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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Calculate the height of a cliff if it takes 2. 35 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8. 00 m/s.
The height of a cliff is 8.26 m
What is the equation of motion?Second Equation of Motion - Derivation s = ut + 1/2 ^2 Derivation × We know that Velocity = / Velocity × Time = Displacement Displacement = Velocity × Time If Velocity is not constant (i.e. Velocity keeps on increasing or decreasing).
We changed this for our required
[tex]y_{0}[/tex] = - [tex]V_{0}[/tex]t - 1/2 ^2 (1)
Now, t = 2.35s
a = -9.8 m/[tex]S^{2}[/tex]
Substitute this value in equation (1)
[tex]y_{0}[/tex] = - [tex]V_{0}[/tex]t - 1/2 ^2
[tex]y_{0}[/tex] = -(8.00m/s) (2.355) - 1/2 (-9.8m/s) [tex]2.35^{2}[/tex]
[tex]y_{0}[/tex] = 8.26 m
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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.
A physics student drops a vibrating 440-hz tuning fork down the elevator shaft of a tall building. when the student hears a frequency of 400 hz, how far has the tuning fork fallen?
1. The speed of the source is 34m/s, using Doppler effect.
2. The location of the source at that time ([tex]t_{1}[/tex]) is 3.466s.
3. The time ([tex]t_{2}[/tex]) for sound to travel 58.92 m is 0.173s.
4. Tthe distance the source has fallen in time ([tex]t_{1} + t_{2}[/tex]) is 65m.
A wave's frequency changes in response to an observer moving in respect to the wave source, which is known as the Doppler effect or Doppler shift. It has the name of Christian Doppler, an Austrian physicist who first reported the phenomena in 1842.
Mathematically it is written as;
[tex]f' = \frac{(v+v_{0}) }{(v -v_{s}) } f[/tex]
1. Using doppler effect,
u = 340(440/440-1) m/s
u = 34m/s
Therefore, the speed of the source is 34m/s.
2. y = [tex]u^{2}[/tex]/2g
y = [tex]34^{2}[/tex]/2×9.8
y = 58.92m
So, [tex]t_{1}[/tex] = u/g (Using u obtained above from Doppler effect)
[tex]t_{1}[/tex] = 34/9.8
[tex]t_{1}[/tex] = 3.466s
Therefore, the location of the source at that time ([tex]t_{1}[/tex]) is 3.466s.
3. [tex]t_{2}[/tex] = 58.92 / 340
[tex]t_{2}[/tex] = 0.173s.
Therefore, the time ([tex]t_{2}[/tex]) for sound to travel 58.92 m is 0.173s.
4. d = [tex]\frac{1}{2}gt^{2}[/tex]
d = [tex]\frac{(9.81)(3.639^{2}) }{2}[/tex]
d = 65m.
Therefore, the distance the source has fallen in time ([tex]t_{1} + t_{2}[/tex]) is 65m.
The complete question is: A physics student drops a vibrating 440-hz tuning fork down the elevator shaft of a tall building. when the student hears a frequency of 400 hz, how far has the tuning fork fallen?
1.Find the speed of the source from Equ. 15-332.
2.Find the location of the source at that time ([tex]t_{1}[/tex])
3. Find the time ([tex]t_{2}[/tex]) for sound to travel 58.92 m.
4.Find the distance the source has fallen in time ([tex]t_{1} + t_{2}[/tex])
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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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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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[tex] \huge\qquad\underline{{\tt Question : }} [/tex]
How does an induction motor starts ?
[ best answer will get brainliest ]
Answer:
A rotating magnetic field is produced and the rotor begins rotating and the induction motor starts.
Explanation:
[tex]\huge\qquad\underline{{\tt Answer : }} -[/tex]
As the name suggests, the induction motor is started by connecting it directly to three-phase supply. In this method, the motor draws a high starting current (about 4 to 7 times of the rated current) and at low power factor. Therefore, DOL starting is suitable for relatively small motors (up to 10 kW)
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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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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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if a distance vs time graph is a vertical line, how would the velocity vs time graph look?
The sprinter's changing speed, as well as the speed of any other moving object or person, is displayed on a velocity-time graph. The slope of the graph line on a velocity-time graph is used to represent acceleration.
What is meant by acceleration?Velocity's rate of change with time, both in terms of speed and direction. A point or object going straight ahead is accelerated when it accelerates or decelerates. m/s2 is the unit of acceleration. The term "constant acceleration" refers to the pace at which a particle's velocity changes.
Which four forms of acceleration are there?Uniform Acceleration. Non uniform acceleration. Instantaneous Acceleration. The slope of the time-velocity graph determines the rate of acceleration.To know more about acceleration visit:
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SI units for mass length and tempature
Answer: GoodMorning: ) ✨
kilogram (kg)
The SI unit of mass is the kilogram (kg).
