The net force is 46 N to the left.
We need to know about force resultant to solve this problem. The force resultant is the total net force applied to the object according to the direction. It can be written as
R = F1 + F2 + ... + Fn
where R is force resultant (net force)
From the question above, we know that
(Assume that the right direction is positive and left direction is negative)
F1 = -175 N
F2 = 234 N
F3 = 75 N
F4 = -225 N
F5 = 45 N
By substituting the following parameters, we can calculate the net force
R = F1 + F2 + F3 + F4 + F5
R = -175 + 234 + 75 - 225 + 45
R = -46 N
Hence, the net force is -46 N
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Complete combustion of 5.20 g of a hydrocarbon produced 16.6 g of co2 and 5.95 g of h2o. what is the empirical formula for the hydrocarbon? insert subscripts as necessary.
When a hydrocarbon (CxHy) burns, CO₂ and H₂O are produced. C₄H₇ is the empirical formula.
moles of carbon in the mixture: 44 g x 1 mol C/mole/27.8 g CO₂ x 1 mol CO₂ in the compound, CO₂ equals 0.632 moles of C and 0.632 moles of H. 9.96 g H₂O times 1 mol H₂O and 18.g H₂O times 2 mol H/mol H2O equal 1.11 moles of H.
Total mass equals 8.69g (close enough to 8.70 so our assumption of no oxygen is correct)
We can divide both by the lowest value (0.632) to arrive at the lowest whole number of moles.
..
1.0 moles = 0.632/0.632 moles of C. H = 1.11/0.632=1.75
Now we can multiply both by 4 to get H as a whole number.
..
Molecules C = 4 Molecules H = 7
Empirical equation: C₄H₇
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Assume you have three resistors, r1 = 5 w, r2 = 10 w, r3 = 15 w. you connect them in parallel. what would be the equivalent resistance of the combination?
The equivalent resistance of the combination is 30ohms
When two nodes share terminal connections, resistors are said to be in parallel. The smallest parallel resistor is smaller than the equivalent overall resistance. To find the equivalent resistance, after adding the reciprocal values together, take the reciprocal once more.
So, [tex]\frac{1}{R} = \frac{1}{R_{1} } +\frac{1}{R_{2} } +\frac{1}{R_{3} }[/tex]
[tex]\frac{1}{R} = \frac{1}{5} } +\frac{1}{10} } +\frac{1}{15} }[/tex]
[tex]\frac{1}{R} = \frac{1}{30} }[/tex]
R = 30 ohms
Therefore, the equivalent resistance of the combination is 30ohms.
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2m east, then 3m north, then 4m west
What the total distance travelled and the net displacement?
The net displacement is obtained to be 3.6 m.
What is the net displacement?We know that distance is a scalar quantity and displacement is a vector quantity. Based on this fact, a scalar has a magnitude but lacks direction while vector has both magnitude and direction.
We know that the total distance could be obtained algebraically since distance is a scalar quantity hence we have the total distance as; 2 m + 3m + 4m = 9 m
The net displacement must be obtained geometrically;
Horizontal component of displacement = 4 m - 2m = 2m
Vertical component of displacement = 3m
Net displacement = √2^2 + 3^2
= 3.6 m
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Infer the importance of publishing the results of scientific testing
and analysis.
Publishers have the duty of supplying a platform for the exchange of medical data, whilst at the identical time, it's miles the duty of the authors, analysis magazine editors, and peer reviewers to ensure that the posted manuscripts are accurate.
It is through publication that the research, inclusive of their scientific and sensible contributions, is disseminated to others on a particular subject. This makes medical researchers and practitioners with comparable pastimes aware of the latest expertise in their field and it facilitates advanced know-how and its utility. at the same time as many editors and peer reviewers expect that studies posted in their journals have to be probably reproducible, there are no set methods to empirically check whether a finding may be independently reproduced.
A chief supply of irreproducibility additionally testing consists of widespread systematic blunders, that can arise while scientists are engaged in the experiments or all through statistical analyses Goodman et al 2016. Systematic errors can occur for a ramification of reasons, such as loss of medical talent two people acting in the same experiment may not have the same level of revel in or variability in issue populations or reagents Capes‐Davis & Neve, 2016. similarly, whilst a researcher has an insufficient statistical understanding or there are honest flaws inside the experimental layout and statistical output, the mistakes generated might inappropriately have an effect on the translation of the results Baker, 2016 Steen Casadevall, Fang 2013.
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Conducting a walking experiment, you walked 10 m in 5.7 s. what is your walking speed
My walking speed is 1.75 m.
What is speed?Speed can be defined as the ratio of distance to time.
To calculate the walking speed, we use the formula below.
Formula:
S = d/t........................... Equation 1Where:
S = Walking speedd = Total distancet = TimeFrom the question,
d = 10 mt = 5.7sSubstiotute these values into equation 1
S = 10/5.7S = 1.75 m/sHence, my walking speed is 1.75 m.
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The maximum current that a 2w, 80 k resistor can safely conduct is:_________
(a) 160 ka
(b) 40 ka
(c) 5 ma
(d) 25 ma
By using power, the maximum current is (c) 5 mA.
We need to know about power to solve this problem. Power is the energy dissipated because of resistance. The magnitude of power is proportional to current and voltage. It can be determined as
P = I . V
where P is power, I is current and V is voltage.
By using Ohm's Law, power also can be calculated using resistance.
P = I² . R
where R is resistance.
From the question above, we know that
P = 2 W
R = 80 kΩ = 80,000 Ω
By substituting the following parameters, we get
P = I² . R
2 = I² . 80,000
I² = 2 / 80,000
I² = 25 x 10¯⁶ A
I = 5 x 10¯³ A
I = 5 mA
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When a medication alters the velocity of the conduction of electricity through the heart, it is said to have a(n) _____________ effect.
When a medication alters the velocity of the conduction of electricity through the heart, it is said to have a Dromotropic effect.
The word 'dromotropic' originates from the Greek word 'dromos' which means 'race' or 'running'. Dromotropic drugs are cardiac drugs that alter the conducting tissues of the heart, thereby affecting the velocity of the conduction of electricity through the heart.
Dromotropic drugs are given to patients in order to improve heart impulses. They alter the conducting tissues of the heart by changing the travelling speed of the SA node to the AV node.
Dromotropic drugs can either be negative or positive. Negative dromotropic drugs decrease the velocity of the conduction of electricity through the heart, while positive dromotropic drugs increase the velocity of the conduction of electricity through the heart.
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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? Select all that apply.
A. reactivity increases
B. reactivity decreases
C. neon has another shell (energy level, orbit), meaning the atom will be larger
D. sodium has another shell (energy level, orbit), meaning the atom will be larger
E. valence electrons in sodium are farther from the nucleus
F. 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, the following which are true include the following:
A. reactivity increases
C. neon has another shell (energy level, orbit), meaning the atom will be larger.
E. valence electrons in sodium are farther from the nucleus
F. atomic number 11 does not have a full electron shell.
What is Periodic table?This is referred to as the tabular arrangement of elements into rows which is referred to as period or column which is referred to as group.
The reactivity increases in this scenario and atomic number 11 does not have a full electron shell because there is one valence electron which means it doesn't have stable octet configuration.
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A 1-kg mass and a 4-kg mass are connected by a (massless) rod that is 2 meters long. where is the center of mass of the system?
The center of mass is located at 1.6 meters from 1 kg mass.
We need to know about the center of mass to solve this problem. The center of mass is the point where total torque is zero. It can be determined by
X = ∑mi.Xi / ∑mi
where m is mass and X is coordinate on the x-axis.
