4.
Janet has four identical containers. In each container there are 200 grams of a
different colored sand, as shown below. All the sand is at the same temperature
and has the same grain size.
White
Pink
Brown
Black
Janet leaves the containers out in the full sun for three hours. Then she measures
the temperature of the sand in each container. Her results are shown below.
White Pink Brown Black
22°C 28°C 41°C 45°C
Explain why the temperature of the sand in each container is different.
Answers
The temperature of the sand in each container is affected by both the color of the sand and the properties of the container.
The temperature of the sand in each container is different because of the varying colors of the sand. The darker colored sand, such as the black and brown sand, absorbs more heat from the sun than the lighter colored sand, such as the white and pink sand. This is due to the fact that darker colors absorb more light and heat than lighter colors. As a result, the sand in the containers with black and brown sand heats up faster and to a higher temperature than the sand in the containers with white and pink sand. Additionally, the containers themselves may also play a role in the temperature differences. For example, a container with a darker color or material may absorb more heat from the sun than a container with a lighter color or material.
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Related Questions
Consider a gas in a container that can adjust its volume to maintain constant pressure. Suppose the gas is cooled. What happens to the gas particles with the decrease in temperature? What happens to the volume of the container?
Answers
Answer:
The volume will also decrease.
Explanation:
This illustration clearly indicates Boyle's law.
Boyle's law states that the volume of a fixed mass of gas is directly proportional to the absolute temperature, provided the pressure remains constant. Mathematically, it is represented as:
V & T
V = KT
K = V/T
V1/T1 = V2/T2 =... = Vn/Tn
Where:
T1 and T2 are the initial and final temperature respectively, measured in Kelvin.
V1 and V2 are the initial and final volume of the gas respectively.
From the illustration above, the volume is directly proportional to the temperature. This implies that as the temperature increases, the volume will also increase and as the temperature decreases, the volume also will decrease.
28. Which of the following reactions at equilibrium would NOT be affected by volume
changes at constant temperature?
a. 2 CO(g) + O2(e) < > 2 CO2(g)
b. 2 NO2(g) → N2048)
c. 2 NO(g) + 3 F2(g) → 2 F3NO(e)
d. O3(e) + NO(g) + > NOzle) +
e. None of the above.
Ozig)
Answers
Answer:
Explanation:
is the
in a hypothetical nuclear decay process for an atom, the mass of one proton is transformed into energy. which option gives the best estimate for the amount of energy released in the process?
Answers
The best estimate for the amount of energy released in this hypothetical nuclear decay process is approximately 1.503 x 10^-10 joules.
The amount of energy released in a nuclear decay process can be calculated using Einstein's famous equation:
E = mc^2
where E is the energy released, m is the mass that is transformed, and c is the speed of light.
In this hypothetical nuclear decay process, the mass of one proton is transformed into energy. The mass of a proton is approximately 1.0073 atomic mass units (amu) or 1.6726 x 10^-27 kg. Using this value for m, and the speed of light, c = 299,792,458 m/s, we can calculate the energy released:
E = (1.6726 x 10^-27 kg) x (299,792,458 m/s)^2
E = 1.503 x 10^-10 joules
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how many grams of aluminum chloride are produced when aluminum reacts with 18.0 grams of hydrochloric acid to produce aluminum chloride and hydrogen gas?
Answers
There 88.94 grams would be grams of aluminum chloride are produced when aluminum reacts with 18.0 grams of hydrochloric acid to produce aluminum chloride and hydrogen gas.
To calculate aluminum chloride that are produce first we should write the balance reaction
2Al + 6HCl → 2AlCl₃ + 3H₂,
Then we can calculate the moles of aluminum
Moles aluminum = mass/ mass molar
Moles aluminum = 18 grams / 27 grams / moles
Moles aluminum = 0.667 moles
Form the reaction, it is clear that 2.0 moles of Al react with 6.0 mole of HCl to produce 2.0 moles of AlCl₃ and 3.0 mole of H₂.
using unitary method we can calculate the moles of Aluminum chloride
moles AlCl₃ = 2/2 x mole Al
Moles AlCl₃ = 2/2 x 0.667 moles =0.667 moles
Mass AlCl₃ = moles x mass molar
Mass AlCl₃ = 0.667 moles x 133.34 g/mol
Mass AlCl₃ = 88.94 grams
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is the ketone in carvone classified as aliphatic, conjugated, or aromatic?
