*sorry I can't give a full explanation.*
g = 9.8 m/s²
w = m*g
Weight of cat: 55 N = m*9.8
m = 5.61 kg
Weight of dog: 110 N = m*9.8
m = 11.22 kg
There is gravitational potential energy (GPE) acting on the cat since it's at the very top.
GPE of cat = m*g*h = 5.61*9.8*2 = 109.96 J
GPE of dog = m*g*h = 11.22*9.8*0 = 0 J (it's 0 m height because it's on the floor instead of in the tree)
But, if the dog was also 2 m up in the tree, its GPE would be 219.91 J.
As you can see, it's GRAVITATIONAL potential energy is bigger than the cat because it weighs more. Generally, if you were just trying to find the force which is w = m*g (since weight is a force), you would see that the bigger the mass, the bigger the force, and gravity stays the same.
Hope this helped
Which of the following is an example of a combustion reaction?
A) Mixing of an acid and base
B) Photosynthesis in plants
C) Lighting of a Matchstick
D) Reacting sodium and chlorine
Answer:
C) Lighting a matchstick
Explanation:
Mixing an acid and base will cause a neutralization reaction, a type of double displacement.
Photosynthesis is just a series of chemical reactions, but don't deal with the use of O2, but rather it's creation.
Reacting sodium and chlorine would make NaCl in a synthesis reaction.
Answer:
C) Lighting a matchstick
Explanation:
Arrange the following elements from lowest to highest ionization energy: Be, Mg, Ca, Rb, Sr
a. Be, Mg, Ca, Rb, Sr
b. Rb, Sr, Ca, Be, Mg
c. Rb, Sr, Ca, Mg, Be
d. Be, Mg, Ca, Sr, Rb
Answer:
It's (C)
Explanation:
I did research trust me I seached up the ionization energy of all of them, Be, Mg, Ca, Rb, and Sr
Since ionization energy decreases down the group and and increases across the period, the order from lowest to highest ionization energy is; Rb, Sr, Ca, Mg, Be.
In the periodic table, certain trends vary across the period and down the group. Trends like ionization energy increase across the period but decreases down the group.
Looking at the elements mentioned, the correct arrangement in order of the lowest to highest ionization energy is; Rb, Sr, Ca, Mg, Be.
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What is the molarity of a solution in which 2.34g of NaCl is dissolved in 54.2mL of water?
A.
2.52M
B.
0.739M
C.
0.0432M
D.
43.2M
Answer:
answer - b 0.739
Explanation:
I hope answer correctplease follow and like meWhen you are getting up for school in Texas, a student on the other side of earth is getting ready for bed what is the reason for this?
A) The moon revolves around earth
B) Earth rotates on its axis
C) The sun rotates on its axis
D) Earth revolves around the sun
Answer:
Its B
Explanation:
What parts of the eye are transparent and refract light? *
10 points
A. Retina and optic Nerve
B. Iris and pupil
C. Cornea and Lens
D. Lens and Optic Nerve
Answer:
Cornea
Lens
Retina
Explanation:
Brainliest?
A. What causes these H-bonds to form? (Hint: Look at the charged regions.)
Answer:
Hydrogen bonding is caused by the tendency of some atoms in molecules to attract electrons more than their accompanying atom. This gives the molecule a permanent dipole moment , it makes it polar, so it acts like a magnet and attracts the opposite end of other polar molecules.
Explanation:
The density of aluminum is 2.70 g/cm^3? How many aluminum atoms are in a block of aluminum
with a volume of 114.2 cm^3?
Answer:
68.77×10²³ atoms
Explanation:
Given data:
Density of Al = 2.70 g/cm³
Volume of Al block = 114.2 cm³
Number of atoms of Al = ?
Solution:
First of all we will determine the mass of Al.
D = m/v
2.70 g/cm³ = m/114.2 cm³
m = 2.70 g/cm³ × 114.2 cm³
m = 308.34 g
Now we will calculate the number of moles of Al.