Explanation:
Hope this helps: )
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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Agatha is in middle school and she sleeps five hours each night and then struggles the next day at school. How many hours of sleep does Agatha need each night?
A.
6
B.
8
C.
10
D.
12
Agatha requires (c) 10 hours of sleep each night.
Children in middle school ideally require average 9-12 hours of sleep each night. If the number of hours of sleep each night is compromised, it will show effect on the concentration and health of the child.
Because sleep is crucial to your physical health, it is crucial that you receive enough of it every night. For instance, your heart and blood arteries are able to recover and repair themselves as you sleep. An increased risk of heart disease, renal disease, high blood pressure, diabetes, and stroke has been related to chronic sleep deprivation. For the brain and body to operate properly the following day, doctors and specialists advise children to receive at least 9 to 12 hours of sleep each night.
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How many combinations total would you observe for this individual heterozygous for 3 genes on 3 differnt chromsomes?
It is feasible for a human to be heterozygous for the following gametic combinations if three genes on three distinct chromosomes are involved:
If chromosome 1 is present, the person can create 2 different types of gametes. Regarding chromosome number 2, there are also two types. The resulting equation is:
There are 2n different types of gametes, where n is the total number of chromosomes. So,
2^3 = 8.4X10^6 different gametes.
The thread-like components known as chromosomes are found in the nucleus of both animal and plant cells.
Protein and a single molecule of deoxyribonucleic acid make up each chromosome (DNA). DNA is passed down from parents to children and contains the precise instructions that give each kind of living thing its individuality.
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which of the five zones shown on the map has the greatest amount of land area suitable for people to live?
I have to get it done right now
The zone in the map that has the greatest amount of land area suitable for people to live is zone B.
What is equator?The equator is the imaginary line that divides the earth horizontally into two equal halves of North and South zones.
The countries that are located close to the equator include the following:
Ecuador, Colombia,
Brazil, Sao Tome & Principe, Gabon, Republic of the Congo, Democratic Republic of the Congo, Uganda, Kenya, Somalia, Maldives, Indonesia and Kiribati.From the map, the zone with the greatest amount of land area suitable for people to live is the zone closest to the equator which is zone B.
The temperature of these areas are close to moderate through out the year.
The zone B also contains land mass that is part of the largest continent which is Asia.
Therefore, the zone in the map that has the greatest amount of land area suitable for people to live is zone B.
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in the description of the features for a new car model it says that it can reach a maximum speed of 180 km/h. If it moves at that speed, how far will the car travel in 3 h?
If it moves at given speed, the car travels, d = 540 km in 3 hours.
Equation :s = d / t
where,
s is speed
d is distance
t is time
So given data are :
s = 180km/h
t = 3 hour
d = ?
Now putting values,
speed = distance / time
180km/h = d / 3 h
d = 180 km/h x 3 h
d = 540 km
Speed :A scalar quantity, speed is defined as the size of the change in an object's position over time or the size of the change in an object's position per unit of time. Speed is calculated as Distance x Time. Time is calculated as Time = Distance / Speed. Distance is calculated as Distance = Speed x Time.
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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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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:
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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FAST HELP PLS
Which equation represents how the kinetic energy (KE) of a system relates to its gravitational potential energy (GPE) and total mechanical energy (ME)?
A.
KE = ME + GPE
B.
KE = GPE × ME
C.
KE = GPE - ME
D.
KE = ME - GPE
The equation represents how the kinetic energy (KE) of a system relates to its gravitational potential energy (GPE) and total mechanical energy (ME) is: KE = ME - GPE; option D
What is the law of the conservation of energy?The law of conservation of energy states that in a system, the total energy is conserved. This means that energy is nether created nor destroyed but can be transformed from one form to another.
The total mechanical energy in a system is composed of two parts:
gravitational potential energy, and kinetic energy
Mathematically;
Mechanical energy, ME = gravitational potential energy GPE + kinetic energy KEThus the equation represents how the kinetic energy (KE) of a system relates to its gravitational potential energy (GPE) and total mechanical energy (ME) is KE = ME - GPE
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The North American and European continents are moving apart at a rate of about 3 cm/y. At this rate how long will it take them to drift 480 km farther apart than they are at present?
It will take them 16000000 years to drift 480 Km apart
What is Rate?In this context, rate is defined as distance per unit time Mathematically, it can be expressed as:
Rate = distance / time
How to determine the time taken to drift 480 Km apartFrom the question given, the following data were obatined:
Rate = 3 cm/yDistance = 480 Km = 480 × 100000 = 48000000 cmTime =?The time taken to drift can be obtained as follow:
Rate = distance / time
3 = 48000000 / time
Cross multiply
3 × time = 48000000
Divide both side by 3
Time = 48000000 / 3
Time = 16000000 years
Thus, it will take 16000000 years to drift 480 Km apart
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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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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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Calculate the power used in the problem above if to took one minute to lift the load.
