OkSpeed is still the most common factor in fatal road accidents, ... a few kilometres per hour above the speed limit greatly increases the risk of an ... For a car travelling at 70 km/h the risk increased fourfold. ... where Vf is the final velocity, V0 is the initial velocity, a is the rate of deceleration and d is the distance ...
Missing: 240 | Must include: 240
A cinder block is sitting on a platform 20 m high. It weighs 79 N. The block has ____________ energy.
A. Kinetic
B. Potential
Answer:kinetic
Explanation:
Thank
Answer:
B.
Explanation:
The block has potential energy.
EXTRA POINTS!
Which organism has Ganglia?
A: Sponge
B: fish
C: hydra
D: flatworm
Answer:
flatworm
Explanation:
Answer:
D.) Flatworm
Explanation:
Took the test :)
The specific heat of water and steam (water vapor) are 4.18
J/gºC and 2.10 J/gºC respectively. Heating a 74.0 g sample of
water from 88.3 °C to water vapor at 112.5 °C requires 172.58 kJ
of heat. Calculate the heat of vaporization of water in kJ/g.
Assume the boiling point of water is 100 °C.
please help
Answer: 2.26
Explanation:
The heat of the vaporization of water is equal to 2.33 KJ/g.
What is the specific heat capacity?The specific heat capacity can be explained as the quantity of heat required to raise the temperature in one unit of substance by 1 degree Celcius.
The specific heat can be represented in terms of gained or lost heat:
Q = mCΔT
The heat of vaporization can be described as the amount of heat required to turn one gram of a liquid into a vapor, without an increase in the temperature of the liquid.
Given, the amount of heat gained by water, Q = 172.58 kJ
The change in the temperature = 112.5 - 88.3 = 24.2 °C
The specific heat capacity of the water = 4.184 J/g°C
The mass of the water, m = 74 g
The heat of vaporization of water H = q/m
H = 172.58/74
H = 2.33 KJ/g
Therefore, the heat of the vaporization of water is equal to 2.33 KJ/g.
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True or False: Natural selection doesn't happen anymore.
Liquid Nitrogen’s temperature is minus what degress
Answer:
-320f
Explanation:
How is energy sent from Earth to space?
conduction and convection
radiation and conduction
reflection and conduction
radiation and reflection
Answer:
radiation and reflection
Explanation:
Energy is send from space to earth by radiation and reflection. The most predominant way in which heat is transferred from earth to space is by radiation.
The source of energy for the earth is heat from the sun. This heat can be sent back to space when they are reflected back from the earth and radiated into space.Answer:
radiation and reflection
hope helps you
have a nice day
The Electron Affinity(EA) tends to _________ as the atomic number increases In any group.
a.)increase
b.)decrease
:) thank uuu
Answer:
decrease
Explanation:
Neutrons do not affect the overall charge of the atom.
True or false
Neutrons do not carry an electrical charge so adding or removing them from the nucleus does not change the electrical charge of the nucleus.
So your answer is true
can i get some help with this
Answer:
Velocity
Explanation:
Velocity is a vector quantity that mentions the direction of the object(north, south, etc..) speed is not a vector quantity.
I think this is the answer, I hope this helps!
Al colocar unos trocitos de zinc en un tubo de ensayo, agregamos 2 mL de acido clorhídrico. El Zinc sustituye el hidrogeno del acido para formar una sal (ZnCl2) con el cloro Zn+2HCl-- ZnCl2 +H2 El nombre correcto de esta sal en la nomenclatura sistemática es
Answer:
DICLORURO DE ZINC
Explanation:
La ecuación es:
Zn (s) + 2HCl (aq) → ZnCl₂ (aq) +H₂ (g)
El zinc reacciona en una reacción redox con el acido clorhídrico para formar una sal y liberar el hidrogeno gaseoso.
Se trata de una reacción redox porque el hidrógeno se reduce (disminuye el numero de oxidación, de -1 a 0, en su estado fundamental), mientras que el Zn se oxida (el numero de oxidación aumenta de 0 a +2).
Como la sal se forma con dos atomos de cloro, se denomina dicloruro por lo que el nombre correcto de la sal en nomenclatura sistemática es:
- DICLORURO DE ZINC
WILL GIVE BRAINLIEST A student heated some matter, which caused some of its properties to
change. A change in which two properties would indicate that the matter
underwent a chemical reaction?
