A box rests motionless on the ground. A student is pushing the box to the left with a force of 5 newtons. The force of friction opposes the student's force with a magnitude of 2 newtons in which direction and with what type of speed will the box move? A It will move left at a constant speed B It will move left at an increasing speed It will move right at a constant speed D It will move right at an increasing speed.
Answers
Answer: B
Explanation:
A box rests motionless on the ground. A student is pushing the box to the left with a force of 5 newtons. The force of friction opposes the student's force with a magnitude of 2 newtons in which direction and with It will move left at an increasing speed will the box move.
What is speed?speed is defined as the rate at which the position of an object changes in any direction. Speed is measured as the ratio of distance travelled to time. Speed is a scalar quantity because it only has direction and not magnitude.
The mathematical representation of speed is as follows: s = d/t
s is the speed in m.s-1
d is the distance travelled in meters
t is the time in seconds
There are four types of speeds and they are:
Constant speed Variable speed Average speed Instantaneous speedTo learn more about speed, refer;
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Related Questions
Lori is saving money to buy a new bike. She needs $120 but has only saved 60%.
How much money has she saved so far to go towards the bike?
Answers
12 x 6 is 72
The answer is 72
The molecular mass of a substance is defined as the mass of how many molecules of the substance
Answers
Answer:
Explanation: The molar mass of a substance is defined as the mass of 1 mol of that substance, expressed in grams per mole, and is equal to the mass of 6.022 × 10 23 atoms, molecules, or formula units of that substance
Salt water, like koolaid, or coffee with
sugar are all
mixtures
Answers
Answer:
yes
Explanation:
When convex mirrors are used for security purposes, the images they form
are real images.
A. True
B. False
Answers
Answer:false
Explanation:
If distance, d, is proportional to time, t, and at time t =2.00 seconds, the distance is 6.20 m, find the distance when t = 3.50 s.
Answers
Find 1/4th of 2.00 and add that to 6.2
How many moles in 4.3 x 1024 atoms of sodium (Na)?
Answers
Answer:How many ions are in 2 moles of NaCl?
2 mol NaCl = 2 x 6.02 x 10 23 = 1.204 x 10 24 NaCl formula units 2 mol NaCl = 2 (2 x 6.02 x 10 23 )= 2 (1.204 x 10 24) = 2.408 x 10 24 atoms *2 moles of sodium chloride contains 2.408 x 10 24 ions (combination of Na + ions & Cl – ions). H
Explanation:
sorry i was running out of time
How many grams of water can be produce from the complete reaction of excess nitric acid and 33.2 mL of 0.245 M lithium hydroxide solution, assuming that lithium hydroxide is the limiting reactant?
Answers
Mass of water produced : 0.146 g
Further explanationGiven
33.2 mL of 0.245 M lithium hydroxide
Required
mass of water
Solution
Reaction
HNO₃ (aq) + LiOH (aq) → H₂O (l) + LiNO₃ (aq)
mol LiOH :
= M x V
= 0.245 x 33.2 ml
= 8.134 mmol
From the equation, the mol ratio of HNO₃ : H₂O = 1 : 1, so mol H₂O = 8.134 mmol
mass H₂O :
= mol x MW
= 8.134 x 10⁻³ mol x 18 g/mol
= 0.146 g
What makes the periodic table arrangement so unique and useful?
Answers
HELP ITS TIMED!!!!!!!!!!!!!!!!
1-Butyne and 2-butyne are position isomers.
Select one:
a. True
b. False
Answers
Answer:
False
Explanation:
What is created by the gravitational pull of the moon?
HURRY PLEASE ! I HAVE LIMIT TIME !
Answers
Answer:
Tides . hope this helps
Explanation:
the tidal force causes earth and its water to bulge out on the side closest to the moon
In the experiment, you will heat up 50 grams of cold sand and 50 grams of cold water by adding hot water. Will the kind of material—sand or water—affect the temperature change? State your hypothesis.
Answers
Answer:
If sand is much denser than water, then the water will warm up faster than the sand. So yes, the kind of material—sand or water—affects the temperature change.
