It is false that asteroids were recently formed by the collision and breakup of an object orbiting in the asteroid belt.
Asteroids are stony objects that orbit the sun but are too tiny to be classified as planets. They're also referred to as planetoids or small planets. There are millions of asteroids that range in size from hundreds of kilometers to a few feet. The combined mass of all asteroids is less than that of Earth's moon.
The solar system's makeup is fairly uniform. The combined mass of the planets is substantially less than that of the Sun. The majority of comets have short periods and orbit near the ecliptic plane.
The asteroid belt is a torus-shaped area in the Solar System lying roughly between Jupiter and Mars' orbits. It is home to a large number of solid, irregularly shaped things of various sizes, but far smaller than planets, known as asteroids or minor planets. To distinguish it from other asteroid populations in the Solar System, such as near-Earth asteroids and Trojan asteroids, this asteroid belt is sometimes known as the major asteroid belt or main belt.
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Based on the data provided, the intracellular molarity of dissolved solutes in sweet potato cells is approximately ________.
a) 0.2 m
b) 0.4 m
c) 0.6 m
d) 0.8 m
Answer:
0.4 M
Explanation:
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A water pump with a power of 3.4 × 102 watts lifts water at the rate of 7.5 × 10-2 meters/second from a water tank. What is the force exerted by the pump on the water?
Answer:
P = W / t work / time = power
P = F * S / t
F = P t / S force required
F = P / (S / t) since given .075 meters / sec
F = 340 J/sec / .075 m/sec = 4530 J / m = 4530 Newtons
what is the momentum of a 6300-kg elephant walking 0.11 m/s
Momentum of the elephant is 69.3 kg-m/s
Momentum is a property of a moving body by the virtue of its motion and is a product of mass and velocity.
As per Newton's second law of motion,
momentum= mass x velocity
Mass of the elephant is given as 6300kg
Velocity of elephant is given as 0.11 m/s
Therefore,
momentum = 6300 x 0.11
69.3 kg -m /s
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A car can go from 0 to 60 mph in 6.0 s .assuming that it could maintain the same acceleration at higher speeds, how long would it take the car to go from 0 to 120 mph?
The time taken for the car to reach 120 mph speed is 12 seconds.
Acceleration of the carThe acceleration of the car is the rate of change of velocity of the car with time.
a = Δv/t
where;
t is time = 6 sa = (60 mph) / (6 s)
when the speed increases to 120 mphThe time of motion at the given constant speed is calculated as follows;
t = v/a
t = (120 mph) / (60 mph / 6s)
t = (120 mph x 6 s) / (60 mph)
t = 2 x 6 s
t = 12 seconds
Thus, the time taken for the car to reach 120 mph speed is 12 seconds.
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Signal at least ____ before making a turn.
a) 2 blocks
b) 10 feet
c) 20 feet
d) 100 feet
The correct option is (d) 100 feet
Signal at least 100 feet before making a turn.
Before stopping, turning, or changing lanes, signal to other drivers so they are aware of your impending action. You can signal with your hand, arm, or your car's turn signals and brake lights. You should signal at least 100 feet before your turn so that other vehicles have time to adjust. You should turn from the lane that is closest to the direction you wish to go and into the lane that is closest to the one you came from if there are no signs or lane markers to restrict turning. You'll cross the fewest number of lanes of traffic in this manner. When making turns, switch lanes as smoothly as you can without going over the lane lines or obstructing the flow of traffic.Learn more about the safety driving with the help of the given link:
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A particle moves in a straight line with the velocity function v ( t ) = sin ( w t ) cos 3 ( w t ) . find its position function x = f ( t ) if f ( 0 ) = 0 .
Integrating the velocity equation, we will see that the position equation is:
[tex]$f(t)=\frac{\cos ^3(\omega t)-1}{3}[/tex]
How to get the position equation of the particle?Let the velocity of the particle is:
[tex]$v(t)=\sin (\omega t) * \cos ^2(\omega t)[/tex]
To get the position equation we just need to integrate the above equation:
[tex]$f(t)=\int \sin (\omega t) * \cos ^2(\omega t) d t[/tex]
[tex]$\mathrm{u}=\cos (\omega \mathrm{t})[/tex]
Then:
[tex]$d u=-\sin (\omega t) d t[/tex]
[tex]\Rightarrow d t=-d u / \sin (\omega t)[/tex]
Replacing that in our integral we get:
[tex]$\int \sin (\omega t) * \cos ^2(\omega t) d t$[/tex]
[tex]$-\int \frac{\sin (\omega t) * u^2 d u}{\sin (\omega t)}-\int u^2 d t=-\frac{u^3}{3}+c$[/tex]
Where C is a constant of integration.
