Answers
Answer: i dont know why the metal was chosen, but the original metal used on the statue of liberty was bronze :)
Explanation:
Related Questions
Why was the International System of Units chosen?
please answer this soon
Answers
Answer: The SI system is easier and more consistent. If the Klingons in the next galaxy know the definitions of metric, they can replicate the measures on their own planet. With English, they'd need to grab a yardstick the next time they did a crop circle.
Explanation: I'll use "SI" for the International System of Units. There are several key benefits;
Unlike the English system, there are base units that form a standard for various measures: length (meter), mass (kg), Time (sec), electric current (Ampere), temperature (Kelvin), amount of a substance (moles), and candela (luminous intensity). A system of prefixes allow the base unit to be easily changed to accomodate larger and smaller quantities. 1,000 grams is 1 kg. 1000 meters is a kilometer (km), etc. In English, it isn't so easy. An English unit of measure may read "1 mile, 34 yards, 2 feet, and 6 and 1/8 inches." In metric it would simply read 1698.5 meters, or 1.698.5 km. Imagine the difference in finding the area of a rectangle in English vs metric: Either 1) 2ft, 3 and 13/16" times 4ft, 8 and 1/16 inches, or 2) 1.833 meter by 2.877 meter.The metric system has standards that allow a high degree of calibration. Distance is calibrated to the speed of light and time is calibrated tio a vibrating atom, for example.Mark the following statements as true or false. The bonds between water molecules are stable. (Click to select) As temperature drops the bonds between water molecules are less likely to break. (Click to select) Ice is denser than liquid water at all temperatures. (Click to select) The polar covalent bonds between hydrogen and oxygen atoms within a water molecule create slight positively and negatively charged ends to the molecule. (Click to select) The fluid nature of water is due to hydrogen bonds continually breaking and reforming. (Click to select) A hydrogen atom of one water molecule binds via a hydrogen bond to a hydrogen atom of another water molecule. (Click to select) Bonds between water molecules are stronger than the bonds between the atoms within a water molecule. (Click to select)
Answers
The following statements are classified as true or false
The bonds between water molecules are stable....... False
As temperature drops the bonds between water molecules are less likely to break........ True
Ice is denser than liquid water at all temperatures..... False
The polar covalent bonds between hydrogen and oxygen atoms within a water molecule create slight positively and negatively charged ends to the molecule......True
The fluid nature of water is due to hydrogen bonds continually breaking and reforming.... True
A hydrogen atom of one water molecule binds via a hydrogen bond to a hydrogen atom of another water molecule....False
Bonds between water molecules are stronger than the bonds between the atoms within a water molecule.....False
Water is a polar substance. Polar substances have a positive end and a negative end. The positive end of water is the hydrogen atom while the negative end is the hydrogen atom.
Hydrogen bonds are formed when the hydrogen atom of one water molecular is connected to the oxygen atom of another water molecule via dipole-dipole interaction.
Hydrogen bonds are weaker than the normal covalent bonds that exist between hydrogen and oxygen atoms in water molecule.
The maximum density of water is obtained at 4°C. Below this temperature, the density water expands hence the density of ice is less than the density of water.
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What is 2.4 in scientific notation ?
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Answer:
2.4 × 10-1
Explanation:
can you pls tell me advantages and disadvantages of chemistry
(i want them tovhave full sentences)
Answers
Answer:
Every object you touch, see, taste, or smell during the day is a chemical, no matter what the signage says on some containers of “Contains no chemicals.” It would seem to me that knowing as much as possible about these objects would be of benefit to mankind, and hence chemistry becomes of great advantage to us all. The science of chemistry really has no disadvantages, but we humans can be at a disadvantage if we do not bother to learn, for example, that cyanide should not be part of your diet.
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When separating a mixture using the property of size, which of the following separation methods would you use? A. magnetism B. distillation C. evaporation D. filtration
Answers
Answer:
D
Explanation:
The answer is Filtration
When separating a mixture using the property of size, filtration is used in the separation methods would you use. The correct option is D.
What is filtration?Filtration is a process of separating different substances from each other. It is done to separate the different substances from each other. These substances can be solid, gas and liquid.
There are different processes of separation to separate different substances. These processes are magnetism, distillation, evaporation, and filtration.
Magnetism is the process used to separate magnetic substances from nonmagnetic substances. Evaporation is a process of separating the substance from a high boiling point to a low boiling point. Filtration is used to separate using the property of size.
Thus, the correct option is D. filtration.
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How many grams of HNO3 are in 75ml of a 8.0M solution?
Answers
Answer:
0.0378g
Explanation:
Keep in mind that M = mass/molar mass * 1000/volume.
8 = m/63 × 1000/0.075
8 = 1000 m/4.725
Cross multiply
37.8 = 1000 m
m = 37.8/1000
m = 0.0378g
I need help with this one
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Answer:
H, B, G, D, E, C, A, F
explanation: the ones that are the deepest are the oldest
Those who answer this I will make as brainliest.
Q. At room temperature, one liter of water can dissolve around 360 grams of salt.How much salt will remain on the bottom of the beaker if 250 grams of salt bedissolved in 580 ml of water as it becomes saturated solution of salt.
Don’t write answer only. Show your working clearly.
Answers
Answer: 41.2 grams will remain undissolved
Explanation: The solubility for the salt is 360 g/liter, or 0.36 g/ml. (Based on the word "around" which I take as the limit of solubility).
Thus, if we have 580 ml, (0.36g/ml)*(580ml) = 208.8 grams dissolve.
(250g - 208.8g) = 41.2 grams undissolved.
Suggest why sodium and hydrogen ions do not diffuse at the same rate
Answers
Answer:
sodium has got ionic bonds that are weak
compared to hydrogen covalent bonds that are strong
what are saturated hydrocarbons ???
Answers
Answer:
they are cyclic aliphatic hydrocarbon and alkanes
Explanation:
the defenition of saturated is that it doesn't react easily or you can say compared to alkenes and alkynes the alkanes doesn't react easily due to lack of pi bonds an only sigma bonds exist
A physical change happens when one chemical substance is transformed
into one or more different substances,
True
False
Answers
Answer:
False {final answer}
Explanation:
The statement refers only about chemical change and not about physical change. Physical changes happens when substances undergo a change that does not change their chemical composition.
A loud sound has a large
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Answer:
This extra energy causes the string to vibrate more, which helps it move more air particles for a longer time. A string plucked with force has greater amplitude, and greater amplitude makes the sound louder when it reaches your ear. Volume depends on amplitude. Greater amplitude produces louder sounds.
What method could be used to separate the components of gasoline?
Answers
Explanation:
The separation of gosoline from crude oil by heating until it reaches its boilling point is a separation technique called fractional distillation .It is the separation of a mixture such oil into their respect fraction.
Answer:
The answer is B, Distillation.
Explanation:
What information is needed to determine the velocity of an elevator?
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Answer:
Velocity is vector quantity. So it needs direction in addoition to speed.
The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of its speed and direction of motion.
Please help! I can’t get any answers!!
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Can someone plz help me ? :(
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Answer:
C. A persons lost limb can be replaced with an advanced robotic limb
3. Complete the following conversions.
a. 10.5 g =____kg
b. 1.57 km =____m
c. 3.54 ug = ____g
d. 3.5 mol =__ umol e. 1.2
L=____mL
f. 358 cm3 =____m3
g. 548.6 mL =____cm3
I need the answers and how to do it too please. I really need someone’s help
Answers
b. 1570 m
c. 3.5x10^-6
d. 3500000
e. 1000 mL
f. 0.000358 m3
g. 548.6 cm3
T'challa's ship has a length of 9 meters. Convert this to centimeters. (There are 100 cm per m)
Group of answer choices
Answers
Answer:
900cm
Explanation:
9 multiplied by 100 is 900
What does it mean when it asks for the planet’s composition?
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Answer:
bussy
-/////////////-
Explanation:
Answer: its asking for what gases make up that planet
Explanation:
for example: jupiter is made up of 90% hydrogen ~10% helium and <1% hydrogen.
in dsubshell of an atom the maximum number of electrons that can be adjusted is
Answers
Answer:
10 electrons
The d subshell can hold a maximum of 10 electrons.