From the question above, we know that
m1 = 1 kg
m2 = 4 kg
L = 2 m
Assume that zero point is from m1. Hence,
X = ∑mi.Xi / ∑mi
X = ( m1 . X1 + m2 . X2 ) / (m1 + m2)
X = ( 1 . 0 + 4 . 2 ) / (1 + 4)
X = 8 / 5
X = 1.6 meters
Hence, the center of mass is located at 1.6 meters from 1 kg mass.
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When the voltage applied at the drain terminal is small, the mosfet channel behaves like a:___.
When the voltage applied at the drain terminal is small, the mosfet channel behaves like a Current controlled voltage source.
An active load is created when the drain and gate of a MOSFET are coupled together, creating a two-terminal device known as a "diode-connected transistor." An active load is created when the drain and gate of a MOSFET are coupled together, creating a two-terminal device known as a "diode-connected transistor." The drain-source (or source-drain) connection of the MOSFET can be made open or connected by adjusting the charge distribution between the gate and body. Both NMOS and PMOS transistors function as switches in this way, but the specifics of the operation vary between the two types.
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What forces are acting on the climber?
Under which circumstances are amino acids metabolized via oxidative degradation?
Under the circumstances of the normal synthesis and degradation of cellular proteins, the amino acids are metabolized via oxidative degradation.
In animals, amino acids undergo oxidative degradation under different metabolic circumstances.
During the process of normal synthesis as well as the degradation of cellular proteins which is otherwise called protein turnover, there occurs some kinds of amino acids that are released from the breakdown of protein and which are not needed for the synthesis of new protein tend to undergo oxidative degradation.
Oxidative degradation is considered an important step in the mechanical catabolism of amino acids which then generates a more metabolizable kind of the amino acid as well as generates ammonia as a byproduct which is toxic. The ammonia generated thus can also be neutralized into urea through the urea cycle.
In general, the normal synthesis and also the degradation of cellular proteins take place so as to make oxidative degradation where amino acids are metabolized.
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What is the symbol, atomic number, # of protons, # of electrons, atomic mass, rounded atomic mass, # of neutrons (show work), and period of: sodium
The properties of Sodium are as follows:
symbol = Naatomic number = 11number of protons = 11number of electrons = 11atomic mass = 22.989769 urounded atomic mass = 23 amunumber of neutrons = 12period: period 3What are elements?Elements are defined as any substance which cannot be split into simpler units aby a ordinary chemical process.
Elements are classified into metal, non-metals and metalloids.
Sodium one of the known 118 elements.
In the period table, sodium has the following properties:
symbol = Naatomic number = 11number of protons = 11number of electrons = 11atomic mass = 22.989769 urounded atomic mass = 23 amunumber of neutrons = 12period: period 3In conclusion, sodium is an element in the periodic table.
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A 16.0 mh inductor is connected across an ac generator that produces a peak voltage of 9.40 v. what is the peak current through the inductor if the emf frequency is 100 hz?
By using inductive reactance, the current is 0.93 A.
We need to know about inductive reactance to solve this problem. The inductive reactance is the internal resistance in the inductor caused by changing current. It can be described as
XL = ω . L
where XL is inductive reactance, ω is angular speed and L is inductance.
The angular speed can be determined by
ω = 2π . f
where f is frequency.
From the question above, we know that
f = 100 Hz
L = 16 mH = 16 x 10¯³ H
V = 9.4 V
By substituting the given parameters, we get
XL = ω . L
XL = 2π . f . L
XL = 2π . 100 . 16 x 10¯³
XL = 10.06 Ω
Find the peak current
V = I . XL
9.4 = I . 10.06
I = 0.93 A
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please help!
will give branliest
The percentage of fe in an iron ii sample was determined by redox titration with cr2o7 calculate the molarity of the standard k2cr207
The molarity is 0.018M and the percentage is 8.46%.