Answers
Carvone is a naturally occurring organic compound that can exist in two different isomeric forms: (R)-(+)-carvone and (S)-(-)-carvone. It is commonly found in essential oils from plants such as caraway, spearmint, and dill.
To determine whether the ketone in carvone is classified as aliphatic, conjugated, or aromatic, we first need to understand what these terms mean.
- Aliphatic compounds are organic molecules that contain carbon and hydrogen atoms connected in straight or branched chains or non-aromatic rings. They can be either saturated (having only single bonds between the carbon atoms) or unsaturated (having one or more double or triple bonds between the carbon atoms).
- Conjugated compounds are molecules that contain alternating double and single bonds, which create a system of delocalized pi electrons along the chain. This can affect the physical and chemical properties of the compound, making it more stable and reactive than non-conjugated compounds.
- Aromatic compounds are organic molecules that contain a cyclic arrangement of atoms with alternating double and single bonds, forming a planar ring structure known as an aromatic ring. These compounds are characterized by their strong and distinctive odors and are often used in perfumes, flavorings, and other applications.
Based on these structural features, we can conclude that the ketone in carvone is neither conjugated nor aromatic. It is also not a straight or branched chain, so it cannot be classified as aliphatic. Instead, it is part of a cyclic structure that does not fit neatly into any of these categories.
In summary, the ketone in carvone is not aliphatic, conjugated, or aromatic. It is part of a unique cyclic structure that contributes to the distinctive properties and functions of this natural compound.
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CAN SOMEOME GIVE ME AN EXAMPLE OF
NEWTON'S 1ST LAW: AN OBJECT IN MOTION STAY IN MOTION
AN OBJECT AT REST STAYS AT REST.
UNLESS ACTED UPON BY AN OUTSIDE OR UNBALANCED
Answers
Answer:
- A ball does not move unlesss you kick it and it rolls aways
- a car stays still and is not in motion, unless you start the engine
- a pencil stays still on a table, it moves when you pick it up off the table
Explanation:
: H2SO3, as you might expect, is a diprotic acid with K.1 -1.54x10-2 and K2=1.02x107. Would you expect an aqueous solution of NaHSO3 to be acidic, basic or neutral? acidic basic neutral
Answers
An aqueous solution of NaHSO3 (sodium bisulfite) would be acidic.
NaHSO3 is a salt formed by the partial neutralization of a weak acid (H2SO3) with a strong base (NaOH). In this case, H2SO3 is a diprotic acid, meaning it can donate two protons (H+ ions) in separate steps.
When NaHSO3 dissolves in water, it dissociates into sodium ions (Na+) and the bisulfite ion (HSO3-). The bisulfite ion can further react with water to release H+ ions:
HSO3- + H2O ⇌ H2SO3 + OH-
The equilibrium favors the formation of H2SO3 and H+ ions, making the solution acidic. The presence of H+ ions results in a lower pH, indicating acidity.
Therefore, an aqueous solution of NaHSO3 would be acidic.