A. State
B. Temperature
C. Melting point
D. Color
Answer:
Color and Melting Point
Answer:
Explanation:
Color melting point
How many moles of nitrogen dioxide gas will be produced if 25.0 ml of 2M nitric acid react?
Cu + HNO3 = Cu(NO3)2 + NO2 + H2O
Answer:
0.025 moles of NO₂ will produced
Explanation:
Given data:
Moles of NO₂ formed = ?
Volume of HNO₃ = 25.0 mL
Molarity of HNO₃ = 2 M
Solution:
Chemical equation:
Cu + 4HNO₃ → Cu(NO₃)₂ + 2NO₂ + 2H₂O
Number of moles of HNO₃:
Molarity = number of moles / volume in L
2M = number of moles / 0.025 L
Number of moles = 2 M × 0.025 L
Number of moles = 0.05 mol
Now we will compare the moles of HNO₃ with NO₂ from balance chemical equation.
HNO₃ : NO₂
4 : 2
0.05 : 2/4×0.05 =0.025
0.025 moles of NO₂ will produced.
Zinc metal reacts with copper sulfate through the following
reaction:
Zn + CuSO4 → Cu + ZnSO4
The percent yield for a reaction in which 32.5 g of Zn is
reacted in excess CuSO4 solution is 85.0 %. What is the
actual yield of copper of this reaction?
g
Your answer should be rounded to three significant figures. Do not include
units in your answer.
Answer:
26.9
Explanation:
Help! Please will give brainliest for right answer!
Answer:
a positive nucleus gets smaller the negative electrons are attached closer in
Explanation:
question.
Which of the following events must occur at point 6 in order to transform sedimentary rock into igneous rock?
A
Shifting tectonic plates push the sedimentary rock toward the poles, where it freezes and hardens into igneous rock.
B
Extreme winds and storms weather the sedimentary rock into particles, which collect in rivers and are compacted into igneous rock.
C
Rising oceans erode mountains of sedimentary rock into particles, which sink and get compacted into layers that form igneous rock.
D
Tectonic plates push against each other, driving sedimentary rock under Earth's surface, where it melts into magma and turns into igneous rock as it cools
Answer:
I belive the answer is D
What classification should this reaction have? CaC12 + F2 = CaF2 + CI2
Answer:
Single-Replacement Reaction
General Formulas and Concepts:
Types of Reactions
Synthesis Reactions: A + B → AB Decomposition Reactions: AB → A + B Single-Replacement Reactions: A + BC → AB + C Double-Replacement Reactions: AB + CD → AD + BCExplanation:
Step 1: Define reaction
CaCl₂ + F₂ → CaF₂ + Cl₂
Step 2: Identify backplate
Single-Replacement Reactions: A + BC → AB + C
BC = CaCl₂
A = F₂
AB = CaF₂
C = Cl₂
Want brainlyest? come and answer this "question"!
What are chemical formulas? Give an example of a chemical formula.
The number of compounds possible are limited by what three factors?
Which individual elements make up the following common compounds?
CaCO3
CaCl2
C3H6O
HCl
Ca(OH)2
Answer: A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound. here's an example Acetic acid formula CH3COOH. the compound factors it is The electron affinity or the ionising potential. here are elements of making compounds CaCo3 is a Calcium and a carbonate CaCl2 is a calcium and a chlorine
C3H60 is three Calcium’s and 60 hydrogens
HCL is one hydrogen and a chlorine
Ca(OH)2 is one calcium and two hydroxides (OH-).
Explanation: I hope that was helpful !
1 Compressing a spring increases its
A kinetic energy
B potential energy
C electrical energy
D chemical energy
Please help immediately this is a question on my test. <3
(Science)
Answer:
Potential Energy
Explanation:
By compressing the spring there is more potential energy.
A gas sample is made entirely of carbon dioxide and water, and there are 300 moles of CO2 and 500 moles of H2O. If the total pressure of the sample is 21 atm, what is the partial pressure of H2O ? Ptotal = Pa + Pb+ Pc....... Pa = Xa(Ptotal)
Answer:
Explanation:
Total moles = 300 + 500 = 800 moles
mole fraction of carbon dioxide = 300 / 800 = 3 / 8
water = 500 / 800 = 5 / 8
Total pressure = 21 atm
partial pressure of water = total pressure x mole fraction of water
= 21 x 5 / 8
= 13.125 atm
plz help with this........
ITS [tex]C_{4}H_{10}[/tex] AND [tex]C_{5}H_{12}[/tex]
_____________________________________GENERAL FORMULA OF ALKANE [tex]C_{n}H_{2n+2}[/tex]Where n is the number of CARBONS
_____________________________________A)
By using the General Formula of Alkanes having 4 carbon atoms is
[tex]C_{4}H_{2x4+2}[/tex]
[tex]C_{4}H_{10}[/tex]
C)
By using the General Formula of Alkanes having 5 carbon atoms is
[tex]C_{5}H_{2x5+2}[/tex]
[tex]C_{5}H_{12}[/tex]
_____________________________________IF YOU USE THE SAME FORMULA FOR THE OTHER TWO OPTIONS THE OUTCOME WILL NOT BE AS SAME AS GIVEN IN THE QUESTION SO THOSE TWO ARE CAN NOT BE OUR ANSWER
_____________________________________HOPE THIS HELPS!
What are the parts of the earths mantle? A) Inner core, asthensophere, lithosphere
B) lithosphere, asthenosphere, mesosphere
C) crust, lithosphere, asthenosphere
D) mesosphere, asthenosphere, troposphere
Answer:
B
Explanation:
The mantle is composed of the mesosphere and the asthenosphere in the upper most part and in the crust is the lithosphere
what components of blood can be examined
5. You encounter a material that is white, powdery, with a low melting point, and no luster.
Is this material likely to be made of a metal or a nonmetal? Justify your answer. (5 pts)
Other than identifying a target for gene therapy, how does identifying a disease-causing mutation help a patient and their family?
Explanation:
Because if the family has the same disease and DNA then the cure will be compatible.
Which tool would be best to allow you to make observations of an object's color and texture?
A Digital Camera
B Balance Scale
C Graduated Cylinder
D Digital Thermonter
Answer:
A digital camera. You can zoom and all that stuff and see individual pixels when close up. Also none of the other options would make sense.
Explanation:
write the name of and molecular formula of compound which gives hydrogen ion and chloride ion in the solution state. in which colour is the methyl orange changed after treating it with this compound. why? write the name of salt when the compound is treated with lime water. write the chemical equation.
2H2S + 3O2 → 2SO2 + 2H2O
1. For every 10.0 g of H2S how many moles of SO2 are formed?
Answer:10
Explanation:
Why is aspirin sometimes buffered? Will give brainliest.
Answer: the aspirin also contains a buffering agent—usually MgO—that regulates the acidity of the aspirin to minimize its acidic side effects.
Explanation:
Because the acid residences of aspirin may be complex, many aspirin manufacturers provide a "buffered aspirin" form of the drug. In these cases, the aspirin additionally includes a buffering agent-normally MgO-that regulates the acidity of the aspirin to minimize its acidic aspect consequences.
Why may a buffer be added to aspirin?Buffering agents are utilized in tablet formulations to grow the dissolution and absorption of vulnerable acid pills together with salicylic acid, aspirin, and p-aminosalicylic acid as well as to lower gastric infection of lively ingredients.
Why is buffered aspirin not a buffer?So-called "buffered aspirin" isn't surely a buffer, because it does no longer face up to acids and bases. it's miles sincerely aspirin mixed with a primary compound, consisting of magnesium carbonate or aluminum hydroxide, which neutralizes some belly acid.
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How do you changes in the environment affect species extinction?
Answer:
Climate change leads to a loss of species
With these changes, species have to adapt to new climate patterns (variations in rainfall; longer, warmer summers etc). ... The consequences include habitat loss; shifts in climatic conditions and in habitats that surpass migrational capabilities; altered competitive relationships.
Explanation:
Thank you
Phillip throws a basketball up in the air and through a hoop. Because the ball is acted on by the force of gravity, the ball will —
Answer:
Fal down to the flour
Explanation:
Because of gravity their is weight that weight keeps us down to earth everything has weight even a leaf not only weight but the atmosphere is like a wall that keeps us safe from all the stuff in space.