Net ionic reaction is
[tex]$\mathrm{Cr} 2 \mathrm{O}^{2-}+6 \mathrm{Fe}^{2+}+14 \mathrm{H}^{+} \rightarrow 6 \mathrm{Fe}^{3+}+2 \mathrm{Cr}^{3+}+7 \mathrm{H} 2 \mathrm{O}$[/tex]
[tex]$1 \mathrm{~mol}$[/tex] of [tex]$\mathrm{Cr} 2 \mathrm{O} 7(-2)$[/tex] reacts with [tex]$6 \mathrm{~mol}$[/tex]of [tex]$\mathrm{Fe}(2+)$[/tex] to form [tex]$6 \mathrm{~mol}$[/tex]of [tex]$\mathrm{Fe}(3+)$[/tex] and [tex]$2 \mathrm{~mol}$[/tex] of [tex]$\mathrm{Cr}(3+)$[/tex]
Find molarity of [tex]$\mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O} 7$[/tex]
Molarity = moles of[tex]$\mathrm{K} 2 \mathrm{Cr} 207 /$[/tex] Volume of [tex]$\mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O} 7(\mathrm{~L}$[/tex] )
Moles of [tex]$\mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O} 7$[/tex] = grams of [tex]$\mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O} 7 /$[/tex] molar mass of [tex]$\mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O} 7$[/tex]
[tex]$=1.2275 \mathrm{~g} / 294.19 \mathrm{~mol}=0.0042 \mathrm{~g} / \mathrm{mol}$[/tex]
Molarity of [tex]$\mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O} 7=$[/tex] moles of [tex]$\mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O} 7$[/tex]/ Volume of [tex]$\mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O} 7$[/tex](L)
[tex]$=0.0042 \mathrm{~g} / \mathrm{mol} / 0.250 \mathrm{~L}=0.017 \mathrm{M}$[/tex]
Find molarity of [tex]$\mathrm{Fe}$[/tex] (II)
Molarity of [tex]$\mathrm{Fe}(\mathrm{II})=6 \times$[/tex]molarity of [tex]$\mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O} 7 \times$[/tex]volume of [tex]$\mathrm{K} 2 \mathrm{Cr} 2 \mathrm{O} 7 /$[/tex]volume of [tex]$\mathrm{Fe}$[/tex] (II)
[tex]$=6 \times 0.017 \mathrm{M} \times 0.03598 \mathrm{~L} / 0.200 \mathrm{~L}$[/tex]
[tex]$=0.018 \mathrm{M}$[/tex]
Find moles of [tex]$\mathrm{Fe}(\mathrm{II})$[/tex]
Moles of [tex]\mathrm{Fe}($ II) =[/tex]molarity of [tex]$\mathrm{Fe}$[/tex] (II) [tex]$\times$[/tex] volume of [tex]$\mathrm{Fe}$[/tex] (II)
[tex]=0.018 \mathrm{M} \times 0.200 \mathrm{~L}=0.004 \mathrm{~mol}[/tex]
Find mass of Fe(II)
Mass of [tex]\mathrm{Fe}( II )=[/tex] moles of [tex]\mathrm{Fe}( II[/tex]) [tex]\times[/tex] molar mass of [tex]$\mathrm{Fe}(\mathrm{II})$[/tex]
[tex]$=0.004 \mathrm{~mol} \times 55.85 \mathrm{~g} / \mathrm{mol}$[/tex]
[tex]$=0.205 \mathrm{~g}$[/tex]
Find [tex]$\% \mathrm{Fe}(\mathrm{II})$[/tex] in unknown sample
[tex]$$\begin{aligned}\% \mathrm{Fe} &=(\text { mass of } \mathrm{Fe} / \text { weight of unknown sample }) \times 100 \\&=(0.205 \mathrm{~g} / 2.4234 \mathrm{~g}) \times 100 \\&=8.46 \%\end{aligned}$$[/tex]
Molarity is the concentration of a solution expressed as the number of moles of solute dissolved in each liter of solution.concentration is the amount of a substance per defined space. Concentration usually is expressed in terms of mass per unit volume.To know more about MOLARITY visit : https://brainly.com/question/8732513
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To polish leather shoes, people use shoe polish. What does this tell you about the surface of leather?
Answer: Polish creates a thin layer of wax on the surface of the leather which protects the leather from getting wet and undergoing wear and tear. It also has a lubricating effect on the leather keeping it supple and preventing the leather from drying out and cracking
A bag of flour contains 5.00 lbs of flour. you have 3.20 tons of flour. there are 2000lbs per ton how many bags of flour can you make?
If a bag of flour contains 5.00 lbs of flour. you have 3.20 tons of flour. there are 2000 lbs per ton, then there would be 1280 bags of flour that can be made.
What is multiplication?
Finding the product of two or more numbers in mathematics is done by multiplying the numbers. It is one of the fundamental operations in mathematics that we perform on a daily basis.
As given in the problem, if a bag of flour contains 5.00 lbs of flour. you have 3.20 tons of flour. there are 2000lbs per ton,
The number of bags = 3.20*2000/5.00
=1280 bags
Thus, there would be 1280 bags of flour.
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A 6.00 kg ornament is held at rest...
The magnitude of the tension T is = 60N
Calculation of magnitudeThe mass of the object held at rest = 6kg
The angle of the object at rest is = 30°
The magnitude of force F acting vertically downwards = 410N
Acceleration due to gravity= 10m/s²
The magnitude of tension T = ?
Using the formula; 2T sin(α) = m × g
make T the subject of formula,
T = m × g/ 2sin(α)
T = 6 × 10/ 2 sin (30)
T= 60/2 × 0.5
T = 60/1
T= 60N
Therefore, the magnitude of the tension T is = 60N
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A net force of 16 Newtons is acting on a mass of 50 kg. What is the acceleration of the object?
Why do scientists try to replicate and
duplicate a discovery?
Answer:
Replication is vital to science. It helps make science a self-correcting system. Any time a result is surprising, researchers will try to replicate it, to see if the phenomenon is dependable or just a fluke
Explanation:
Write a sequence of mov instructions that will exchange the upper and lower words in a doubleword variable named three. (three = 12345678h three = 56781234h)
The MOV instruction for double word variable three is
mov ax, word ptr three
mov bx, word ptr three+2
mov three, bx
mov word ptr three+2, ax
What is the sequence for the doubleword variable named three (three = 12345678h)?
; initialize DWORD three
three DWORD 12345678h
; move the lower word (5678h) to ax
MOV ax, WORD PTR three
; move the upper word (1234h) to bx
MOV bx, WORD PTR[three + 2]
; move bx to lower word of three
MOV WORD PTR three, bx
; move ax to upper word of three
MOV WORD PTR[three + 2], ax
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An ideal gas is in a sealed container. By what factor does the gas temperature change if the volume is halved and the pressure is tripled?.
Considering the combined law equation the temperature increases by a factor of 1.5.
Gay-Lussac's Law
According to Gay-Law, Lussac's the gas molecules move more quickly as the temperature rises as long as the volume of the container holding the gas remains constant. The pressure then rises as a result of an increase in the number of shocks striking the walls. In other words, the relationship between a gas's pressure and temperature is direct.
In conclusion, when the volume remains constant, the pressure of the gas increases as the temperature rises. Additionally, gas pressure falls as temperature drops.
Gay-law Lussac's has the following mathematical formulation p/T =k so 3 P / T= 1/2 = 3/2 =1.5 =T
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A bottle of wine contains 11.0thanol by volume. the density of ethanol () is 0.789 . calculate the concentration of ethanol in wine in terms of mass percent and molality.
Mass % of ethanol : 8.885
molality of ethanol : 2.12m
Given:
Wine = 11 % ethanol by volume
density of ethanal = 0.789 g/cm3
density of water = 1 g/cm3
let 100 cm3 wine → 11.0 [tex]cm^3[/tex] ethanol, 89.0 [tex]cm^3[/tex] water.