Number of moles = mass/molar mass
Number of moles = 308.34 g/27 g/mol
Number of moles = 11.42 mol
Number of atoms of Al:
1 mole = 6.022×10²³ atoms
11.42 mol × 6.022×10²³ atoms/1 mol
68.77×10²³ atoms
pls help! no explanation needed
Which of these chemical equations describes an acid-base neutralization reaction?
1) 2Al(s) + 3H₂SO₄(aq) --> Al₂(SO₄)₃(aq) + 3H₂(g)
2) SO₂(g) + H₂O(l) --> H₂SO₃(g)
3) LiOH(aq) + HNO₃(aq) --> LiNO₃(aq) + H₂O(l)
4) CaBr₂(aq) + H₂SO₄(aq) --> CaSO₄(s) + 2HBr(g)
Answer:
Option 3.
LiOH(aq) + HNO₃(aq) —> LiNO₃(aq) + H₂O(l)
Explanation:
To know which option is correct, we must have an ideal of what is acid–base neutralization.
Neutralization is a reaction involving an acid and a base which produces salt and water only.
With the above information, we can easily detect the equation describing acid-base neutralization reaction by considering the products of each reaction to see the one that has water as part of the products.
From the question given above, only the 3rd equation gas water as part of the products i.e
LiOH(aq) + HNO₃(aq) —> LiNO₃(aq) + H₂O(l)
Hence, equation 3 is an acid-base neutralization reaction
Help meee :( if u help me i give u my love ):)
Answer:
1) carbon dioxide
Explanation:
what is the molecular formula of water
Answer:
your very f,k,n, d,u,m,b
Explanation:
Answer:
H2o
Explanation:
Water (chemical formula: H2O) is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms. As a chemical compound, a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds.
Briefly outline an experiment that could be done to determine if flame color is dependent on temperature. What would you expect the results to show?
Answer:
Flame color is dependent on temperature.
Explanation:
Scientists have learned from various experiments which shows that red flames occurs when the temperature reaches to 980º up to 1,800º Fahrenheit. The colour of flames turn orange when the temperature reaches to 2,000º up to 2,200º Fahrenheit and when the temperature approaches 2,400º to 2,700º Fahrenheit, flames colour turns white.
Definition: This is a measure of the quantity of matter.
Example: Yours may be 65 kilograms. You measure it with an analytical balance.
Answer:
Mass
:)
Explanation:
Answer:
Mass
Explanation:
the solubility of a gaseous solute _____ as the pressure on the solution ______
a. decreases, increases
b. increases, remains constant
c. increases, increases
d. increases, decreases
Answer:
B
Explanation:
How do you think dolphins find food in dark water, especially if
what they are looking for does not make any noise? What other
sense might they use to "see” without using their eyesight?
Answer: Dolphins use the sense (sound) to find food in dark water.
Explanation: Echolocation allows dolphins to “see" by interpreting the echoes of sound waves that bounce off of objects near them in the water. To echolocate objects nearby, dolphins produce high-frequency clicks. ... This information is critical for dolphins to find food and navigate in dark or murky waters.
40 Points Need help ASAP
Based on atomicity , how molecules are categorized
Answer:
On the basis of atomicity, molecules can be classified as : Monoatomic-composed of 1 atom e.g. He, Ne, Ar (all noble gases are monoatomic) Diatomic-composed of 2 atoms e.g. H2 , N2 , O. Triatomic-composed of 3 atoms e.g. O
Thank you and please rate me as brainliest as it will help me to level up
what example of matter is a mixture
Answer:
Most of the matter around us, however, consists of mixtures of pure substances. Air, wood, rocks and dirt are examples of such mixtures. Mixtures can be further classified as Homogeneous and Heterogeneous.
Electrolysis of water occurs according to the following equation...
2H20 ->2H2+O2
If electrolysis is performed with 100% efficiency on 100 grams of water. How many grams of hydrogen gas will be produced?
a. 11 grams
b. 50 grams
c. 4 grams
d. 100 grams
Answer:
11.1g
Explanation:
Given parameters:
Mass of water = 100g
Unknown:
Mass of hydrogen gas = ?
Solution:
We need to write the balanced reaction equation first and solve from the known to the unknown;
2H₂O → 2H₂ + O₂
Now, find the number of moles of the given specie;
Number of moles of H₂O = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of H₂O = 2(1) + 16 = 18g/mol
Number of moles = [tex]\frac{100}{18}[/tex] = 5.56mol
2 mole of water produced 2 mole of hydrogen gas;
5.56 mole of water will produce 5.56 mole of hydrogen gas
Mass of hydrogen gas = number of moles x molar mass
molar mass = 2(1) = 2g/mol
Mass of hydrogen gas = 2(5.56) = 11.1g
In the process of cooking, making tea, or mixing paint, you combined substances. Sometimes, the act of mixing substances results in the formation of new substances.
If two substances mix and one or more new substances form, a chemical change has occurred. Which event do you think results in a chemical change?
A.
Oil and vinegar mix to make salad dressing.
B.
Copper and zinc mix to make brass.
C.
Salt and water mix to make salt water.
D.
Sugar and water mix to make sugar water.
Answer:
B.
Copper and zinc mix to make brass.
Explanation:
This is the only answer in which a new substance is created, the rest of the choices are just mixtures
what type of ions have names ending in ide?
A. only cations
B. only anions
C. only metal ions
D. only gaseous ions
in the formation of silicon carbide represented by the chemical equation SiO2+3C-->SiC+2CO,8.0 mole of each reactant are available for the reaction. What substance is the limiting reactant?
The limiting reactant : C
Further explanationLimiting reactant : the smaller ratio from mol and their reaction coefficient
Reaction
SiO₂+3C⇒SiC+2CO
Reactants : SiO₂ and C
mol ratio
SiO₂ :[tex]\tt \dfrac{8}{1}=8[/tex]
C :[tex]\tt \dfrac{8}{3}[/tex]
[tex]\tt \dfrac{8}{3}<8\rightarrow C~as~limiting~reactant[/tex]
Which of Newton’s Laws is demonstrated by a larger truck requiring more force to accelerate than a smaller car?
Answer:
In your science class, you will learn about Newton’s laws of motion. Do you know why these laws are so important? When you throw a baseball or you bounce a basketball on the court, you can use Newton’s laws to explain the motion of the baseball or basketball. In fact, almost all motion in the world can be explained by these laws. Newton’s laws are useful when people design airplanes, trains, cars, sports equipment, toys, and many things that have to do with motion. Some people have trouble understanding Newton’s laws of motion because it’s hard to see how the laws work without any examples. One great way to understand these laws is to look at how they relate to cars in everyday life.
The First Law of Motion
“Every object persists in its state of rest or uniform motion in a straight line unless it is compelled to change that state by forces impressed upon it.”
Can you see why it’s hard for some people to understand the first law? Those are some complicated words. To help you to understand better, let’s break it down and use the example of a car. The first part deals with an object in a “state of rest”. This means that the object is not moving. When your mom or dad parks the car in the garage or the shopping mall, the car is said to be in a “state of rest” because it is not moving. The car will not move until the engine is started and somebody drives it away. The second part deals with an object in “uniform motion”. This means that the object is moving at the same speed. When you mom or dad is using “cruise control” on a highway at 60 miles per hour, the car will be moving at that speed in a “straight line” until something happens to change it. What is this change? It depends. By using the brakes, your mom or dad can slow the car down or bring it to a stop. On the other hand, the car’s direction will be changed if it is hit by another motor vehicle.Explanation:
It takes of heat to raise the temperature of Object A by , and to raise the temperature of Object B by . Suppose A and B are brought into contact. A is initially hotter. A is seen to cool down by . How would you calculate the rise in temperature of B? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.
Hi, the given question is incomplete, the complete question is:
It takes 4.37 J of heat to raise the temperature of Object A by 1°C, and 2.88 J to raise the temperature of Object B by 1°C. Suppose A and B are brought into contact. A is initially hotter. A is seen to cool down by 6.3°C . How would you calculate the rise in temperature of B?
Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.
Answer:
The correct answer is 9.56 degree C.
Explanation:
Based on the given information, the given object A is initially hotter than object B, and the direct contact between them permits the transfer of heat between them. Based on the law of conservation of energy, the energy cannot be created nor be destroyed. In the given case, the energy, which is lost from object A can only be gained by object B.
Let us consider that both the objects exhibits equal mass, now in order to determine the transfer of energy between them there is a need to multiply the heat capacity with the temperatures. Therefore,
Energy lost by object A = Energy gained by object B
Heat capacity of object A × Temperature lost by object A = Heat capacity of object B × Temperature gained by object B
4.37 J/°C × 6.3 °C = 2.88 J × Tb
Tb = (4.37 J/°C × 6.3° C) / 2.88 J
Tb = 9.56 °C
SiS2 is a _____ compound
Answer:
SiS2, silicone disulfide, is a linear, nonpolar compound.
4. Biowing a balloon is a physical and reversible change. When the balloon bursts, it is also a
physical change. Give more examples of physical change.
5. Torji blows air into a red balloon and then squeezes out the air from it. Explain why it is a
physical change.
guys plz help me
Answer: blowing a balloon is a physical change as when you blow a balloon the balloon expands but the balloon remains a balloon .there is change in Blowing a balloon is a physical change because only the size of the balloon changes , no change in chemical properties of the balloon occurs (no new substance is formed).
Explanation:
The temperature of 25.0 g of aluminum increases 10.0C when 222.5J of energy is added. What is the specific heat of aluminum?
Answer:
0.890J/gC
Explanation:
H=mcDeltaT --> c=H/mDeltaT
c= 222.5J/(25.0)(10.0)
222.5/250
0.890J/gC
Determine the bond type formed between Hg and F
a
Covalent
b
Simple Ionic
c
Multivalent Ionic
Answer:
Multivalent Ionic
Explanation:
The type of bond formed between the atoms of two elements can easily be deduced from the magnitude of electronegativity difference between the two bonding atoms.
A summary of electronegativity differences and corresponding types of bonds are shown below as adapted from chemlibretexts, where Δχ is the difference in electronegativity ;
ionic if Δχ ≥ 2.0
polar if 2.0 > Δχ > 0.5
nonpolar if 0.5 > Δχ
To determine the type of bond between Hg and F. Hg has an electronegativity of 2 while F has an electronegativity of 4. the difference in electronegativity (Δχ) is 4 - 2 = 2
This corresponds to a multivalent ionic bond because mercurous ion is the
Hg2^2+ ion and this leads to the formation of Hg2X2 (mercury I fluoride).
What type of heat transfer happens when warm air in
your living rises from the heater to the ceiling?
1. Radiation 2. Conduction 3. Convection
Answer:
the answer is radiation
Explain how fossil evidence is evidence of plate tectonics.
Answer:
Answer
Explanation:
Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed. ... This distribution of fossils led to theories that the southern continents were once joined in a supercontinent called Gondwana.
Answer: Evidence from fossils, glaciers, and complementary coastlines helps reveal how the plates once fit together. Fossils tell us when and where plants and animals once existed.
Explanation: I hoped that helped plzz mark as brainliest !!
in the cycle shown is mantle made of silicate rocks?why?
answer;
Yes,because the mantle under the crust is about 1800miles deep (2890km).It is composed mostly of SILICATE ROCKS in magnesium and iron.
or
Yes, because it is composed mostly of SILICATE ROCKS in magnesium and iron.
beginner hereee!
Answer: yes,because it is composed mostly of SILICATE ROCKS in magnesium and iron
Explanation:
The rocks that is present in Earth's mantle are mostly silicates due to the presence of high amount of silicon.
Silicates is a compound that is made up of a silicon and oxygen atoms. The mantle is made up of 44.8% oxygen, 21.5% silicon, and 22.8% magnesium by composition.
The most common compound that present is Silicon dioxide (SiO2) in the concentration of 48%, followed by Magnesium Oxide (MgO) at the concentration of 37.8%. Olivine, pyroxenes, spinel, and garnet are the types of rocks that is found in mantle.
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