Which is a correct reason to physically connect objects with a bond wire when transferring flammable liquids? A. To create a pathway for the liquid to flow easily B. To eliminate a difference in the static charge potential C. To lessen the likelihood of a spill

Answers

Answer 1
When Transferring Flammable Liquids - Option A

To create a pathway for the liquid to flow easily is a correct reason to physically connect objects with a bond wire when transferring flammable liquids. Physically connect the two conductive objects together with a bond wire to eliminate a difference in static charge potential among them. The bond wire is attached between the containers in the process of flammable filling liquid actions except for a metallic path is found.


Answer 2

Answer

Correct Option is A

Explanation:

Correct Option is A that is to create a pathway for the liquid to flow easily

Option B

This option is not correct because objects are not conductive.  

Option C

This option is also not correct because better options are there to lessen the spill

Hope this answer will help you



Related Questions

Which is the correct interpretation of the formula mgf2? the lattice contains 1 magnesium atom for every 2 fluorine atoms. the lattice contains 1 magnesium ion for every 2 fluoride ions. the lattice contains 2 magnesium atoms for every fluorine atom. the lattice contains 2 magnesium ions for every fluoride ion.

Answers

Answer: the lattice contains 1 magnesium ion for every 2 fluoride ions.

[tex]MgF_2[/tex]  is an ionic compound. It contains positive ions of Magnesium and  and negative ions of Fluorine. To balance the +2 positive charge of one magnesium ion, two (-1) negatively charged Fluorine ions are present. Hence, The correct interpretation of [tex]MgF_2[/tex]  is that the lattice contains 1 Magnesium ion for every 2 Fluoride ions.

The fact that the sun exerts a force on you, even though it it very far away, is a consequence of the Universal Law of __________.

Answers

Gravitation, gravity won't work, it has to be gravitation

the answer is gravitation  :D

What is another hypthesis that might expain hy hummingbirds seem to prefer red flowers

Answers

Because it's maybe the only color they see.

Which reaction would result in a change in odor, indicating a chemical change has occurred?

Answers

odour = gas suggesting molecular rearrangement ... chem change

Final answer:

A change in odor can indicate a chemical change has occurred. Examples include the oxidation of iron in myoglobin when cooking red meat and a banana turning brown.

Explanation:

A change in odor can indicate a chemical change has occurred. Examples of reactions that result in a change in odor include the oxidation of iron in myoglobin when cooking red meat, which causes a red-to-brown color change and change in smell. Another example is a banana turning brown, where new, darker substances form and the odor changes. These changes in odor are indicators that chemical reactions have taken place.

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The military uses a special instrument to detect this type of wave to help improve night vision.

A. infrared waves

B. gamma rays

C. radio waves

D. ultraviolet rays

Answers

Night vision equipment detects infrared radiation.  Where it detects some, it paints the corresponding place on a screen with visible rays.

An archer wants to hit a target that is dropped from a tower. At the sound of a horn, the archer is to shoot an arrow; at the same instant, the target will be dropped. Ignoring air resistance, where should the archer aim in order to hit the target?


A. slightly above the initial position of the object


B. at the spot where the archer hopes to hit the target


C. directly at the initial position of the object


D. above the spot where the archer hopes to hit the target

Answers

It has to be D because the arrow will drop as it moves, if it were a gun, you'd lead the target so fire below it, but due to it being an arrow, you aim high not low. Also, they didnt specify how fast anything is, so you'd probably miss if you actually did it.


Answer:

C. directly at the initial position of the object

Explanation:

As we know that archer wants to hit the target at a given position but at the same time when archer shot the arrow the the target is also dropped under gravity

So here the arrow will move simultaneously in two directions

a) horizontal motion with uniform speed

b) motion under gravity

so here the arrow will move under gravity and drops the same distance in same time as that the target will drop due to gravity

so here the motion of arrow will hit the target if the archer initial shot at the initial position of the target

urgent!
A 1.00-kg beaker containing 2.50 kg of oil (density = 916 kg/m3) rests on a scale. A 1.90 kg block of iron is suspended from a spring scale and completely submerged in the oil (Fig. P9.30). Find the equilibrium readings of both scales.

Answers

mass of iron block given as

[tex]m_1 = 1.90 kg[/tex]

density of iron block is

[tex]\rho = 7860 kg/m^3[/tex]

now the volume of the iron piece is given as

[tex]V = \frac{m}{\rho}[/tex]

[tex]V = \frac{1.90}{7860} = 2.42* 10^{-4} m^3[/tex]

Now when this iron block is complete submerged in oil inside the beaker the buoyancy force on the iron block will be given as

[tex]F_b = \rho_L V g[/tex]

here we know that

[tex]\rho_L[/tex] = density of liquid = 916 kg/m^3

[tex]F_b = 916* 2.42 * 10^{-4} * 9.8[/tex]

[tex]F_b = 2.17 N[/tex]

Now for the reading of spring balance we can say the spring force and buoyancy force on the block will counter balance the weight of the block at equilibrium

[tex]F_s + F_b = mg[/tex]

[tex]F_s + 2.17 = 1.90* 9.8[/tex]

[tex]F_s = 16.45 N[/tex]

So reading of spring balance will be 16.45 N

Now for other scale which will read the normal force of the surface we can write that normal force on the container will balance weight of liquid + container and buoyancy force on block

[tex]F_n = F_g + F_b[/tex]

[tex]F_n = (1 + 2.50)*9.8 + 2.17[/tex]

[tex]F_n = 34.3 + 2.17 = 36.47 N[/tex]

So the other scale will read 36.47 N

Final answer:

To find the equilibrium readings of the beaker and spring scale, use Archimedes' principle and the concept of buoyancy.

Explanation:

In this question, we are given a beaker containing oil and a block of iron that is submerged in the oil. We need to find the equilibrium readings of both the beaker and the spring scale. To solve this problem, we can use Archimedes' principle and the concept of buoyancy.

The equilibrium reading of the beaker can be found by calculating the weight of the beaker and the weight of the oil it contains. The weight of the beaker can be obtained by multiplying its mass by the acceleration due to gravity, while the weight of the oil can be calculated using its density and volume. The equilibrium reading of the spring scale can be found by calculating the buoyant force acting on the block of iron. The buoyant force is equal to the weight of the fluid displaced by the block of iron, which can be calculated using the density of the oil, the volume of the block, and the acceleration due to gravity.

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Electric field lines can never cross.
What would crossed electric field lines indicate?
A) a field pointing in two directions
B) an attractive force on a charge
C) a non uniform area
Of the field
D) a place where the field strength is zero

Answers

Answer:

the correct answer on E2020 is A.) a field pointing in two directions.

Electric field lines can never cross. The crossed electric field lines indicate a field pointing in two directions. The correct option is A.

What is electric field?

The field developed around a charge. In this field, a charge experiences an electrostatic force of attraction or repulsion depending on the nature of another charge.

Electric field lines originate from positive end and terminate to the negative end of the magnet.

So, the crossed electric field lines indicate a field pointing in two directions.

Thus, the correct option is A.

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What is the unit used for measuring both work and energy?

A) joule
B) Newton
C) Pascal
D) meter

Answers

A

the unit used for measuring both work and energy is the joule



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What is the unit used for measuring both work and energy?

A) joule✔✔

B) Newton

C) Pascal

D) meter

Why can we never prove that a hypothesis is true?

Answers

A theorem can be proven (from axioms or prior theorems), using logic.

A hypothesis can be supported by evidence. The more evidence in support of the hypothesis, the more likely the hypothesis is to be correct. However, you’re always at the mercy of contrary evidence appearing in the future, to reduce the likelihood or even invalidate a hypothesis.

A (mathematical) proof suffers no such vulnerability to future evidence, as long as you hold the axioms of the theory to be true, and as long as there was no flaw in the construction of the proof.

Scientific hypotheses cannot be proven to be true but can be strongly supported by evidence.

Hypotheses in science cannot be proven to be true with absolute certainty because scientific knowledge is always subject to revision and refinement based on new evidence. However, we can provide strong evidence supporting a hypothesis through experimentation and observation. Scientific theories are formed when a hypothesis has been extensively tested and supported by a large body of evidence. Such theories serve as the most accurate explanations for natural phenomena and are considered to be highly reliable.

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At a distance of 0.75 meters from its center, a Van der Graff generator interacts as if it were a point charge, with that charge concentrated at its center. A test charge at that distance experiences an electric field of 4.5 × 105 newtons/coulomb. What is the magnitude of charge on this Van der Graff generator?

Answers

Since the Van de Graaff generator is given to behave like a point charge, we can use the equation for Electric Field, given as

[tex]E = \frac{kQ}{r^{2} }[/tex]

where, [tex]k = \frac{1}{4\pi ε₀}[/tex] = [tex]8.99 X 10^{9} \frac{Nm^{2} }{C^{2} }[/tex]

r is the distance between the generator and the test charge = 0.75 m

E is the magnitude of the Electric Field Strength = [tex]4.5 X 10^{5} N/C[/tex]

Rearranging the equation, making Q the subject of the formula, we have

[tex]Q = \frac{E.r^{2} }{k}[/tex]

Plugging in the numerical values and simplifying them gets us

[tex]Q = 0.2815 X 10^{-4} \\[/tex]

Thus, the charge on the Van de Graaff generator is 28.16 μC.

Answer:

Answer is 2.8 × 10-7 coulombs.

If a rock climber accidentally drops a 77.5-g piton from a height of 215 meters, what would its speed be just before striking the ground? ignore the effects of air resistance.

Answers

Let us list out what we know from the question.

Initial Velocity [tex]V_{i}  = 0[/tex] since the piton is 'dropped'.

Vertical Displacement of the piton D = 215 m

Acceleration due to gravity [tex]a = 9.8 m/s^{2}[/tex]

Final Velocity [tex]V_{f} = ?[/tex]

Using the equation, [tex]V^{2} _{f} = V^{2} _{i}  + 2aD[/tex] and plugging in the known values, we get

[tex]V^{2} _{f}  = 0^{2}  + 2(9.8)(215)[/tex]

Simplifying by taking square-root on both sides gives us [tex]V_{f} =  64.915 m/s[/tex]

Thus, the speed of the piton just before striking the ground is 65 m/s.

The speed of the piton just before striking the ground would be approximately 64.94 meters per second.

To determine the speed of the piton just before it strikes the ground, we can use the kinematic equation for an object in free fall under the influence of gravity, ignoring air resistance. The equation is:

[tex]\[ v = \sqrt{2gh} \][/tex]

Given:

- The mass of the piton (m) is [tex]\( 77.5 \, g \)[/tex] or [tex]\( 0.0775 \, kg \)[/tex] (since [tex]\( 1 \, g = 0.001 \, kg \))[/tex],

- The height (h) is 215 m.

We can plug these values into the equation:

[tex]\[ v = \sqrt{2 \times 9.81 \, m/s^2 \times 215 \, m} \] \[ v = \sqrt{2 \times 9.81 \times 215} \] \[ v = \sqrt{4217.7} \] \[ v \approx 64.94 \, m/s \][/tex]

A gas with constant temperature has a pressure of 4 atm this pressure changes to 0.2 atm causing the volume to increase to 500L what was the initial volume of the gas

Answers

Using the combined gas law of P1V1=P2V2 and plug it in you get (4)V1 for you don't have initial volume = (0.2)(500) --> 4V1=100, divide by the coefficient on both sides and you get V1=25

Answer:

[tex]25L[/tex]

Explanation:

The problem can be solved using Boyle's law for the volume and pressure of a gas at constant temperature:

[tex]P_{1}V_{1}=P_{2}V_{2}[/tex]

Where the quantities with sub-index 1 are the initial conditions for the gas and the quantities with sub-index 2 are for the final conditions of the gas.

We want to know the initial volume, this is:

[tex]V_{1}=\frac{P_{2}V_{2}}{P_{1}}[/tex]

we also know from the problem that

[tex]P_{1}=4atm\\P_{2}=0.2atm\\V_{2}=500L[/tex]

Thus, the initial volume V1 is:

[tex]V_{1}=\frac{0.2atm*500L}{4atm}[/tex]

[tex]V_{1}=25L[/tex]

How is the energy of an electromagnetic wave carried from one place to another

Answers

changing electric field gives a changing magnetc field ... can calculate energy using Poynting vector

Suppose the mower is moving at 1.5 m/s when the force F is removed. How far (in m) will the mower go before stopping? The frictional force is a constant 26 N and mass of mower is 22kg

Answers

Final answer:

The mower will go approximately 1.163 meters before stopping.

Explanation:

To determine the distance the mower will go before stopping, we need to calculate the deceleration first. We can use Newton's second law of motion: F = ma. The net external force (F) is the force exerted by the person minus the frictional force, which is 51 N - 24 N = 27 N. The mass of the mower (m) is 22 kg. Rearranging the formula, we get: a = F/m = 27 N / 22 kg = 1.227 m/s².

Then, using the equation v² = u² + 2as, where v is the final velocity (0 m/s when the mower stops), u is the initial velocity (1.5 m/s), a is the deceleration (-1.227 m/s²), and s is the distance we're trying to find. Rearranging the equation, we get: s = (v² - u²) / (2a) = (0 - (1.5)²) / (2 * (-1.227)) = 1.163 m.

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The lawn mower will travel approximately 0.955 meters before stopping.

To find out how far the lawn mower will travel before stopping, we need to use the principles of physics, specifically the concepts of friction and linear motion. Here’s the step-by-step method:

We start with the given data: The frictional force F opposing the mower’s motion is 26 N, the mass m of the mower is 22 kg, and its initial velocity v0 is 1.5 m/s.The frictional force is the only force acting in the horizontal direction once the pushing force is removed, causing the mower to decelerate.The acceleration a can be found using Newton's second law: a = F/m. Thus, a = 26 N / 22 kg ≈ 1.18 m/s².This acceleration is negative because it is a deceleration (the mower is slowing down): a = -1.18 m/s².To find the stopping distance, we use the kinematic equation: vf² = v0² + 2ad, where vf is the final velocity (0 m/s), v0 is the initial velocity, a is the acceleration, and d is the distance.Rearranging for d: d = (vf² - v0²) / (2a). Plugging in the values: d = (0 - (1.5)²) / (2 * -1.18) ≈ 0.955 m.

Therefore, the lawn mower will travel approximately 0.955 meters before coming to a stop.

If an object is said to be moving at 10m/s due north. The measurement 10 m/s would be best described as

Answers

The answer is velocity


Answer: Speed.

Explanation :

It is given that if an object is said to be moving at 10 m/s due north. In this case, the velocity of an object is given. It has both magnitude and direction as well.

Velocity is a vector quantity. 10 m/s is the magnitude of velocity and it is moving towards the north direction.

We know that the sped of an object is the total distance covered divided by the total time is taken. It is a scalar quantity.

So, 10 m/s shows the speed of an object.

Mrs. Newman’s class decides to perform an experiment during a class connect session to determine how long it takes different objects to hit the floor when dropped from the student’s desk. Each student dropped three notebooks, one weighing 0.5 pound, one weighing 1.0 pound, and one weighing 2.5 pounds. What would you predict about the times it took for each of them to hit the floor?

a) The 0.5lb notebook would hit the floor first
b) The 0.5lb notebook would hit the floor last
c) The 2.5lb notebook would hit the floor first
d) All notebooks would fall at the same time
e) All notebooks would remain suspended in the air

Answers

D, all notebooks would hit the floor at the same time. The time it takes to hit the floor is independent of their weight, but rather dependent on the acceleration of gravity. Since gravity is constant, they will all hit the floor at the same time.

the correct answer would be D because they all have the same gravitational pull

What best describes why kepler’s observation of planetary motion is a law instead of a theory

Answers

A hypothesis is a guess based off of previous dater or simply reasoning for the most logical outcome.

A theory is a statement that has evidence and facts supporting it but still has room for change or error.

A law is a proven statement that works in every possible case without exception and will never be disproved (unless it was wrongly named a law in the first place).

As you sit in front of a computer, which of the following is exerting the greatest gravitational force of attraction on you?

A. Earth
B. Your classmate across the room that you've had your eye on
C. Your computer
D. Your chair

Answers

Answer: Earth

Explanation:

What step of the rock cycle happens as the sea stacks are broken down

Answers

D. Weathering

The six steps of the rock cycle includes Weathering and Erosion, Transportation, Deposition, Compaction and Cementation. Metamorphism, Rock Melting.

Deposition is the process where rock particles sink at the rivers and become sediment.

Weathering is the process by which wind and water breaks down igneous, sedimentary, and metamorphic rocks. The process refers to large rocks broken down into smaller pieces and the broken off particles stay in the area.  


WILL GIVE BRAINLIEST PLZ HURRY!!!!
When the final velocity is less than the initial velocity, this is , options: speed time acceleration deceleration

Answers

When an object is having variable velocity then we can use the definition of acceleration to find it that rate of change in velocity is known as acceleration.

We can define it as

[tex]a = \frac{v_f - v_i}{\Delta t}[/tex]

here

[tex]v_f[/tex] = final velocity

[tex]v_i[/tex] = initial velocity

[tex]\Delta t[/tex] = time interval

now it is given here that final velocity is less than initial velocity after some time which means

[tex]v_f < v_i[/tex]

so here we can say acceleration will have negative value which shows it is opposite to the direction of velocity.

So this is the case of decreasing velocity which is known as deceleration.

So correct answer is

deceleration

A person is trying to lift a crate that has a mass of 30 kg. The normal force of the floor is currently supplying 150 N of force. How much force is the person currently exerting?

144

150

294

294

Answers

Final answer:

The person is exerting an equal force of 150 N against the crate, as per Newton's Third Law of Motion, meaning the force exerted by the person is equal to the normal force of 150 N.

Explanation:

To determine how much force a person is currently exerting to lift a crate with a mass of 30 kg, given the normal force supplied by the floor is 150 N, we need to consider the equal and opposite force applied by the person. According to Newton's Third Law of Motion, if the normal force acting upward from the floor is 150 N, then the person must be exerting an equal amount of force in the opposite direction, which would also be 150 N in order to maintain static equilibrium (assuming no other vertical forces are acting on the system, such as acceleration or additional weights).

 HURRY PZZ 30PTS

Which of the following characteristics differentiates an autotroph from a heterotroph? Question 1 options: An autotroph can only obtain its energy from a heterotroph. An autotroph must obtain its energy from a heterotroph or other autotroph.. Heterotrophs only obtain their energy from the Sun. A heterotroph must obtain its energy from an autotroph or other heterotroph. Autotrophs only obtain their energy from the Sun. A heterotroph can only obtain its energy from an autotroph.





If someone told you they had a career in either ecology, paleontology, or botany, what area of science is this?
Question 2 options:


astronomy


biology


physics


chemistry

Which of the following statements is true for all living things (organisms)?
Question 3 options:


None of The Above


All living things are made up of one or more cells.


All living things have organs.


All living things produce their own food.

How are these related: human, mold, bacteria?
Question 4 options:


They are all protists.


They are all organisms.


They are all Domain Bacteria.


They are all Kingdom Animalia.

What would happen if several salmon in an area were only able to lay 100 eggs instead of what they normally lay?
Question 5 options:


Nothing. The population will most likely stay the same.


The population will most likely die out since most of the eggs are usually eaten and destroyed.


The population will most likely decrease some but the salmon will still survive in the area.


The population will most likely increase dramatically since fewer eggs means better eggs

An organism that has been thriving, has died. Which of the following is NOT a cause of its demise?
Question 6 options:


appropriate enviornment


soil


food


water

The leaves on a green plant soak up sunlight to make food. A cow's stomach digests grass that was eaten. How are these alike?
Question 7 options:


They are both show how organisms continue growth.


They both show how organisms use metabolism.


They are both examples of heredity in organisms.


They are both ways organisms maintain homeostasis.


While exercising, the body releases sweat. Which of the below is a reason this occurs?
Question 8 options:


None of the Above


Homeostasis


Metabolism


Survival of the fittest

Based on the classification system, which subgroup would you find at the bottom?
Question 9 options:


Class


Phylum


Domain


Species

You are taking a walk in the woods. You come upon a butterfly with coloring and other features you have not seen before. You want to find out its scientific name so you can tell your friends and family about it, and they can look it up. It would be best to use what to determine this?
Question 10 options:


Classification system


dichotomus key


Google


science book

Who developed a system of classifying organisms by genus and species?
Question 11 options:


Watson


Mendel


Linnaeus


Darwin

Answers

Autrotrophs obtain their energy from the sun


Biology


All living things have. Organs



Answer:

Q1: A heterotroph can obtain its energy by consuming another autotroph or a heterotroph.

Q2: Biology.

Q3: All living things are made up of one or more cells.

Q4: They are all organisms.

Q5: The population will most likely die out since most of the eggs are usually eaten and destroyed.

Q6: Appropriate environment.

Q7: They are both ways organisms maintain homeostasis.

Q8: Homeostasis.

Q9: Species

Q10: Dichotomous key.

Q11: Carolus Linnaeus

two objects each weighing 2kg are lifted through the same distance in 4s and 1s respectively. which scenario requires more work?

Answers

i believe it would be the same because time doesn't matter when calculating total work done.

Work=FxD

F=force

D=distance


Final answer:

The scenario that requires more work is when the force applied is greater.

Explanation:

Work is defined as the product of force and displacement.

The work done on an object is given by the formula: work = force × distance × cosine(θ), where θ is the angle between the force and displacement vectors.

In this case, both objects are lifted through the same distance. Therefore, the work done on each object is equal to the force applied to lift the object multiplied by the distance lifted.

The time taken to lift the object does not affect the work done.

So, the scenario that requires more work is when the force applied is greater.

What is the appropriate unit of measurement for pitch?

Answers

The appropriate unit of measurement for pitch is mel.

There are several definitions of 'pitch', but I think you mean how 'high' or 'low' a sound sounds to our ear.  

If that's it, then you're talking about the frequency of the sound, and the unit is 'vibrations per second' or 'Hertz' (Hz) .

Which of the following must be true about an object for it to be in uniform circular motion? A.It must have zero centripetal acceleration. B, It must have increasing centripetal acceleration. c. It must be moving at a constant speed. D. It must be moving with a constant velocity.

Answers

Answer:

It must be moving at a constant speed

Explanation:

When an object move in a circular path, its motion is called uniform circular motion. The object moves with constant speed but the direction always changes. We know that the rate of change of velocity is called acceleration of the object.

In circular motion, the centripetal acceleration act towards the center of circle. The force acting on the object is called centripetal force. It is given by :

[tex]F_c=\dfrac{mv^2}{r}[/tex]

Hence, the statement that is true about an object to be in uniform circular motion is (C) " It must be moving at a constant speed".

The following must be true about an object for it to be in uniform circular motion C. It must be moving at a constant speed.

What happens in uniform circular motion

In uniform circular motion, an object travels in a circular path at a constant speed, but its velocity is not constant because the direction of the velocity is constantly changing.

The centripetal acceleration is directed toward the center of the circle and is responsible for keeping the object in its circular path, but the object's speed remains unchanged.

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Which is a nonrenewable resource for the production of nuclear energy?
A.coal
B.natural gas
C.geothermal
D.uranium

Answers

D. Uranium

Hope this helps :)

Answer:

It is Uranium.

Option (D)

Explanation:

Uranium is a radioactive substance.

When uranium is bombarded with neutrons it emits very large amount of energy along with some stable substances. The energy emitted s called nuclear energy.

The reaction is given by

Give an example of a scientific hypothesis. Explain how you would test it, and how it could be falsified (proved untrue).

Answers

my hypothesis is that If you drop a piece of buttered toast, it will land butter side down.


I tested it by dropping 10 pieces of buttered toast off the table and noted on which side it landed


It could be falsified cause I just made all of this up. In essence, it's like flipping a coin, 50/50 chance so I could say that 5 landed butter up and 5 landed butter down.

A scientific hypothesis, such as 'Plant growth is positively affected by the presence of light', must be testable and falsifiable. It is tested and potentially falsified through controlled experiments, where one group is exposed to the variable under question while the other is not. Science advances by testing and potentially disproving such hypotheses, never claiming absolute proof.

Example of a Scientific Hypothesis and Testing

A scientific hypothesis is a proposed explanation for a phenomenon that is testable and falsifiable. An example of a hypothesis could be: 'Plant growth is positively affected by the presence of light'. To test this hypothesis, you could conduct an experiment with two groups of plants: one group, the experimental group, would be exposed to light, while the control group would not. Plant growth can be measured over a period to determine the effect of light. The hypothesis would be falsified if the plants in darkness grew as well or better than the plants exposed to light.

Falsifiability

Falsifiability is a core principle in science, ensuring that hypotheses can be disproven. A non-falsifiable hypothesis, such as 'Red is a better color than blue', cannot be tested or disproven, and thus is not scientific. Falsifiable hypotheses contribute to the scientific method by ensuring that they can be subject to empirical testing. If ongoing tests and experiments consistently fail to disprove a hypothesis, it gains support as a valid explanation until potentially falsified by future research.

Please help with 3 questions about acceleration

Answers

A great, helpful, useful definition of acceleration is

A = (change in speed) / (time for the change) .   <== you should memorize this

This simple tool will directly solve all 3 problems.

The REASON for assigning these problems for homework is NOT to find the answers.  It's to help YOU find out whether you know this definition, to let you go back and review it if you don't, and to give you a chance to practice using it if you do.  Noticed that if you get the answers from somebody else, you lose all of these benefits.

The only wrinkle anywhere here is in #3, because when you use this definition,      the unit of time has to be the same in both the numerator and the denominator.  

So for #3, you have to EITHER  change the km/hr to km/sec, OR change the 4sec to a fraction of an hour, before you plug anything into the definition.

The angle between magnetic north and the north to which a compass needle points is known as magnetic declination.


Please select the best answer from the choices provided

T
F

Answers

From among the choices provided, the better choice is the upper-case letter 'T '.  That symbol can conveniently be used to represent the words "true" or "truth", which is exactly the reason that it is the better choice for a response, since the complicated statement at the beginning of the question is completely true in its every detail, nuance, jot and tittle.  

Answer:

it is true my child

Explanation:

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