Mass of ethanol = d x V = 0 789 g/cm3 x 11 cm3 = 8.679 cm3
Mass of water = d x Y = 1.000 g/cm3 x 89 cm3) = 89.00 cm3
Total mass of 100 cm3 wine = 8.679+89 = 97.679 cm3
Mass for % of ethanol = 8: 674 X100 = 8.8857 %
Molar mass of ethanol = 46 g/mole
Moles of ethanol = 8.679/46 = 0.1887 mole
Molality of ethanol = 0.1887/0.089 = 2.12 m
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You are trying to find out how high you have
to pitch a water balloon in order for it to burst
when it hits the ground. You discover that
the balloon bursts when you have pitched it
to a height of 13 m.
With what velocity did the balloon hit
the ground? The acceleration of gravity is
9.8 m/s. The positive direction is up, so the
velocity when it hits is negative.
Answer in units of m/s.
The velocity of the body is 15.96 m/s.
With what velocity does it hit the ground?
We know that equations of kinematics could be used to obtain the velocity with which the pitcher would hit the ground. In this case we have the following;
Height of the ball = 13 m
Acceleration due to gravity = 9.8 m/s
Using;
v^2 = u^2 + 2gh
v = final velocity
u = initial velocity
g = acceleration due to gravity
h = height
u = 0 m/s since it was dropped from a height
v^2 = 2gh
v = √2 * 9.8 * 13
v = 15.96 m/s
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One of the statement is the function of electroscope.
a) charging the objects
b) determining the charge
c) creating the charge
d) discharging the object
Help please!
Answer:
Determining the charge. Electroscopes like we all know are used to detect or determine the charge present in an atom.
What are 5 sentences describing how a soccer ball sitting still illustrates Newton's First Law?
A ball sitting still on the pitch obeys Newton's first law.
What is the first law of Newton?According to the first law of the Newton, a body would continue to be at rest or in state of uniform motion unless it is acted upon by an external force.
In this case, we have a football that is sitting still on a pitch. This ball is held by the force of inertia and the forces that act on it are balanced. If on the other hand this ball is not kicked (action of eternal force), it would continue to sit still on the pitch.
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A cross country skier moves 32 meters westward then 54 meters eastward and finally 68 meters westward
Answer: 20 m west
Explanation:
A drag racer starts her car from rest and accelerates at 10.0 m/s2 for the entire distance of 400 m .how long did it take the race car to travel this distance in s? answer key
To travel a distance of 400 m the car will take a time of: 8.944 s
The formulas and procedures we will use to solve this exercise are:
vf = √ (vi² + 2 * a * x)t = (2 * x)/ (vi + vf)Where:
vf = final velocityx = distancet = timevi = initial velocitya = accelerationInformation about the problem:
vi = 0 m/sa = 10.0 m/s²x = 400 mvf =?t = ?Applying the final velocity formula we have:
vf = √ (vi² + 2 * a * x)
vf = √ ((0 m/s)² + 2 * 10.0 m/s² * 400 m)
vf = √ (0 m²/s² + 8000 m²/s²)
vf = √(8000 m²/s²)
vf = 89.44 m/s
Applying the time formula we have:
t = (2 * x)/ (vi + vf)
t = (2 * 400 m)/ (0 m/s + 89.44 m/s)
t = 800 m / 89.44 m/s
t = 8.944 s
What is acceleration?It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2
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226 ra decays into 222rn plus an alpha particle. how much energy is released in this process?
In the process of Alpha decay 226 radium decays into 222 radon plus an alpha particle. In this process the energy released is about 4.6 Mev.
What is Alpha decay?Alpha decay is a type of radio-active decay.Alpha decay is a nuclear decay process in which an unstable nucleus will get changes to another element by eliminating out a particle which is composed of two protons and two neutrons. The ejected particle is known as an alpha particle and is simply a helium nucleus.Alpha particles have a relatively large mass and a positive charge.For example, In the process of Alpha decay 226 radium decays into 222 radon plus an alpha particle. In this process the energy released is about 4.6 Mev.
The number of protons of ra is 88 will be reduced to 86 and the number of neutrons of rn is 38 will be reduced to 36.
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