Answer:
Explanation:
which of the following has the smallest particles
The net work done in accelerating a propeller from rest to an angular velocity of 200 rad/s is 2000 j. what is the moment of inertia of the propeller?
The moment of inertia of the propeller will be "0.3058 k.gm²"
Given.
Angle of rotation, = 124 rad/s
Work completed, W = 2351.3 J
The Work-Energy Principle is used as,
Kinetic energy Equals Net work done; (W) = (K.E)
We are aware,
→ K.E = × l × ω²
then,
→ W = × l × ω²
By exchanging the values, we obtain
2351.3 = × l × (124)²
thus, The moment of inertia,
I = 2351.3 × 2/[tex]124^{2}[/tex]
= 0.3058 k.gm²
The moment of inertia of the propeller will be "0.3058 k.gm²"
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Given the height of the platform and each cannon’s launch velocity, what is the correct ranking, from greatest to least, for the range traveled by each cannonball?.
You need to do the necessary calculations and check how they can be ranked.
This question lacks numerical data which keeps someone from giving a precise answer but guidance could be given so that you can follow them to get the required answer.The starting height is given for each cannon, say ([tex]h_1\,\,\&\,\,h_2[/tex]).The velocities are also given. Since it is velocity, not just the speed you should be given both their magnitude ([tex]v[/tex]) and the shooting angle ([tex]\theta[/tex]).If the angle is not given, then you cannot get an answer.Then what you need to do is simply use the formula designated to find the horizontal range which is [tex]R = \frac{v^2}{g}\sin2\theta[/tex].The [tex]g[/tex] is a known quantity which is the gravitational acceleration and simply substitute the other values and see which cannon shoots the cannonball farther.#SPJ4
Given+the+voltage+for+a+capacitor+is+discharge,+how+many+time+constants+does+it+take+for+the+voltage+to+equal+1.0+%+of+the+initial+value+or+the+maximum+value+vo?
For all practical purposes, the capacitor will have nearly all of its voltage discharged after 5-time constants. Although it never completely discharges to 0 volts, a capacitor does come extremely nearby.
A capacitor does not hold charges, if by charges you mean electric charges. This is a typical misunderstanding, maybe as a result of the term charge's various interpretations. A capacitor's terminals exchange an equal amount of charge when a charge is applied to one of them. The capacitor's overall charge is constant. They save it specifically in an electric field. All of the protons are drawn to all of the electrons. On each capacitor plate, the protons and electrons are distributed equally at equilibrium.
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Moving from the element with atomic number 10 to atomic number 11 on the periodic table, there is a change in reactivity. Which of the following are true? You MUST select ALL correct answers to earn full credit for this question.
reactivity increases
reactivity decreases
neon has another shell (energy level, orbit), meaning the atom will be larger
sodium has another shell (energy level, orbit), meaning the atom will be larger
valence electrons in sodium are farther from the nucleus
atomic number 11 does not have a full electron shell.
Moving from the element with atomic number 10 to atomic number 11 on the periodic table changes observed are :
Reactivity increases,
Sodium has more shell,
Valence electrons in sodium are farther from the nucleus,
Atomic number 11 does not have a full electron shell
Atomic number in periodic table :In increasing order of atomic number, the elements are listed. The amount of protons in an atom's nucleus is indicated by its atomic number. An element's identity is determined by its proton count. The number of protons determines an element's identity.
What is relativistic effect in periodic table?The indirect relativistic effect amplifies the decreases in the binding energies of the valence d and f electrons as they move down the periodic table. As a result, the d electrons in the heavier coinage metals become more chemically active, leading to higher oxidation states in these elements.
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a sound wave generated by a musical note has the characteristics presented in the table. what is the missing value? medium: Air, glass, brass, Wave speed (m/s): 346, 5,640, 4,700, Frequency (hz): 55, 55, 55, Wavelength (m): 6.3, 102, ?
The missing value of medium Air, glass, brass, Wave speed m/s 346, 5,640, 4,700, Frequency Hz 55, 55, 55, and Wavelength m 6.3, 102, is 85.
The frequency of a sound wave is what your ear understands as pitch. A better frequency sound has a better pitch, and a lower frequency sound has a decreased pitch. There are five essential traits of sound waves wavelength, amplitude, frequency, time period, and speed. The wavelength of a legitimate wave shows the gap that the wave travels earlier than it repeats itself. The wavelength itself is a longitudinal wave that shows the compressions and rarefactions of the sound wave.
Sound waves may be defined by way of five traits Wavelength, Amplitude, Time-period, Frequency, and pace or velocity. The minimum distance in which a sound wave repeats itself is known as its wavelength. that is it is the duration of one complete wave. Pitch. The musical term for frequency is pitch. The better the frequency, the better the pitch. the velocity of sound, the velocity at which sound waves propagate thru exclusive substances. the modern fee for the velocity of sound is 331.29 meters 1,086.nine toes in keeping with a second.
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An object is thrown 16 m/s straight up from a 7 m tall cliff. How much time does it take to hit the ground below?
An object is thrown 16 m/s straight up from a 7 m tall cliff. 5.73 seconds time does it take to hit the ground.
From the statement, We have object thrown straight up from a tall cliff and we have to determine how much time does it take to hit the ground below.
initial velocity [u] = 16 m/s
Height of cliff [h] = 7 m
Time taken by the object to attain maximum height with reference to cliff-
v = u + at
0 = u - gt
u = gt
t = u/g = 16/9.8 = 1.63 seconds
Maximum height attained with reference to cliff will be =v² - u² = 2aS
v = 0 [at maximum height]
-u² = - 2gS
u² = 2gS
S = u²/2g = (16 x 16)/(2 x 9.8) = 13.1 meters
Now, the all distance covered by the ball from maximum height untill it reaches the ground =
Downward distance (Max. height to cliff) + 7 m = 13.1 + 7 = 20.1 m
Now, time took from top to reach the ground will be -
S = ut + 1/2 at²
S = 0 + 1/2 at²
S = 1/2 at²
t [2] = √2S/g = √(2 x 20.1)/(9.8) = 4.1 s
Hence, the time taken by the ball to hit the ground below will be =
1.63 + 4.1 = 5.73 seconds
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A 2300-kg car slows down at a rate of 3.0 m/s2 when approaching a stop sign. what is the magnitude of the net force causing it to slow down? (numerical value only) *
The magnitude of the net force causing the car to slow down is 6900 N.
We need to know about force to solve this problem. According to second Newton's Law, the force applied to an object will be proportional to mass and acceleration. Hence, it can be written as
F = m . a
where F is force, m is mass and a is acceleration
From the question above, we know that
m = 2300 kg
a = 3 m/s²
By substituting the given parameters, we can calculate the net force
F = m . a
F = 2300 . 3
F = 6900 N
Hence, the net force causing to slowdown is 6900 N
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How does a firefighter use science
Answer:
Small Devices
Explanation:
firefighters wear small electronic devices that transmit to a location at a command system.
A book is placed on a table and a bike moves on a road. Which statement is correct? (3 points) a Both the book and the bike have kinetic energy. b Both the book and the bike have potential energy. c The book has potential energy and the bike has kinetic energy. d The book has kinetic energy and the bike has potential energy.
c . The book has potential energy and the bike has kinetic energy statement is correct
What are some illustrations of kinetic and potential energy?Let's use an illustration to demonstrate P. E. and K.E. The hammer has potential energy, which it will have as you raise it higher. On the other hand, the hammer will have kinetic energy when you lower it to strike the surface of the table.
Only chemical energy, which is potential energy held inside the item and in the union of its atoms and molecules, is not regarded as kinetic energy. Motion is created by kinetic energy. Any item in motion has kinetic energy. The more kinetic energy an item possesses, the heavier and quicker it moves. The wheels of a bicycle spin when you push off the pedals.
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Describe the balance found between two different forces in middle-aged stars. What two forces are balanced? Where do they come from? (What creates those forces?)
The balance of star's equilibrium is essentially brought about by two forces. These forces are the star's inner gravitational pull and the thermal energy produced by fusion processes' outward pressure push. These two forces prevent a star's collapse and constantly maintain a star in equilibrium.
A star's equilibrium with respect to gravity is governed by two forces. These two forces are distinguished as the star's gravity and its outward pressure push, respectively. It is a self-regulating and stable process that keeps the stars in this equilibrium.
star's equilibrium is the term used to describe this state of the stars. The fusion events occurring in a star's core produce an outward pressure force.
From the high-pressure core to the low-pressure surface, which is balanced by inward gravity, is the direction of pressure force in stars.
A star will experience a rise in internal gravity if we add more matter to it, which is again counterbalanced by internal pressure to maintain the star stable.
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what is the change in velocity of a car that starts at rest and has a final velocity of 20 m/s north
P.S. m/s means "meters per second".
Answer:
20 m/s
Explanation:
the final velocity of the car = 20 m/s
Change in the velocity = final velocity - initial velocity
Change in the velocity= 20 - 0
= 20 m/s
Thus, the change in the velocity would be 20 m/s.
A pressure of 10 mm hg is measured using a constant volume gas therometer at tem of 50 c what is the pressure in (mmhg at the zero point
The calculated pressure is 55 KPa.
The amount of force delivered perpendicularly to an object's surface in relation to its area is known as pressure. Its abbreviation is "p" or "P." An isochoric process in thermodynamics is a thermodynamic process in which the volume of the closed system experiencing the process remains constant. It is also known as a constant-volume process, isovolumetric process, or isometric process.
At the triple point of water, a constant volume gas thermometer registers a pressure of P tr = 40 kPa= 40 *10³ Pa.
Water's boiling point is T=100°C=373.16K.
Let P represent the pressure at the water's boiling point.
The temperature pressure relation for a constant volume gas thermometer is provided below:
T= P/ Ptr *273.16K
P= 273.16 TP tr
= 273.16 /373.16*40*10³
=54620Pa
=5.42*10³ Pa ≅ 55 KPa
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Delivery contains 24 light bulbs out of which 3 are defective. if a person selects 10 lightbulbs at random without replacement, what is the probability that exactly 2 defective bulbsare selected?
With the concept of Probability the chance of getting exactly 2 defective bulbs is 0.311
What is Probability?Probability is the branch of mathematics which deals with the determination of the chance or likeliness of an event to occur. Probability may be defined as the ratio of favorable outcomes to the total number of outcomes in an event, mathematically,
[tex]Probability( X)=\frac{F}{T}[/tex]
where,
[tex]F[/tex] = favorable outcomes for a random event X.
[tex]T[/tex] = total outcomes for a random event X.
X = Random event.
Here in the question, there are 24 light bulbs out of which 3 are defective. A person picks 10 bulbs at random, in which we have to find the probability that he selects exactly 2 light bulbs.
So, here the event is X = exactly 2 bulbs are defective out of 10 bulbs.
Now, using Combination, the total number of outcomes possible are,
T = ²⁴[tex]C[/tex]₁₀
The total number of favorable outcomes are,
F = ³[tex]C[/tex]₂ײ¹[tex]C[/tex]₈
The probability of the event X will be,
P(X) =³[tex]C[/tex]₂ײ¹[tex]C[/tex] / ²⁴[tex]C[/tex]₁₀
P(X) = 0.311
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cAN A central force give rise to a torque about that point
Answer:
In rectilinear motion F = M a describes the motion of a particle
Γ = I α (torque equals moment of inertia times angular acceleration is the equivalent law in circular motion)
A fixed central force is perpendicular to the direction of motion and cannot change the torque about the point. (for mechanical forces)
However, for electrical forces, F = Q V X B and a changing magnetic field at the center of motion can produce a force perpendicular to the direction of motion.
Perhaps, the question needs to be more specific.
Approximately 1.0 g of caffeine will dissolve in 28 ml of methylene chloride and in 46 ml of water. calculate the distribution coefficient of caffeine in this solvent system.
The distribution coefficient was found to be 1.61.
First we calculate solubility of caffeine, when dissolved in methylene chloride,
Solubility (in g/ml) = mass of caffeine/volume of solvent
Solubility = 1/28
Now, solubility of caffiene when dissolved in water,
Solubility (in g/mol) = 1/46
Now, we calculate distribution coefficient, (kd) by taking the ratio of the solublities i.e..
Distribution coefficient,(Kd) = solubility of caffeine, when dissolved in methylene chloride / solubility of caffeine when dissolved in water.
Kd= (1/28) / (1/46)
Kd= 1.61
Thus, distribution coefficient was calculated and found to be 1.61.
The distribution coefficient of the solute is defined as the ratio of the concentration of solute dissolved in organic solvent to the concentration of solute dissolved in aqueous phase.
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a hot tub has 4.38x10³ kg of water in it. each water molecule has a mass of 2.98x10-²⁴. how many water molecules are in the hot tub?
The number of water molecules in the hot tub is 1.47×10²⁷ molecules
Data obtained from the questionThe following data were obtained from the question:
Mass of water = 4.38×10³ KgMass of one molecule = 2.98×10⁻²⁴ KgNumber of molecules =?How to determine the number of moleculesThe number of water molecules in the hot tub can be obtained as follow
Number of molecules = Mass of water / mass of one molcule
Number of molecules = 4.38×10³ / 2.98×10⁻²⁴
Number of molecules = 1.47×10²⁷ molecules
Thus, number of molecules in the hot tub 1.47×10²⁷ molecules
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A tank is in the shape of an inverted cone, having height h = 3.31 m and base radius r = 0.799 m. of water is poured into the tank at a rate of 11.8 l/s, how long will it take to fill the tank?
A tank is in the shape of an inverted cone, having height h = 3.31 m and base radius r = 0.799 m. of water is poured into the tank at a rate of 11.8 m/s.
It take to fill the tank
Using the similarity of triangles,
[tex]\frac{0.799}{r} =\frac{3.31}{h} \\r=0.241h[/tex]
Volume of water tank
[tex]V=\frac{1}{3} \pi r^2h\\V=\frac{1}{3} \times 3.14\times (0.241h)^2\times h\\V=0.0608h^3[/tex]
The greenhouse effect occurs because of the absorption and re-emission of _______ radiation by the atmosphere.
The greenhouse effect occurs because of the absorption and re-emission of infrared radiation by the atmosphere.
When visible light from the sun enters the earth, it passes through the atmosphere and is absorbed by materials on the earth's surface like rocks, soil and the ocean, which makes the earth heat up. These materials then re-emit infrared radiation. This radiation gets reabsorbed by certain gases in the atmosphere called greenhouse gases, further keeping the earth warm. This effect is known as the greenhouse effect.
The greenhouse effect is essential for all life on earth, as without it, the earth would be a cold, frozen place. However, the level of greenhouse gases in the atmosphere has increased in recent years, further increasing the temperature of the planet, resulting in what is called global warming.
The greenhouse gases include water vapour, methane, carbon dioxide and ozone.
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you drive your car in a straight line at 15 m/s for 10 km, then at 25m/s for another 10 km. a) is your average speed for the entire trip more than, less than, or equal to 20 m/s ? choose the best explanation from the following: A. More time is spent driving at 15 m /s than at 25 m/s. B. The average of 15 m/s and 25 m/s is 20 m/s. C. Less time is spent driving at 15 m/s than at 25 m/s.
Answer:
The average speed for the entire trip is 18.75 m/s. How is average speed calculated?The average speed is the ratio of total length traveled to total time taken to travel that length.Thus, if then,where Sa is average speed of the traveller.WE cannot average the two speeds in conditions of equal distance. WE need equal time.Here 15 m/s for 10 km would take 666.67 seconds. and 25 m/s for another 10 km would take 400 seconds. The Total time: 1066.67 seconds. The Total distance 20 km. The average speed = 20000 m/1066.67 seconds = 18.75 m/s. If We had gone 15 m/s for the same *time* as going at 25 m/s, then we could have averaged the speeds directly. Hence, The average speed for the entire trip is 18.75 m/s. Learn more about average speed here:brainly.com/question/12322912
Explanation:
Air in a thunderstorm is being heated to temperatures higher than those of the surrounding air by the process of ________, and because of this, the air is ________.