Now we remember that [tex]$u=\cos (\omega t)$[/tex]
Then we have:
[tex]$f(t)=\frac{\cos ^3(\omega t)}{3}+C[/tex]
To find the value of C, we use the fact that f(0) = 0.
[tex]$f(t)=\frac{\cos ^3(\omega * 0)}{3}+C=\frac{1}{3}+C=0[/tex]
C = -1 / 3
Then the position function is:
[tex]$f(t)=\frac{\cos ^3(\omega t)-1}{3}[/tex]
Integrating the velocity equation, we will see that the position equation is:
[tex]$f(t)=\frac{\cos ^3(\omega t)-1}{3}[/tex]
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If you exert a force f on an object which has a much greater mass than you do, the force which the object exerts on you will?
If you exert force on an inanimate item, you will also be able to calculate the force that the object will apply to you, which will be opposing and equal to your own.
What would happen if you applied a force that was smaller than the object's mass?In order to accelerate a heavier (more massive) item in motion, more force must be exerted. When two objects are subjected to the same force, the smaller mass item will change speeds more quickly.
An item can alter its size or shape, begin moving, stop moving, accelerate, or decelerate as a result of a force acting on it. When two things contact, they exert pressures on one another that are identical in size but directed in the opposite direction
The action-reaction law is another name for this rule.
When just one body decides the strength and direction of the force, the force that body exerts is referred to as the "action," and the force that the other body exerts in a similar but opposite direction is referred to as the "reaction."
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If your engine is flooded with gasoline, you should push the ____ to the floor and hold for _____. brake, 5 seconds brake, 1 minute accelerator, 1 minute accelerator, 5 seconds submit answer
You should depress the accelerator if the gasoline in your engine is flooded to the ground and maintain for five seconds.
An internal combustion engine, in particular, is a form of heat engine that is fueled by gasoline. The most popular means of propulsion for motorized vehicles are these engines. While gasoline can be used to power turbines, the term "gasoline engine" only applies to piston-driven gasoline engines.
Is a gasoline engine a diesel engine?
Diesel engines primarily use compression, whereas gasoline engines mostly use spark-fired combustion.The word "gasoline" is an American term for motor vehicle fuel. The trademark "Cazeline" or "Gazeline," which bears the last name of British publisher, coffee trader, and social activist John Cassell, is claimed to have had some impact on the phrase.Petroleum-derived combination of flammable, volatile liquid hydrocarbons used as fuel for internal combustion engines; often spelled gasolene, gas, or petrol. Additionally, it serves as a fat and oil solvent.To learn more about Gasoline engine, visit:
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Stare at a piece of bright colored paper for 45 seconds or so. then look at a plain white surface. what do you see?
Your blue receptors will become fatigued if you stare at a blue image for too long, and the afterimage will be the opposite colour: orange.
Why do we first perceive blue and then yellow?A yellowing of the optical medium of the eye causes Xanthopsia, a colour vision impairment in which blue dominates in perception. Digoxin's inhibition of the sodium pump as well as cataract formation, which can have the effect of a yellow filter, are the most frequent causes.
A blue-green, or cyan, afterimage of the same size and form can be seen if you stare at a red item and then look at a white region shortly after.
Digibind or Digifab, also known as digoxin-specific antibody antigen-binding fragments (DSFab), are a potent antidote that binds digoxin directly.
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Ordered: vistaril 75 mg im now. used with permission from pfizer, inc how many ml will you give for each dose?
Option c) 1.5 ml of volume will be given for each dose.
How does Vistaril work and what does it do?The prescription drug Vistaril is used as preoperative sedation, to treat anxiety symptoms, and to cure skin hives or itching. Vistaril may be taken either on its own or along with other drugs.
The class of medications that includes Vistaril includes antiemetic agents, first-generation antihistamines, and piperazine derivative antihistamines.
What Vistaril side effects might there be?Serious adverse reactions to Vistaril include:
Heartbeats that are rapid or hammering, headaches accompanied by chest pain, extreme dizziness, fainting, and convulsions (seizures)
Immediately seek medical attention if you experience any of the above symptoms.
The most typical Vistaril side effects include:
Fatigue, headache, dry mouth, and rash on the skin
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A car initially traveling at 15 m/s North accelerates to 25 m/s North in 4 seconds. The magnitude of the average acceleration is?
The average acceleration of the car as it accelerates from 15 m/s to 25 m/s will be 2.5 m/s².
What is Average acceleration?Average acceleration is the average rate of change of velocity with respect to time. Mathematically -
a = Δv/Δt
Given that a car is traveling at 15 m/s in north direction and in 4 seconds it accelerates to 25 m/s in the north direction only. