Answer:
the reaction force will be found where the bat hits the ball.
Explanation:
Answer:
reaction force will be found where the bat hits the ball
Explanation:
Explain why it is difficult to remove lid from a preserving jar which was closed when the food was full of steam?
Answer:
As the contents cool, the pressure of the air left inside the jar falls and the metal on the lid pops downwards. The greater atmospheric pressure outside the jar keeps the metal button depressed and makes it more difficult to open the jar.
(1) A positive charge +3 C is separated from another positive charge of +5 C by a distance of 7m. What is the magnitude of the electric force between the two charges?
(a.) 1.9 × 10 to the 10th power N (b.) 2.8 × 10 to the 9th power N (c.) 2.1 N (d.) 0.31 N
(2) A molecule has 223 electrons and 218 protons. what is the net charge on the molecule ? (a.) 5 × 10 the the - 19th power C (b.) - 5 × 10 to the - 19th power C (c.) 8 × 10 to the - 19h power C (d.) -8 × 10 to the - 19th power C
(3) A negative charge of 2 × 10 to the negative 4 C and a positive charge of 8 × 10 to the negative 4 C are separated by a distance of 0.3 m. what is the magnitude of the force between the charges? (a.) 4800 N (b.) 1.78 × 10 to the - 6th power N (c.) 16000 N (d.) 0.001 N
(4) Which one of these statements is true of a neutral or charged object?
(a.) A neutral object does not have any charged particles in it.
(b.) A neutral object does not have any protons or electrons in it.
(c.) A neutral object has equal numbers of protons and electrons.
(d.) The protons and electrons in a neutral object do not have any charge.
THEY ARE ALL SEPARATE QUESTIONS
THANK YOU
1. The magnitude of the electric force between the two charges is 2.8×10⁹ N (Option B)
2. The net charge on the molecule is -8×10⁻¹⁹ C (Option D)
3. The magnitude of the force between the charges is 16000 N (Option C)
4. The correct statement is: A neutral object has equal numbers of protons and electrons. (Option C)
1. How to determine the forceCharge 1 (q₁) = +3 CCharge 2 (q₂) = +5 CElectric constant (K) = 9×10⁹ Nm²/C²Distance apart (r) = 7 mForce (F) =?F = Kq₁q₂ / r²
F = (9×10⁹ × 3 × 5) / (7)²
F = 2.8×10⁹ N
2. How to determine the net charge on the moleculeElectron = 223 electronsProton = 218 protonsNet Charge =?Charge = Proton - Electron
Charge = 218 - 223
Charge = -5 electrons
But
1 electron = 1.6×10⁻¹⁹ C
Thus,
Net Charge = -5 × 1.6×10⁻¹⁹ C
Net Charge = -8×10⁻¹⁹ C
3. How to determine the forceCharge 1 (q₁) = 2×10⁻⁴ CCharge 2 (q₂) = 8×10⁻⁴ CElectric constant (K) = 9×10⁹ Nm²/C²Distance apart (r) = 0.3 mForce (F) =?F = Kq₁q₂ / r²
F = (9×10⁹ × 2×10⁻⁴ × 8×10⁻⁴) / (0.3)²
F = 16000 N
4. What is a neutral object?A neutral object is an object having equal numbers of protons and electrons. For example, an object with 4 protons and 4 electrons is said to be neutral as illustrated below
Electron = 4 electronsProton = 4 protonsNet Charge =?Charge = Proton - Electron
Charge = 4 - 4
Charge = 0 (neutral)
Thus, the correct statement about neutral object, given in the question is: A neutral object has equal numbers of protons and electrons (Option C)
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Two identical negative charges exert a repellent force of 150 N on each other when they are 40 cm apart. that is the magnitude of each negative charge?
a. 2.7 nC
b. 51.6 microC
c. 0.67 microC
d. 0.82 mC
What is the first stage of metamorphosis?
Adult
Egg
Larva
Nymph
1.what is gravity?(in your own words)
2.How does gravity cause the planets to move in a circle around the sun?
Answer:
1.Gravity is an invisible force that pulls objects toward each other
2.The suns gravity pulls the planet towards the sun which changes the straight line of direction into a curve
That keeps the planet moving in an orbit around the sun
hope it helped:)
1. Gravity is an imperceptible force that pulls entities toward each other
2. When The sun's gravity pulls the planet towards.
What is Gravity?
The gravitational attraction of the original gaseous significance present in the Universe forced it to begin coalescing and creating stars and caused the stars to group concurrently into galaxies,
So, gravity is accountable for the consideration of the large-scale structures in the Macrocosm.
When the sun transforms the straight line of movement into a curve That preserves the planet pushing in an orbit almost like the sun.
The gravity pulls the sun and the planets concurrently while controlling them apart. The inertia feeds the tendency to preserve speed and keep pushing.
Nevertheless, the gravitational pull desires to reverse the motion to pull the planets into the core of the sun.
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Can someone tell me what's the formular for extension? Thank youu
Answer:
F = ke
Explanation:
F is the applied force.
k is the spring constant.
And e is extension.
It can be re-arranged as k=F/e or e=F/k. It is Hooke's law.
F = ke is the formula for the extension.
When an object's length rises, extension occurs, and when it reduces, compression occurs. Hooke's law states that force applied by a spring equals extension minus the spring constant. This law describes the extension of an elastic item, such as a spring.
The lengthened portion of an object, such as a spring, is known as its extension. According to Hooke's law, as long as the limit of proportionality is not crossed, a spring's extension is directly proportionate to the force exerted.
F = ke
F is the applied force.
k is the spring constant.
And e is an extension.
It can be re-arranged as k=[tex]\frac{F}{e}[/tex] or e=[tex]\frac{F}{K}[/tex]. It is Hooke's law.
Understanding the behavior of the material as it is stretched or compressed requires knowledge of Hooke's law. By comprehending the material behavior features, technology can be improved.
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(1.) A 0.5 kg basketball rolls off the roof of a building. At a moment when it is 3 m above the ground, it has a speed of 2.5 m/s. What is the total mechanical energy of the basketball ?
(2.) In the previous problem, how much kinetic energy does the football possess just after the throw? Assume that the football started from rest.
Answer:
The answer is C.
Explanation:
Since the total mechanical energy is conserved, kinetic energy (and thus, speed) will be greatest when the potential energy is smallest.
(1.) Consider the equation: 4Fe + 3O2 yields 2Fe2O3
- What is the theoretical yield of Fe2O3 when 12.0g of iron rusts?
- If 14.21 g of Iron (III) oxide is actually produced what is the percent yield ?
(2.) what is the molarity of a 126.81 L solution that contains 5.1 moles of KCl ?
1a. The theoretical yield of Fe₂O₃ obtained is 17.14 g
1b. The percentage yield of Fe₂O₃ obtained is 82.9%
2. The molarity of the KCl solution is 0.04 M
1a. How to determine the theoretical yield of Fe₂O₃Balanced equation
4Fe + 3O₂ —> 2Fe₂O₃
Molar mass of Fe = 56 g/mol
Mass of Fe from the balanced equation = 4 × 56 = 224 g
Molar mass of Fe₂O₃ = (56×2) + (16×3) = 160 g/mol
Mass of Fe₂O₃ from the balanced equation = 2 × 160 = 320 g
SUMMARY
From the balanced equation above,
224 g of Fe reacted to produce 320 g of Fe₂O₃
Therefore,
12 g of Fe will react to produce = (12 × 320) / 224 = 17.14 g of Fe₂O₃
Thus, the theoretical yield of Fe₂O₃ is 17.14 g
1b. How to determine the percentage yield Actual yield of Fe₂O₃ = 14.21 gTheoretical yield of Fe₂O₃ = 17.14 gPercentage yield of Fe₂O₃ =?Percentage yield = (Actual / Theoretical) × 100
Percentage yield of Fe₂O₃ = (14.21 / 17.14) ×100
Percentage yield of Fe₂O₃ = 82.9%
2. How to determine the molarity of the KCl solutionMole of KCl = 5.1 molesVolume = 126.81 LMolarity of KCl =?Molarity = mole / volume
Molarity of KCl = 5.1 / 126.81
Molarity of KCl = 0.04 M
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What 2 factors is potential energy (PE) dependent upon
Answer:
The mass and gravity.