The power used in the problem above if to took one minute to lift the load is W / 60 Watts
W = F * d
P = W / t
W = Work done
F = Force
d = Distance
t = Time
P = Power
t = 1 min
t = 60 seconds
P = W / 60 ( or ) F * d / t
Power is the work done rate with respect to time. Its unit is Watts. 1 watt = 1 Joule / Second. It is denoted by P.
Therefore, the power used is W / 60 Watts
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A commuter backs her car out of her garage with an acceleration of 1.66m/s2.
a) How long does it take her to reach a speed of 2.28m/s?
b) If she then brakes to a stop in 0.86s, what is her acceleration?
The time taken by her to reach a speed of 2.28m/s is 1.37 s whereas, the acceleration on break to stop in 0.86s is 4.47 m/s².
Equation :( a ) To find the time we use the formula,
a = Δv / Δt
where,
a is acceleration,
Δv is change in speed
Δt is time
So with this putting the given value,
We have,
1.66m/s² = 2.28m/s / Δt
Δt = 2.28m/s / 1.66m/s²
Δt = 1.37 s
( b ) Again using same formula for acceleration
a = Δv / Δt
So,
a = 2.28m/s / 1.37 - 0.86s
a = 2.28m/s / 0.51 s
a = 4.47 m/s²
What is acceleration and velocity?The rate of change of displacement is known as velocity. The rate at which velocity changes is called acceleration. Due to the fact that it includes both magnitude and direction, velocity is a vector quantity. As the rate at which velocity changes, acceleration is also a vector quantity.
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(a)The time has taken by a commuter to reach a speed of 2.28m/s is (t)= 1.37 s. (b) If she then brakes to a stop in 0.86s,Theamount of acceleration is (a)= 2.65 m/s².
What is acceleration and velocity?The term velocity defines that how much distance a particle covered in a given time. The term acceleration defines that change in velocity in a particular time.
How can we calculate the value of acceleration and velocity?( a ) To calculate the time we use the formula, v=u+at
As the particle start from rest so, u= initial velocity would be zero.
The equation becomes, v=at
t=v/a
where, we are given
a= acceleration of the car =1.66m/s²,
v= speed of the car= 2.28m/s
We have to calculate the time=t
So now we put the given value in the above equation, We have,
t=v/a
Or, t = 2.28m/s / 1.66m/s²
Or, t = 1.37 s
According to the calculation we can say that, The time has taken by a commuter to reach a speed of 2.28m/s is (t)= 1.37 s
( b ) To calculate the acceleration we use the formula, v=u+at
As the particle start from rest so, u= initial velocity would be zero.
The equation becomes, v=at
a=v/t
where, we are given
v= speed of the car= 2.28m/s
t= The time take to break=0.86 s
We have to calculate the acceleration=a
So now we put the given value in the above equation, We have,
a=v/t
Or, a = 2.28 /0.86
Or, a = 2.65 m/s²
According to the calculation we can say that, If she then brakes to a stop in 0.86s,Theamount of acceleration is (a)= 2.65 m/s²
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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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A light-rail commuter train accelerates at a rate of 1.40 m/s2. how long does it take to reach its top speed of 76.5 km/h, starting from rest?
It takes 15.17s time to reach its top speed.
CalculationVo = 0m[tex]s^{-1}[/tex]
Its top speed v = 76.5 km/h
= 21.25 m/s
acceleration of the train = 1.4 m/[tex]s^{2}[/tex]
Then
V = Vo +at
21.25 = 0+ 1.4t
t = 21.25/ 1.4 = 15.17 s
AccelerationThe rate at which an object’s velocity with respect to time changes is referred to as acceleration in mechanics. They are vector quantities, accelerations.
The direction of the net force applied on the item determines the object’s acceleration.
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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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An inorganic compound, when placed in water, dissociates 99orming cations and anions neither of which are:______
Neither are Strong acid.
What does “strong acid” mean?In the solution, solid acids entirely separate into ions. For instance, hydrochloric acid is a solid acid.
It totally ionizes, forming hydrogen and chloride ions. Nitric acid and sulfuric acid are also components of strong acids.
A solid or strong acid is one that has completely dissociated into ions. It is a weak acid if it does not dissociate completely.
What is an example of a strong acid?Chloric acid, hydrobromic acid, hydrochloric acid, hydroiodic acid, nitric acid, perchloric acid, and sulfuric acid are the seven major acids that make up strong acids. These are referred to as strong acids since they can totally dissociate in water.
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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:
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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