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present the cell in which the following reaction place
Mg(s) + 2Ag+ (0.0001 M) ----> Mg2+ (0.130M) + 2Ag(s)
calculate its E if E∅ is 3.17 V
Answers
\(\Huge{\green}\fcolorbox{blue}{cyan}{\bf{\underline{\red{\color{red}Answer}}}}\)
2.96V
Explanation:
\( \sf Mg(s) + 2 {Ag}^{ + } (0.0001M) \longrightarrow {Mg}^{2 + } (0.130M) + 2Ag(s) \\ \\ \sf E{ \degree} = 3.17V\)
As per the Nerest equation
\( \sf E_{cell} = E_{cell}{ \degree} - \frac{2.303RT}{nF} log \frac{ [M]}{ [{M}^{n + }] } \\ \\ \sf E_{cell} = E_{cell}{ \degree} - \frac{0.0592}{n} log \frac{[M]}{[ {M}^{n + } ]} \)
Here n = 2
at the n depicts the number of electrons
M = Mg as it is neutral after the product
while M+ = Ag2+ as it is positively charge after the product
\( \implies \sf E =3.17 - \frac{0.0592}{2} log \frac{[Mg]}{ {[{Ag}^{ + }]}^{2} } \\ \\ \sf \implies E = 3.17 - 0.0292 log[ \frac{0.130}{ {10}^{ - 8} } ] \\ \\ \sf \implies E = 3.17 - 0.0292 log[130 \times {10}^{5} ] \\ \\ \sf \implies E = 3.17 - 0.0292 \times 7.11 \\ \\ \sf \implies E = 3.17 - 0.2076 \\ \\ \sf \boxed {\pink \implies \pink{E = 2.96V}}\)
The number of moles of Cl - ions needed to combine completely with 0.25 mole of Mg 2 ions is: 0.125 0.75 0.25 0.50
Answers
Answer:
The answer is 0.50
Explanation:
When naming acids, the term “hydro” is used then there are or are not (pick the correct one) any oxygens.
Answers
Answer:
There are no oxygen
Explanation:
Hydro is used when naming hydrogen compound and oxo is used when naming oxygen compound
which of the following elements has lowest inoization energy -He-F-Rb-C-Na
Answers
One way of which element has the lowest or highest ionization energy is by looking at the periodic table. The periodic table has many properties possible to be understood, one of which is ionization energy, which is the ability of an element to make ions, becoming more reduced (gain electrons) and making another atom become more oxidized (lose electrons), the trend of ionization energy in the periodic table follow the directions up and right, so if the atom if in the far right of the periodic table, this means that this atom has a high ionization energy, and from the given options the one with the higher ionization energy will be Fluorine, answer letter B
What will be the [OH-], [H3O], pH and pOH of a 0. 025 M weak acid olution? (pKA= 4. 615)
Answers
The [OH-] of the 0.025 M weak acid solution will be equal to the pKA of the acid, 4.615.
What is weak acid solution?
A weak acid solution is a solution that contains an acid that is not completely ionized in water. Weak acids, such as acetic acid, have pH values between 4.5 and 6.0. These acids are not strong enough to completely break apart in water, leaving some of the molecules still intact. Because of this, weak acids form molecules that can react with other molecules, such as bases, in solution.
This is because the equilibrium of the acid dissociation reaction is reached with the same concentration of acid and its conjugate base in solution. The [H3O] will be equal to 0.025 M, as the acid is in dissociation equilibrium with its conjugate base. The pH of the solution can be calculated by taking the negative log of the [H3O], which will be 1.59. The pOH can be calculated by taking the negative log of the [OH-], which will be 4.615.
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Please answer it in 1 hour Write explanation if it needed I’ll give you upvote immediately Don’t use excel to solve this question i In a bond amortization schedule, what does the book value mean?Describe in words. (ii) Consider a n-period coupon bond where the redemption amount, C may not be the same as the face amount, F. Using j and g to represent the yield rate per period and modified coupon rate per period respectively, show that,for k = 01,2,n, the book value at time k,B is B=C+Cg-jan-kj and the amortized amount at time k is ii Let K = Cu. The Makeham formula to compute the price of a bond is given by A verbal interpretation for K would be that K is the present value of the redemption value C.Provide a verbal interpretation for(C-K)
Answers
Answer:
(i) In a bond amortization schedule, the book value represents the remaining amount of the bond principal that hasn't been paid off at a given point in time. When a bond is first issued, its book value equals its face value. As payments are made over the life of the bond, a portion of these payments reduces the book value. By the end of the bond's life, its book value will be zero, as the entire principal will have been paid off.
(ii) The formula for the book value B at time k, where k is the number of periods elapsed, is B = C + Cg - jan-kj.
Here:
- C is the redemption amount,
- g is the modified coupon rate per period,
- j is the yield rate per period, and
- a_n-kj is the present value of an annuity immediate with n - k periods at the yield rate j.
This formula states that the book value at any time k is the redemption amount plus the present value of the future coupon payments (Cg), minus the present value of the annuity that represents the repayments of the bond (jan-kj).
The amortized amount at time k is the change in the book value from time k-1 to time k, plus the coupon payment at time k. It represents the portion of the bond's principal (and interest) that has been repaid up to time k.
(iii) If K is defined as the present value of the redemption value C, according to the Makeham formula, (C-K) would represent the difference between the redemption value of the bond and its present value. This difference is the amount of interest that will accumulate over the life of the bond. In other words, (C-K) can be interpreted as the total interest that the bondholder will earn from holding the bond until redemption, assuming that all coupon payments are reinvested at the yield rate j.
Explanation:
How many kinds of horses are there in the world? Give me a real number, plz its for a magazine article!
Answers
Answer:
784
Explanation:
Answer:
784 horse breeds
Which of the following is most likely a solid that is not a good conductor of electricity? A. Nickel B. Sodium C. Silicon D. Fluorine
Answers
Answer:
Option D: Fluorine
Explanation:
From the periodic table, Nickel and Sodium are metals. Which means that they are good conductors of electricity.
While silicon is a metalloid. A metalloid has properties of both metals and nonmetals. Thus, it has tendencies to conduct electricity.
Fluorine is a non - metal which means that it doesn't conduct electricity.
Thus, the most likely that is not a good conductor is Fluorine.
Humans have developed ways to increase the of their
environment. true or false
Answers
Answer:
True......................had to do this because we need atleast 20 letters
Electrolysis is performed upon molten MgCl2. platinum electrodes are used. (a) write the cathode and anode half reactions
Answers
Electrolysis occur when an electric current is passed through a liquid or solution thereby causing the decomposition of chemicals.
For magnesium chloride, it will be heated to be able to conduct electricity. When molten, the MgCl2 will decomposes into Mg2+ and 2Cl- ions. During electrolysis, the elements are separated according to the equations;
\(\begin{gathered} Mg^{2+}+2e^-\rightarrow Mg(s) \\ 2Cl^-\rightarrow Cl_2(g) \end{gathered}\)According to the half reactions, the Mg2+ is reduced at the cathode (-) and the Cl- is oxidized at the anode (+). Reduction at the cathode shows that magnesium gains two electrons to form a magnesium solid while the chlorine ion looses two electrons at the anode
Calcium carbonate, CaCO3(s), decomposes upon heating to give CaO(s) and CO2(g). A sample of CaCO3 is decomposed, and carbon dioxide is collected in a 250 mL flask. After decomposition is complete, the gas has a pressure of 1.3 atm at a temperature of 31 degrees Celsius. How many moles of CO2 gas were generated?
Answers
The moles of CO₂ gas was generated at 0.01302 mol.
The Ideal Gas Law equation can be used for calculating the moles.
PV = nRT
n = PV/RT
Where:
P = pressure = 1.3 atm
V = volume = 250 mL = 0.25 L
n = number of moles of CO₂ gas
R = ideal gas constant = 0.0821 L·atm/mol·K
T = temperature in Kelvin = (31 + 273) K = 304 K
Substituting the values in the above equation.
n = (1.3 atm)(0.25 L) / (0.0821 L·atm/mol·K)(304 K)
n = 0.01302 mol CO₂ gas
Therefore, 0.0152 moles of CO₂ gas were generated.
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Look at the equation for a displacement reaction below. What lost electrons in the reaction? Give the full name, not the symbols.
Answers
Answer:
Cupric ions
Explanation:
In the single displacement reaction shown, the cupric ions lost two electrons.
Cu²⁺ + 2e⁻ → Cu
The replacement of a metallic ion in solution by a metal atom higher in the activity series than than the metal in solution falls into this category of reactions.
Since Zn higher in the series, it displacements the cupric ions.
Answer: copper or copper ion
Explanation: The copper ions (Cu2+) gained 2 electrons to form copper atoms.
What are the products of the acid hydrolysis of an ester?
Answers
The products of the acid hydrolysis of ester are carboxylic acid and alcohol.
Acid hydrolysis of estersAcid hydrolysis of esters involves heating esters in a large excess of water in the presence of a strong acid catalyst. The products of such reactions are carboxylic acid and alcohol as shown in the below example.
\(CH_3COO(CH_2)_3CH_3 + H_2O --- > C_4H_9OH + CH_3CO_2H\)
Acid hydrolysis of esters is the reverse of the esterification process. During ester formation or esterification, carboxylic acids and alcohols react to produce ester and water as follows:
\(C_4H_9OH + CH_3CO_2H-- > CH_3COO(CH_2)_3CH_3 + H_2O\)
Thus, acid hydrolysis of esters is a reversible reaction that does not go into completion ordinarily.
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What does the term "climate change" refer to?
Answers
What is responsible for an inherited trait? a. Environment b. Cells C. Dna d. Nutrition
Answers
Answer:DNA
Explanation:Dna
I need help 7th grade science
Answers
Answer:
a flowing stream
Explanation:
.........
what is the coordination number around the central metal atom in ammonium diaquabis(oxalato)nickelate(ii) ((nh₄)₂[ni(c₂o₄)₂(h₂o)₂])?
Answers
The coordination number around the central metal atom in ammonium diaquabis(oxalato)nickelate(II) is 6.
In the given compound, ammonium diaquabis(oxalato)nickelate(II), the nickel (Ni) ion is the central metal atom. The coordination number refers to the number of ligands (atoms or molecules) that are directly bonded to the central metal atom. In this case, there are two oxalate ligands (C₂O₄²⁻) and two water ligands (H₂O) bonded to the nickel ion, resulting in a coordination number of 6.
Each oxalate ligand contributes two oxygen atoms, and each water ligand contributes one oxygen atom, giving a total of six ligands surrounding the central nickel atom.
Therefore, in the compound ammonium diaquabis(oxalato)nickelate(II), the central metal atom has a coordination number of 6.
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why would a zipper or a velcro strip be an appropriatee analogy to weak interactions in biochemical reacttions
Answers
A zipper or a Velcro strip can be an appropriate analogy to weak interactions in biochemical reactions because they both involve the attachment and detachment of two complementary parts.
In a zipper, the two sides of the zipper interlock through a series of small hooks and loops. The hooks on one side of the zipper are attracted to the loops on the other side, and as the zipper is pulled together, these hooks and loops interlock, creating a secure connection.
Similarly, in a Velcro strip, two complementary surfaces with tiny hooks and loops are pressed together, creating a temporary bond.
In biochemistry, many reactions between molecules rely on weak interactions, such as hydrogen bonds, van der Waals forces, and hydrophobic interactions.
These weak interactions are important in forming the three-dimensional structures of proteins, nucleic acids, and other biomolecules. These interactions are often reversible and can be broken easily, much like a zipper or Velcro strip.
Just like the hooks and loops of a zipper or Velcro strip, weak interactions in biochemical reactions are specific and complementary. For example, the shape of an enzyme's active site is complementary to the shape of its substrate, allowing the enzyme to bind to the substrate and catalyze a reaction.
The interaction between a ligand and a receptor also relies on specific and complementary interactions between the two molecules.
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What is the molar mass of H3PO4? (atomic mass: H = 1.01, P = 30.97, O = 15.99)
Answers
Answer:
98
Explanation:
molar mass of H3PO4=(3×1)+(31)+(4×16)=3+31+64=98
Even though so much energy is required to form a metal cation with a 2+charge, the alkaline earth metals form halides with general formula MX₂, rather than MX.
(c) Use Hess’s law to calculate ΔH° for the converion MgC₁ to MgCl₂ and Mg( ΔH°f MgCl₂ = - 2641.6 kJ/mol).
Answers
The ∆Hrxn of the reaction is -2252.4kJ/mol.
What is alkaline earth metal?The alkaline earth metals are those elements which correspond to group 2 of the modern periodic table.
All elements of this group forms a cation of +2 charge.
The other elements of this group are:
Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium.
What is Halogen?The Halogen elements are present in group 17 of the modern periodic table.
All elements of this groups forms anions of -1 charge.
The elements of this group are:
Fluorine, Chlorine, bromine, iodine, and astatine.
∆Hrxn = ∆H(bond broken) - ∆H(bond formed)
We have following data of bond energy in kJ/mol:
Mg—Mg = 738
Cl—Cl = -349
Mg—Cl = 2641.6
Since, one mole of Mg react with one mole of Cl atom to form one mole of MgCl
∆Hrxn = 738-349-2641.6
∆Hrxn = -2252.4kJ/mol.
Thus, we concluded that the ∆Hrxn of the reaction is -2252.4kJ/mol.
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Fe2O3(s) + H2(g) = Fe(s) + H2O(l)
jenny does the experiment above and is able to produce 595 grams of iron. how many liters of hydrogen gas would she need to accomplish this?
Answers
Explanation:
\(molar \: mass \: of \: iron = 56 \: g \\ 56 \: g\: are \: weighed \: by \: 1 \: mole \: of \: iron \\ 595 \: g \: will \: be \: weighed \: by \: ( \frac{595}{56} ) \: moles \\ = 10.625 \: moles \: of \: iron \\ from \: equation : \\ 1 \: mole \: of \: iron \: is \: formed \: by \: 1 \: mole \: of \: hydrogen \\ 10.625 \: moles \: will \: be \: produced \: by \: (10.625 \times 1) \: moles \\ = 10.625 \: moles \: of \: hydrogen \\ at \: s.t.p : \\ 1 \: mole \: = \: 22.4 \: litres \\ 10.625 \: moles \: = (22.4 \times 10.625) \\ = 238 \: litres \\ \\ or \: at \: r.t.p : \\ 1 \: mole \: = 24 \: litres \\ 10.625 \: moles \: = \: (10.625 \times 24) \\ = 255 \: litres\)
Purchase process: (50) The process begins with a department admin sending a purchase request to the IT department. The IT Manager reviews the request and if approved, requests a quote from Apple, Dell, HP, ASUS and Lenovo. If rejected, the request is sent back to the admin for review and has to be resubmitted to the IT Manager. The best price will be sent to the admin and once approved, the IT manager finalizes the vendor and then prepares the purchase request. The Procurement Supervisor receives the request and issues the purchase order to the vendor. The Procurement Supervisor then reviews the invoice and processing time from the vendor. By the end of the processing time, if the tracking number was not received, the Supervisor cancels the order. If vendor provides the tracking number, Procurement Supervisor collects the product once delivered and simultaneously submits the payment. Once both the steps are done, the process ends as the purchase is completed.
Answers
The purchase process involves steps such as initiating a request, vendor selection, approval, purchase order issuance, product delivery, and payment, ensuring a systematic approach to procurement for accountability and efficiency.
The purchase process consists of several steps:
1. The department admin initiates the process by sending a purchase request to the IT department.
2. The IT Manager reviews the request and decides whether to approve or reject it.
3. If the request is approved, the IT Manager contacts various vendors, such as Apple, Dell, HP, ASUS, and Lenovo, to request quotes.
4. The IT Manager receives the quotes and selects the best price.
5. Once the best price is selected, the IT Manager informs the admin and waits for their approval.
6. If the admin approves, the IT Manager finalizes the vendor selection and prepares the purchase request.
7. The IT Manager then sends the purchase request to the Procurement Supervisor.
8. The Procurement Supervisor receives the request and issues a purchase order to the chosen vendor.
9. The Procurement Supervisor reviews the vendor's invoice and processing time.
10. If the processing time elapses and the tracking number has not been received, the Procurement Supervisor cancels the order.
11. If the vendor provides the tracking number within the processing time, the Procurement Supervisor collects the product once it is delivered.
12. At the same time, the Procurement Supervisor submits the payment to the vendor.
13. Once both steps are completed, the purchase process is considered finished, and the purchase is completed.
This process ensures that there is a clear and systematic approach to purchasing items, from the initial request to the final delivery and payment. Each step is important in maintaining accountability and efficiency in the procurement process.
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plzz help guyss I'm so confused
Starting from rest, you reach a speed of 20 m/s in 4 seconds. What is your acceleration?