Explanation:
Depending on how much mass there is in an object, will determine how fast/slow and object moves. This is the same with gravity, if there is a larger slope, there will be more energy, and if there is less there will be less movement.
Answer:
1. the height of the object relative to a reference point
2. its mass
Explanation:
Using the formula for work, Match the Force × Distance problems with their correct "Work Performed" answer. The first example has been completed for you.
Force × Distance = Work Performed
10 newtons 6 meters =60 Nm
1. 62 Nm
40 pounds 100 feet
2. 4000ft.-lbs.
2.5 pounds 24 inches
3. 5 ft.-lbs
62 newtons 1 meter
4. 200ft.-lbs.
1 ton 20 feet
5. 40,000 ft.-lbs.
400 pounds 0.5 feet
Britney suspended a bar magnet and tried to check if thin iron clips would hang from it. He kept hanging them one after another, till no more pins would hang. He tried it at 5 places as shown in the figure.
Britney made the following conclusions from the experiment.
1. The magnetic attraction is powerful at the poles and weaker as we go towards the centre.
2. A bar magnet when freely suspended, always points towards the NS direction.
3. Between P and Q and between S and T, the magnet will not attract any iron clips.
4. All the pins shown in the figure behave like magnets.
Which of these are VALID conclusions?
Answer:the answer is 1
Explanation:
Because the force is weaker in the middle of the magnet and halfway between the pole and the center.
Static electricity occurs when charges build up on an object instead of flowing. The static charge on the object can build up in one of four ways. Name and give an example of each of the four ways that static electricity can be created.
Answer:
Explanation:
Charges can redistribute themselves to create static electricity in four different ways: friction, conduction, induction, and polarization.
Frictional charging is the process of moving electrons from one chargeless object to another by rubbing the two together. (Example: When two objects rub against each other, some electrons may transfer (hair and balloon)Conduction charging is the direct transmission of electrons from one item to another. (Example: when you massage your feet on the carpet, the charges travel to your hands.)Induction charging: Without physically touching the charged object, electrons can respond to its electric field. Electrons can easily break out from their atoms in some materials, such as metals. When a negatively charged thing is near a metal object, the field repels electrons, causing them to migrate away from it. (Example: The metal object develops a positive charge at its close end and a negative charge at its far end. We refer to this procedure as induction.)Polarisation charging: Electrons only travel within their own atoms when other materials are being charged by polarization. Individual atoms develop charged ends as a result of the electrons' reactions to electric fields, which attract other charged objects. Polarization exists here. Neither polarisation nor induction alters the overall charge of the items since charges don't transfer between them.what things would u need to survive the tropshere??
Answer:
The troposphere is essential as it contains the Earth's weather as well as greenhouse gases to maintain the temperature on Earth.
Explanation:
What kind of criticism actually improves social interactions among team members?
A( destructive
B( constructive
C( frequent
D( hesitant
Answer:
d hesitant
Explanation:
no exceptions
A crowbar with the length of 200 cm is used to lift the load of 600 Newton . If the distance between fulcrum and load is 0.75 . Calculate Effort , Mechanical advantage and Velocity ratio
Answer:
a. Effort = 960 Newton
b. Mechanical advantage (M.A) = 0.625
c. Velocity ratio (V.R) = 1.67
Explanation:
Given the following data;
Load = 600 N
Length of crowbar = 200 cm
Length of load arm = 0.75 m
Conversion:
100 cm = 1 m
X cm = 0.75 m
Cross-multiplying, we have;
X = 0.75 * 100 = 75 cm
First of all, we would find the effort arm;
Effort arm = length of crow bar - length of load arm
Effort arm = 200 - 75
Effort arm = 125 cm
Next, we would determine the mechanical advantage (M.A) of the crow bar;
Substituting the values into the formula, we have;
M.A = 0.625
To find the effort of the crow bar;
Making "effort" the subject of formula, we have;
Effort = 960 Newton
Lastly, we would determine the velocity ratio (V.R);
V.R = 1.67
Answer:a. Effort = 960 Newton
b. Mechanical advantage (M.A) = 0.625
c. Velocity ratio (V.R) = 1.67
Explanation:
Why would an object have a much lower maximum speed falling through water than falling through air?