Explanation:
I put this as my answer :)
Good luck!! <3
Yes, the kind of material, water or sand will affect the temperature change in the experiment.
Heat produces temperature change in a body. This is one of the effects of heat. However, the extent of temperature change due to heat depends on the nature of the material. A material that has a high specific heat capacity does not undergo a large change in temperature when heat is added.
Yes, the kind of material, water or sand will affect the temperature change in the experiment. The temperature change of sand will be much higher than the temperature change in water when the same quantity of heat is added because water has a higher specific heat capacity than sand.
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What would you se if you looked at a grain of salt
Answers
Answer:
I'd imagine it would look like a snowflake pretty much see through and microscopic
Helpppp meee plzzzzzzz
Answers
6- Mg +2 F-1 MgF2
7- B+3 P-3 BP
8- Li +1 N-3 Li3N
9- Ba +2 Br -1 BaBr2
10- Al +3 P -3 AlP
6. A student is writing a formula for Magnesium Nitrite. He knows nitrite is a polyatomic ion with a charge of -1.
Magnesium is an ion with a charge of +2. He concludes that he will need 2 nitrite ions to balance the charge
across the compound. Thus he writes the final formula as MgN,O2. Explain what he has done wrong.
Answers
Answer:
See explanation
Explanation:
First of all, the student has not represented the formula of the nitrite ion correctly. The formula of the nitrite ion is represented as NO2^- whereas the student wrote N,O2.
Then, the charge on magnesium ion has been correctly designated as +2 while the charge on the nitrite ion is correctly designated as -1. Now, the ions can exchange valencies (without signs and we now write them as subscripts) to yield Mg(NO2)2.
How would you create a negative charge?
Answers
Why do the exceptional configurations taught in this class (only 1 electron moves from an s orbital to a d orbital) happen? (choose all that apply)
Because sublevel overlap results in the d sub level of one energy level being very close to the s sublevel of the next energy level
Because full sub levels are more stable than partially filled sub levels
Because half filled sub levels are more stable than partially filled sub levels
Because electrons want to be in the largest sublevel they can find.
Answers
Answer:
Because half filled sub levels are more stable than partially filled sub levels
Explanation:
The reason for the exceptional configuration found in some atomic orbitals is due to the special stability of half-filled sub-levels over partially filled ones.
One of the characteristic thing about filling some atomic orbitals we have to bear in mind that there is a stability conferred on an atom by being partially filled.
The energy needed to remove an electron from a half-filled configuration or inert gas configuration is very great.
This is why when there is a choice to have half-filled orbitals, it is desirous to go for this configuration.
Giving brainliest pls answer I don't need explanation just answer!!
Answers
Mass of NaCl : 5.85 g
Further explanationGiven
5.3 g Sodium carbonate (Na₂CO₃)
Required
Mass of NaCl
Solution
Reaction
Na₂CO₃ + 2HCl ⇒ 2NaCl + H₂O + CO₂
mol of Na₂CO₃ (MW=106 g/mol) :
= mass : MW
= 5.3 g : 106 g/mol
= 0.05
From the equation, mol ratio Na₂CO₃ : NaCl = 1 : 2, so mol NaCl :
= 2/1 x mol Na₂CO₃
= 2/1 x 0.05
= 0.1
Mass of NaCl (MW=58.5 g/mol) :
= mol x MW
= 0.1 x 58.5
= 5.85 g
What properties do ionic compounds have?
A. low boiling point and conduct electricity when dissolved in water
B. high melting point and conducts electricity when dissolved in water
C. high boiling point and conducts electricity as a solid
Answers
Answer:
High melting point
Explanation: toook the quiz
This is kinda confusing for me
Answers
Answer:
Um did you post something I don't see nothing
Explanation:
Calculate the number of formula units in 1.87 mol of NH4Cl
a. 1.13 x 1024 NH4Cl
b. 6.75 x 1024 NH4Cl
c. 1.12 x 1024 NH4Cl
Answers
Answer:
1.13 x 10²⁴formula units
Explanation:
Given parameters:
Number of moles of NH₄Cl = 1.87mol
Unknown:
Number of formula units = ?
