4. How is a lead storage battery recharged?
a. It is heated up.
b. The pressure on it is increased.
c. A direct current is applied to it.
d. A magnet is held close to it.
name three layers of our skin
Mars have more gravity than earth?
True or false?
Answer:
false
Explanation:
earth is larger than mars so it has more gravity
Answer: false
Explanation:
What is your observation of the relationship between m and a
Answer:
They are both letters?
Explanation:
HELPP!! I REALLY NEED TO BRING UP MY SCIENCE GRADE!!!!
Scientists studied the location of ____ to determine plate boundaries.
Answer:
Of earthquakes
Explanation:
1) Write the symbol and charge for each individual ion
2) Balance the charge so that they equal to zero
3)Write the formula based on how many of each ion you used in step 2
11) Beryllium and Phosphorus
12) cesium and Sulfur
13) Lithium and phosphorus
14) fluorine and rubidium
15) Francium and oxygen
Answer:
I'm pretty sure these are correct
11) Be 2+ and P 3- Formula is Be3P2
12) Cs 1+ and S 2- Formula: Cs2S
13) Li 1+ and P 3- Formula: Li3P
14) Rb 1+ and F 1- Formula: RbF
15) Fr 1+ and O 2- Formula: Fr2O
Explanation:
You do the criss-cross method where the charge on one ion becomes the amount on the second
SCIENCE
What is it called when two or more elements are brought together?
A. Solution.
B. Mixture.
C. Chemical reaction.
Answer:
C
chemical reaction .
Answer:
C
Explanation:
Chemical reaction.
28 grams of Al react with 30 Oxygen gas (O2) to produce Al Oxide (Al2O3). How many grams of Al Oxide will be produced
Answer:
58
Explanation:
Due to conservation of energy, the sum of the reactants = the sum of the products. So 28 + 30 = 58g
Find the mass of a person walking west at a speed of 0.8 m/s with momentum of 52.0 kg*m/s west.
Answer:
12 preguntas y no te sabes ni una sola valla el mundo se está acabando
Answer:
65 kg
Explanation:
m = p ÷ v
m= 52 ÷ 0.8
m = 65 kg
25.0 g Fe2CO3 reacts with 20.0 g CO in the reaction below. What is the limiting reactant and what best explains why is this reactant limiting?
Fe2CO3 + CO --> 2Fe + 2CO2
Answer:
In a chemical reaction, reactants that are not used up when the reaction is finished are called excess reagents. The reagent that is completely used up or reacted is called the limiting reagent, because its quantity limits the amount of products formed. It represents a reaction of a metal and a diatomic gas chlorine.
Which of these is incorrect
Answer:
B
Explanation:
Ne has 10 electrons.
so the first shell will takes 2 (10-2=8)
the second shell will take 8 (8-8=0)
37.5g of nitrogen reacts with 15.5 g of hydrogen. What mass of ammonia can be made? What is the limiting reactant?
Answer:
Limiting reactants or limiting reagents decide the amount of product formed and the amount of excess reagent used.
How can you prove that air is a matter ?
Answer:
One way to prove that air is made of matter is to blow up a balloon. Before you add air into the balloon, it is empty and shapeless. When you puff air into it, the balloon expands, so you know it is filled with something—air is taking up space. You'll also notice that a balloon filled with air sinks to the ground.
Explanation:
What is earth's crust mainly composed of
Answer:
The crust is made of solid rocks and minerals. Beneath the crust is the mantle, which is also mostly solid rocks and minerals, but punctuated by malleable areas of semi-solid magma. At the center of the Earth is a hot, dense metal core.
Explanation:
Answer:
The crust is made of solid rocks and minerals. Beneath the crust is the mantle, which is also mostly solid rocks and minerals, but punctuated by malleable areas of semi-solid magma.
What is a song that gets you in a mood? ;)
Answer:
Uhm- s-- money- feelings- die? But, slowed -w-
Explanation:
anyone know how to do this?
PLS HELP 6TH GRADE ITS ONE QUESTION ABOUT SCIENCE
Answer: The answer is C
Explanation:
Your answer would be C. :)
If you were standing on a beach during the day time, what direction might you feel a
breeze from? Explain why this happens.
Answer:
hi
Explanation:
if your standing in the beach for like in hour and then the temp will start to drop your body heating will start to go down to .
which of the following indicates the cathode rays has a large charge to mass ratio?
Answer:
Gggg
Explanation:
The indication of the cathode rays that has a large charge to mass ratio is there were deflected towards a positive electrode. The correct option is b.
What are cathode rays?Cathode rays are the rays that move through the negatively charged electrode the cathode charge to the positively charged electrode which is the anode charge in a vacuum tube.
These rays travel through a pipe in a straight line with speed when there is voltage is applied. They are also called electron beams. There is a cathode ray tube, CRT, which is a vacuum tube on which cathode rays travel.
So, the correct option will be for the cathode rays would be deflected towards a positive charge anode.
Therefore, the correct option is b, there were deflected towards a positive electrode.
To learn more about cathode rays, refer to the link:
https://brainly.com/question/13665271
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The question is incomplete. Your most probably complete question is given below:
They were easily deflected
There were deflected towards a positive electrode
They were deflected towards a negative electrode
They caused a fluorescent screen to glow
How are the atomic number and the number of protons related to each other?
Answer:
Neutral atoms of each element contain an equal number of protons and electrons. The number of protons determines an element's atomic number and is used to distinguish one element from another. ... Together, the number of protons and the number of neutrons determine an element's mass number.
Explanation:
A permanent alteration in the DNA sequence that makes up a gene is called am
Mutation
Germline
Meiosis
Evolution
Answer:
Gene mutation
Explanation:
A gene mutation is a permanent alteration in the DNA sequence that makes up a gene, such that the sequence differs from what is found in most people. Mutations range in size; they can affect anywhere from a single DNA building block base pair to a large segment of a chromosome that includes multiple genes
Practice Problem #2: How many atoms
of Ba are in 7.8 moles of Ba?
[tex]7.8 \: mol = \frac{6.02 \times {10}^{23} atoms}{1 \: mol} = 4.6956 \times {10}^{24} \: atoms[/tex]
round as you wish.
What is the volume at STP of 3.44 x 1023 molecules of CO2
gas?
a 25.1L
b 39.2 L
С
12.8 L
d 15.7 L
Answer:
C. 12.8 liters.
Explanation:
The Standard Temperature and Pressure (STP) of a gas are 273.15 K and 100 kilopascals. From Avogadro's Law, a mole of carbon dioxide contains [tex]6.022 \times 10^{23}[/tex] molecules. If we suppose that carbon dioxide behaves ideally, then the equation of state for ideal gas is:
[tex]P\cdot V = n\cdot R_{u}\cdot T[/tex] (1)
[tex]P\cdot V = \frac{r\cdot R_{u}\cdot T}{N_{A}}[/tex] (1b)
Where:
[tex]P[/tex] - Pressure, measured in pascals.
[tex]V[/tex] - Volume, measured in liters.
[tex]r[/tex] - Amount of molecules, no unit.
[tex]N_{A}[/tex] - Avogadro's number, no unit.
[tex]R_{u}[/tex] - Ideal gas constant, measured in pascal-liters per mole-Kelvin.
[tex]T[/tex] - Temperature, measured in Kelvin.
If we know that [tex]P = 100000\,Pa[/tex], [tex]r = 3.44\times 10^{23}[/tex], [tex]N_{A} = 6.022\times 10^{23}[/tex], [tex]T = 273.15\,K[/tex] and [tex]R_{u} = 8.314\times 10^{3}\,\frac{L\cdot Pa}{mol\cdot K}[/tex], then the volume of carbon dioxide at STP is:
[tex]V = \frac{r\cdot R_{u}\cdot T}{N_{A}\cdot P}[/tex]
[tex]V = \frac{(3.44\times 10^{23})\cdot \left(8.314\times 10^{3}\,\frac{L\cdot Pa}{mol\cdot K} \right)\cdot (273.15\,K)}{(6.022\times 10^{23})\cdot (100000\,Pa)}[/tex]
[tex]V = 12.972\,L[/tex]
Therefore, the correct answer is C.
What is the difference between a chemical symbol and a chemical formula?
Answer: A chemical symbol is a one- or two-letter designation of an element. Compounds are combinations of two or more elements. A chemical formula is an expression that shows the elements in a compound and the relative proportions of those elements. Many elements have symbols that derive from the Latin name for the element
The water cycle describes the movement of water on Earth. Water in oceans and lakes evaporates and turns into water vapor. This water vapor condenses and forms clouds which produce precipitation. Precipitation falls all over the Earth's surface. The water eventually comes back to the oceans through run-off. Which steps in the water cycle carry water out of an ocean and into a freshwater lake?
A. Evaporation and precipitation
B. Rivers and streams
C. Underground tunnels
D. Condensation and run-off
Answer:
c. Underground tunnels
Explanation:
Yes, water below your feet is moving all the time, but, no, if you have heard there are rivers flowing below ground, that is not true. Water moves underground downward and sideways, in great quantities, due to gravity and pressure. Eventually it emerges back to the land surface, into rivers, and into the oceans to keep the water cycle going.
Note: This section of the Water Science School discusses the Earth's "natural" water cycle without human interference.
The steps in the water cycle that carries water out of the ocean into a freshwater lake are rivers and streams.
What is the water cycle?The water cycle is used to describe the movement of water in the ecosystem. It involves the various processes through which water can move in the universe.
The steps in the water cycle that carries water out of the ocean into a freshwater lake are rivers and streams.
Learn more about water cycle:https://brainly.com/question/1151425
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Fill in the blank...
Each element is made up of only one kind of ________
What is the difference between fumarate and fumaric acid?
Answer:
the difference is fumaric acid the carboxylic acid groups are trans (E) and in maleic acid they are cis (Z)
Explanation:
and Fumarate is an intermediate in the citric acid cycle used by cells to produce energy in the form of adenosine triphosphate (ATP) from food
Name the element which has twice the number of electrons in its second shell as in the first shell write it's electronic configuration also.
Bill is experimenting with two simple machines. How will he know which
machine is more efficient?
O It will use less force to do the same amount of work.
O It will use more force to do the same amount of work.
O It will be lighter and stronger than the other simple machine.
It will not be possible to tell which simple machine is more efficient.
if an element number has a mass number of 244 and an atomic number of 94, how many neutrons does the element have