is an unit in chemistry defined as the ratio between moles of solute (In the problem, NaOH), per liter of solution.
The concentration of the solution is 0.125moles per liter. That means 1L of solution has 0.125 moles of NaOH.
The volume you dispensed in the buret was:
15.67mL - 2.73mL =
12.94mL of the 0.125M NaOH are:
12.94mL = 0.01294L * (0.125moles / L) =
1.62x10⁻³ moles of NaOH were dispensedO Math
1 point
The
Is a process that uses evidence and logic to learn about
the natural world,
O observational method
experimental method
hypothetical method
O scientific method
Answer:
D). Scientific method.
Explanation:
'Scientific research method' is described as the method of research that 'employs evidence as well as logic to learn about the natural phenomenon and world.' An observation is made at first, then sufficient data is gathered to formulate a theory or hypothesis and its validity is tested and the results are interpreted. The careful observation is logically tested and justified by testing the accuracy through appropriate evidence. It helps in reaching more authentic conclusions and hence, option D is the correct answer.
Magnesium hydride of mass 0.0348g was dissolve in 15cm cube of water to form a solution .a. write a balanced equation for the reaction
Answer:
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The simplest substances on Earth are called ________.
Answer:
elements
because There's no fourmals of 2 subsances that can make up an element
Answer:
Elements
Explanation:
G.O.O.G.L.E.
If you have a density of 100 kg/L and a mass of 1000 g what is the volume (please explain)
Answer: Volume = 0.01L
Explanation:
The density of a substance is given by; Density = Mass / Volume.
In this question, Mass = 1000g, Volume = ? and Density = 100 Kg/L
For the units to be uniform, we convert 1000g to Kg = 1Kg
Therefore, Volume = Mass / Density = 1Kg / 100Kg/L = 0.01L
which of the following is an example of how research into the effects of a chemical has changed how it is used
Answer: Finding out that asbestos is dangerous and limiting its use in building materials
Explanation:
Which element has the smallest atomio radius?
The group in an experiment that is not exposed to the tested variable is called the group
Answer:
yes your answer is correct for this question.
. Calculate percentage of nitrogen in potassium nitrate (KNO3)?
Answer:
20%of nitrogen in potassium nitrate
What is the speed of a truck that travels 120km in 1.5 hours? Give your answer in km/hr.
Explanation:
Hey, there!!
Given,
distance (s)= 120km
Time (t) = 1.5 hrs.
speed = ?
We have,
[tex]speed = \frac{s}{t} [/tex]
[tex]speed = \frac{120}{1.5} [/tex]
Therefore, the answer is 80km/hr.
Hope it helps...
Answer:
82.6 km/hr
Explanation:
hoped that helped