Air in a thunderstorm is being heated to temperatures higher than those of the surrounding air by the process of condensation, and because of this, the air is unstable.
A thunderstorm is a small-scale storm that includes both thunder and lighting. Additionally, it frequently delivers heavy rain as well as violent gusts. Some thunderstorms have a chance of producing hail and/or tornadoes. Localized heavy snow showers during the winter may also include thunder and lightning.
In every region of the country and at any time of the year, severe thunderstorms pose a variety of risks to people's lives and property, including flooding, lightning-induced wildfires, tornadoes, wind, and hail. Warm, wet air rises into cold air, creating thunderstorms. Condensation occurs when the warm air cools, which causes water vapor to condense into tiny water droplets. Lower in the atmosphere, the cooled air rises once more after warming.
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Which replication method would you use for only file changes instead of entire file changes?
I would chose block-level replication use for only file changes instead of entire file changes. Instead of duplicating the whole system configuration, block storage replication is a type of disaster recovery at the individual volume level.
Depending on your environment, you can set replication of each volume across local and remote computers to go either way and in synchronous or asynchronous modes.
However, block storage replication only duplicates data at the level of a specific volume, not the complete system environment. This strategy has a number of benefits.
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A circuit element that hinders the flow of current:
O A. can never be used in a parallel circuit.
OB. increases the energy flow in the circuit.
OC. is called a resistor.
OD. allows excess accumulation of charge.
A circuit element that hinders the flow of current is called a resistor.
Nearly all electronic circuit boards use resistors, which are passive parts. The name "resistor" comes from the resistor's function of exhibiting resistance to current flow.
Resistance is the opposition to the current flow that a resistor exhibits and each resistance is identified by its resistance value in Ohms.Consider a resistor as a basic wire that offers resistance and tries to reduce the passage of electrons, or current, rather than permitting the free flow of electrons through it. Materials like carbon, metal, or metal oxide film are frequently used to make resistors. The kind and quantity of the combination or material that makes up a resistor determines its resistance property. There are two ways to use multiple resistors: in series and parallel.Learn more about resistors here:
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A copper sphere has a mass of (112.25 ± 0.01) g and its radius of (2.50 ±0.02) cm. Find the uncertainty in density. ( Note: the volume of the sphere is V = 4/3 π r3)
The uncertainty in the density is 1.71 g/cm^3 (±0.03)
What is the density?The density of a body is the ratio of the mass to the volume of the copper sphere. We have been given the mass of the copper sphere and its volume thus we can now find the density of the sphere.
Mass = 112.25 g
Volume = 4/3 π r^3 = 4/3 * 3.142 * (2.50)^3 = 65.5cm^3
Density = 112.25 g/65.5cm^3 = 1.71 g/cm^3
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In order to quadruple the amount of lift created by an airfoil, the air velocity must be?
In order to quadruple the amount of lift created by an airfoil, the air velocity must be doubled.
What is airfoil?
A wing, a sail, or the blades of a propeller, rotor, or turbine are examples of objects whose motion through a gas can provide significant lift, and an airfoil or aerofoil is the cross-sectional shape of such an item.
By applying a downward push to the air as it passes, an airfoil produces lift. The air must exert an equal and opposite (upward) force on the airfoil, which produces lift, in accordance with Newton's third law.
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which zone has the highest average temperatures all year round? explain why.
I need help with this ASAP.. it is pass due
The region near Tropic zone has the highest average temperatures all year round because the sunlight comes direct on the tropic zone.
Which zone has high temperature throughout the year?In the regions between the equator and the tropics i.e. equatorial region, the solar radiation reaches directly the land vertically during daytime almost the whole year. The temperature is very hot and warm in these regions. Due to high temperatures, more water evaporates in this region and the air has more moisture and high humidity is present. Sunlight hits the Earth directly at the Equator. The sunlight spread over a large area, when we move from the Equator to the poles the temperature becomes decreases. Sunlight falls on a smaller surface area at the Equator so heats up very quickly as compared to the poles.
So we can conclude that Tropic zone has the highest average temperatures all year round because the sunlight comes direct on the tropic zone.
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Jaycie wants to increase her upper body strength
by doing push-ups. She does one push-up by
applying a force of 10 N to raise her center of
gravity 2 m. How many push-ups must Jaycie
complete to do 200 J of work?
A.
5 push-ups
B. 10 push-ups
C.
15 push-ups
D. 20 push-ups
The 10 push-ups must Jaycie complete to do 200 J of work. If one push-up is applying a force of 10 N to raise her center of gravity 2 m.
Calculation of work done in one push upAs, we know that
W = F × S
where,
F is the force
W is the work done by the body
S is the distance travelled by the body
Given,
F = 10N
S = 2m
By substituting all the values, we get
W = 10 × 2
W = 20J
So, the 20J work is done by one push up.
Therefore,
200/20
= 10 push ups
Thus, we concluded that the 10 push-ups must Jaycie complete to do 200 J of work. If one push-up is applying a force of 10 N to raise her center of gravity 2 m.
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How does the terminal-digit numeric storage method differ from the consecutive numeric storage method?
Unlike the consecutive numeric storage method, which uses each digit as an indexing unit, the terminal-digit numeric storage method divides a number into three groups of digits.
What does terminal-digit numeric storage mean?
The fundamental numeric method might not be practical, so a different option is to use terminal-digit filing, which separates a number into three groups of digits. The goal is to denote primary (first), secondary, and tertiary (final) groupings of numbers. These primary, secondary, and tertiary numbers tell the location of the record.
What does consecutive numeric storage mean?
Each digit serves as an indexing unit in the consecutive storage method, also known as serial or straight number filing. To determine filing order, a number's first digits are compared. Following a comparison of the first two digits, the third digits are evaluated, and so on. The numbers used may be written on the record or may be a component of the record itself, such as a number on an invoice. As each new record is added to the system, the number assigned to it increases.
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how do we know that an atom of gold in a ring and an atom of gold in a dental filling are alike
Gold fillings, also called inlays or onlays, consist of alloys of gold, copper, and other metals. This type of filling is usually the most durable and is considered to last 20 years or more, but it is also the most expensive.
Gold fillings are less common than they used to be, but are still a viable option for obtaining fillings. Gold is durable and resilient, so with proper care, gold fillings can last a lifetime.
Gold is one of the oldest tooth restoration solutions in dentistry and is still used today due to its durability. Gold crowns are rarely used in modern dentistry (except for aesthetic reasons), but gold components are used in combination with other metals such as nickel, chromium, and palladium.
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3
A toy with a parachute falls vertically from the top of a tall building at 3.0 m/s. Wind causes it to move horizontally
at 1.6 m/s.
Figure 1.8
(a) In Figure 1.8, draw a scale vector diagram to show the resultant velocity of the toy. State the scale you have used.
The resultant velocity of the parachute is 3.4 m/s.
What is the resultant velocity?The term resultant velocity refers to the effective velocity with which the parachute moves. We know that velocity is a vector quantity. Recall that a vector is known to have both magnitude and direction.
Given that the magnitude of the resultant vector can only be obtained geometrically we have;
Vertical component = 3.0 m/s
Horizontal component = 1.6 m/s
Resultant velocity = √(3)^2 + (1.6)^2
= 3.4 m/s
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What is the symbol for an atom with three electrons, three protons, and four neutrons?
Atomic electron arrangement is the only factor that affects how they behave chemically.
The electron arrangement is independent of whether an atom contains three or four neutrons. All that matters is how many protons there are and how many electrons there are to match them, which determines how these atoms will behave chemically. When grouping atoms in the periodic table, we designated a box as an element when all of the atoms have the same number of protons (with a corresponding symbol) Thus, the sole difference between the various forms of an element is its number of neutrons; we refer to these forms as the element's isotopes. Both lithium-6 and lithium-7 have three protons and three neutrons.
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