Answer:
Explanation:
when objects move through a fluid such as air or water the fluid exerts a frictional force on the moving object. the frictional force from fluid is called a drag force friction drag force causes objects to slow down as they move through a fluid such as air or water.
(1.) When aqueous solutions of Fe(NO3)3 and NaOH are mixed, Fe(OH)3 and NaNO3 are formed. is there a precipitate formed? if yes, write the formula for the precipitate and explain why it is the precipitate using the solubility rules. (2.) When aqueous solutions of potassium iodide and Lead (II) nitrate are combined, potassium nitrate and solid lead (II) iodide are formed. Write the balanced,complete ionic and net ionic equations for this reaction
From the solubility rules, both reactions 1 and 2 lead to precipitates.
What is a precipitate?The term precipitate refers to the solid that separates out of the reaction mixture . We know that the solubility of a substance in water is predicated on the solubility rules.
1) The reaction here is;
Fe(NO3)3(aq) + 3NaOH(aq) ------> Fe(OH)3(s) + 3NaNO3(aq) - The precipitate is Fe(OH)3 because only the hydroxides of group 1 elements are soluble in water.
2) The reaction is;
Pb(NO3)2(aq) + 2KI(aq) ----->PbI2(s) + 2NaNO3(aq) - The precipitate is PbI2 because most iodides are soluble except the iodides of Ag+, Hg+2, and Pb+2
Complete Ionic equation;
Pb^2+(aq) + 2NO3^-(aq) + 2K^+(aq) + 2I^-(aq) ------> PbI2(s) + 2NO3^-(aq) + 2K^+(aq)
Net ionic equation;
Pb^2+(aq) + 2I^-(aq) ------> PbI2(s)
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What type of presentation us easier to plan using a site map?
A. a presentation that lets users link our from a “home” page or slide
B. an animation created digitally using a program like Flash
C. a slide show that starts on slide one and goes slide by slide to the end
Answer:
I believe that the answer would be A
Explanation:
because there is all of the examples I found online have a home page.
100 POINTS+BRAINLIEST: 8TH GRADE SCIENCE - EVAPORATION VS VAPORIZATION: is option B actually wrong? Because vaporization involves a solid OR liquid turning into a gas above BP, while evaporation is when liquid turns into gas below the BP (boiling point). If I'm wrong please explain why -Thanks!!!!
Answer:
Explanation:
Vaporization occurs during the boiling/sublimation process. That is the only reason why I could see this being marked as wrong.
Answer:
Explanation:
yes it is wrong vaperation only occurs during the boiling process
PLEASE HELP
Highlight the objects or materials items that are made of cells and did originate from cells.
Answer:
ur mom
Explanation:
Answer: flowers chromomes cell membranes clorophyl
Explanation: cells are the building blocks of life and flowers contain cells for different things like we contain cells for mitosis I am strongly sure about flowers but the rest maybe wrong hope this helped!
A block and tackle machine is used to raise 300 kg grand piano a vertical distance of 12.5 m. If the efficiency of the block and tackle machine is 0.80, how much work must the piano movers do in lifting the piano ? a. 45938 J b. 36750 J c. 29400 J d. 4688 J
The amount of work done by the piano mover in lifting the piano 45938 J (Option A)
What is efficiency?This can be defined as the capacity to achieve a given task with little or no waste. Mathematically, it can be expressed as
Efficiency = (output / input) × 100
How to determine the work inputMass (m) = 300 KgDistance (s) = 12.5 mEfficiency = 0.80Acceleration due to gravity (g) = 9.8 m/s²Output = mgs = 300 × 9.8 × 12.5 = 36750 JInput = ?Efficiency = output / input
Input = Output / efficiency
Input = 36750 / 0.8
Input = 45938 J
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10pts} The velocity of a very high-performance slingshot is about 156 ft/s. This equals approximately 47.5 m/s. What would the height of a steel shot be if launched vertically on Earth? What about the moon? (g moon = 1.62 m/s²)
~ GIVE BOTH ANSWERS WITH THE WORK BENEATH THE ANSWER SO I CAN UNDERSTAND FOR BRAINLIEST!!! {do remember that if there is only one answer, I cannot give brainliest}
~~ !SHOW YOUR WORK PLEASE!
Answer:
My MASS on Earth (g = 9.81 m/s^2) is 90kg. What is my MASS on the moon (g = 1.62 m/s^2)? *
Explanation:
what things would you need to survive in the troposphere?
Answer: i think it means how we need plants, water, food, and gases from that to survive?
Explanation:
Based on Newton’s 3rd Law of motion, if a baseball player hits a ball with the bat, the action force is the impact of the bat against the ball. Explain where the reaction force can be found.
Please help if it is right, I will give you Brilliant and a 100 points, if it is right I will add you and make a fake question for 100 points. Hears the question: The options are in parentheses
Match these items.
1.wispy white clouds in high-altitude made of ice crystals
(Maritime tropical)
2.direction of rotation of air around an anticyclone
(Continental tropical)
3.air mass that is cold and dry
(Maritime polar)
4.air mass that is hot and dry
(front)
5.puffy, tall clouds with a broad base and billowing top
(clockwise)
6.the boundary between two meeting air masses
(cumulus)
7.air mass forming over the Pacific Ocean off the coast of Canada
(stratus)
8.air mass forming over the Gulf of Mexico
(Continental polar)
9. clouds occurring in sheets or layers
(Cirrus clouds)
1: Cirrus cloud
2:Clock wise
3: Continental polar
4: Continental tropical
5: Cumulus cloud
6: Front
7: Maritime polar
8:Maritime tropical
9: Stratus
I may be wrong with some since I did this last year, but I'm pretty sure they are all right
Which of the statements relate to cell theory?
A. The sales is the basic unit of structure and all organisms.
B. Cells have similar functions
C. All cells come from other cells.
D. All non-living things are composed of cells
PLEASE HELP
Carlos is making phosphorus trichloride using the equation below.
2P +3Cl2 _PCl3
What coefficient of PCl3 would show that the law of the conservation of mass is represented in the chemical equation?
A.4
B.3
C.2
D.1
Answer:
I think its C. 2 but I am not quiet sure
What is a way to make magnets?
Heating
Pressure
Freezing
Answer:
Heating is the answer
Explanation:
I took the quiz and i know its a late response
Freezing is a way to make magnets from ferromagnetic substance.
What is Curie temperature?Curie point, also known as Curie Temperature, is the temperature at which the magnetic characteristics of some magnetic materials abruptly change. Remnant magnetism manifests in rocks and minerals below the Curie point, which for magnetite, a common magnetic mineral, is approximately 570 °C (1,060 °F).
In some magnetic materials, atoms that act as small magnets spontaneously align themselves below the Curie point, which for iron is 770 °C (1,418 °F). Because the atomic magnets in each microscopic region (domain) of ferromagnetic materials, such as pure iron, are aligned in the same direction, their magnetic fields reinforce one another.
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PLEASE HELP!!
What type of exercise are you completing if you contract your muscles to produce movement?
A. concentric
B. eccentric
C. isometric
D. isotonic
Answer:
A
Explanation:
YAYAYAYAYAYA
If the crests of two waves overlap, which of the following will be true regarding the new wave formed?
A. The new wave will produce a lower-pitched sound than the two original waves.
B. The new wave will produce a louder sound than the two original waves.
C. The new wave will produce a quieter sound than the two original waves.
D. The new wave will produce a higher-pitched sound than the two original waves.
Answer:
c
Explanation:
Answer: b
Explanation: Constructive Interference – when waves combine to form a wave with a larger amplitude. They add their energies, so when the crests of two waves overlap, they make a higher crest. If two troughs overlap, they make a deeper trough.
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