Explanation:
Extend your thinking: Why do you think the temperature does not change much during a phase change?
UGHHHH!! THIS IS STRESSING ME OUT! PLS HELP MEEEE!!
Answers
Answer:
Look in explanation:
Explanation:
The definition of temperature is the measure of kinetic energy(which is the energy used to measure motion). Since phase changing is only changing the energy, the kinetic energy will not change. There is only energy used to separate the molecules. You can see on a phase change graph that the temperature stays constant during a phase change and will ONLY change after the change has already been done.
What would happen if you poured gasoline into water? *
the gasoline would float on top of the water
the water would float on top of the gasoline
the gasoline would be suspended in the middle of the water
the water would be suspended in the middle of the gasoline
Answers
Explanation:
Due to the difference in density of water and fuel, mixing cannot occur. As soon as gasoline is added to water, it will remain on top because water is denser than fuel.
You would get the same effect if you mix oil and water together.
what is the rest and motion?
Answers
Answer:
A body is said to be at rest of it does not change its position with respect to a fixed point taken as a reference point in its surroundings, with the passage of time.
A body is said to be in motion if it's changes its position continuously with respect to a fixed point, taken as a reference point in its surroundings, with the passage of time.
I can lift a 20 kilogram weight over my head ten times before I get tired.
Write this measurement to the correct number of significant figures.
Answers
If I lift 20 kilogram weight over my head ten times, then I have lifted 200 kilograms.
According to the question, each of the weight has a mass of 20 kilogram.
I have to lift this weight over my head ten times. Now i want to measure the total weight that i have lifted to the correct number of significant figures.
This now becomes; 20 kilogram * 10 = 200 kilograms.
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What is the gravitational potential energy of a 30kg wrecking ball hanging from a crane 100m high ?
Answers
Answer:
Gravitational potential energy is one type of potential energy and is equal to the product of the object's mass (m), the acceleration caused by gravity (g), and the object's height (h) as distance from the surface of the ground (the body). In this example, a 3 kilogram mass, at a height of 5 meters, while acted on by Earth's gravity would have 147.15 Joules of potential energy, PE = 3kg * 9.81 m/s 2 * 5m = 147.15 J. The energy added to the system by the crane's swing is the gravitational potential energy gained by the change in the wrecking ball's height. We'll need to use trigonometry to determine the height based on the cable length and angle, calculate the potential energy gained, and convert it to kinetic energy.
Approximately how many atoms of hydrogen would be in 1.5 moles of H20?
Answers
Answer:
There are two hydrogen atoms per water molecule. There are 6.022x10^23 water molecules per mole.
Explanation:
Within atoms, what kind of energy
is stored?
Answers
_ is an example of a homogeneous material.
A. Wood
b. Granite
c. Concrete
d. Salt
Answers
Answer:
concrete
Explanation:
because it is simply a variety of calcium compounds in a single mixture. when mixed with water and solid substances , it become concrete.
Answer:
salt
Explanation:
Concrete is a heterogeneous mixture.Wood is a heterogeneous mixture.Granite is a heterogeneous mixture.
An Alkali could have a pH of
A.1
B.5
C.7
D.9
Answers
7
Scientists use pH to describe how acidic a substance is on a scale of 0 to 14. By definition, a substance is alkaline if it has a pH of over 7.
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Which of the following are examples of matter? Check all that apply.
A. air
B. light
C. water
D. sound
E. bacteria
F. copper
Answers
Answer:
Air, Water, Bacteria, and Copper
Explanation:
air, water, bacteria, copper
Heat cannot be considered as an example of matter because heat is regarded as one of the energies that it's movement is as a result of temperatureSound cannot be considered as matter as well as light. Light can be considered as a propagation that occur through pressure wave and this is through a medium of particles, and sound is a wave, it is not considered a form of matter. Light and sound doesn't have mass as well as weight and Volume and both Light and sound doesn't occupies space and they are considered as not having area.Matter can be regarded as anything which is able to occupies space and that has mass
All physical objects can be considered as been composed of matter, The classical states of matter can be classified as: are solid or liquid or gasTherefore, the examples of matter matter among the given options are: air water, bacteria, copperLearn more at;
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