Solution:
From mole concept;
1 mole of a substance contains 6.02 x 10²³ formula units
Now;
1.87 moles of NH₄Cl 1.87 x 6.02 x 10²³ = 1.13 x 10²⁴formula units
5 points
What is the name of the atom pictured here? Use a periodic table if
needed. *
Answers
Answer:
There is nothing attached to this question so I unfortunately cannot help you
Explanation:
The atomic mass of an atom is the sum of:
A protons and electrons
B protons and neutrons
C electrons and neutrons
Answers
Answer:
i think b(proton and neutrons)
7 Coal was produced in the earth over millions of years. Which of the following is NOT a step in
the production of coal?
А Animals died and were covered by sediment.
B Plants died and were covered by sediment.
C Heat, pressure, and time change the peat to lignite.
Time and pressure changes dead plant material to peat.
D
Answers
Answer:
D. Time and pressure changes dead plant material to peat.
Explanation:
There are four steps in the production of coal: peat, lignite, bituminous and anthracite.
Peat: in this stage dead plants are oxidized to water and carbon dioxide and buried under sediments. The partial decomposition of plant matter due to the absence of oxygen is called peat. There is no factor of time and pressure that changes dead plant material to peat.
Lignite: Peat is subjected to heat, pressure, and time to form lignite.
Bituminous: More pressure in lignite removes all the traces of plant matter and form “soft coal”, bituminous coal.
Anthracite: It is the last stage, in which hard coal forms with the combined pressure and high temperature.
Hence, the correct answer is "D. Time and pressure changes dead plant material to peat."
HELPPP!!!!!!!!!!!! ty
Answers
Answer:
increases
Explanation:
it turns out that an object increases as the square of it's speed.
Answer:
Explanation:
In all physical processes taking place in closed systems, the amount of change in kinetic energy is equal to the amount of change in potential energy. If the kinetic energy increases, the potential energy decreases, and vice-versa. this equation reveals that the kinetic energy of an object is directly proportional to the square of its speed. That means that for a twofold increase in speed, the kinetic energy will increase by a factor of four. so therfore stays the same as the object so it would speed up as well.
A series stack of alkaline cells produces 4,524 kW of power of each coll contributes 14,5 w, how many cells are in the stock? (Round to the nearest whole
number)
ОА З
B. 66
OC. 312
OD 3,205
PLEASE HELP!!!!!!!!!
Answers
Answer:
C. 312
Explanation:
Answer:
C-312
EDGE 2021
Explanation:
Can someone plz help me
Answers
Answer:
Number 1,2,and 6.
Explanation:
The base of living things and general reactions are number 1,2,6!
Hope this helps :)
Write 134 020 000 in scientific notation.
Answers
Does solubility have any unit
Answers
Answer:
Solubility may be stated in various units of concentration such as molarity, molality, mole fraction, mole ratio, mass (solute) per volume (solvent) and other units. The extent of solubility ranges widely, from infinitely soluble (without limit) ( miscible) such as ethanol in water, to poorly soluble, such as silver chloride in water.
Explanation:
In an aqueous solution of potassium chloride, the solute is *
1. KCI
2. O H20
3. K
4. CI
Answers
Answer:
1.KCl is answer
Explanation:
when potassium chloride KCl is dissolved in water,it will dissociate to form k+ and cl- .thus,the solute must be k+Cl- .
I hope it's helpful!
The substance dissolved in a solvent or water is called a solute it makes up the homogenous mixture called solution by getting dissolved in it.
The [tex]\rm KCl[/tex] is the solute in the aqueous solution of [tex]\rm KCl[/tex].
The solute can be explained as:The substance that dissolves in an aqueous solvent or any other solvent to form a solution is called a solute.[tex]\rm KCl[/tex] is a solute that dissolves in the water to yield [tex]\rm K^{+}[/tex] and [tex]\rm Cl^{-}[/tex] ions to produce the solution of potassium chloride.Therefore, option A, [tex]\rm KCl[/tex] is the solute.
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What natural process is best represented by
the diagram below?
Answers
Answer:
i actually dont know
Explanation:
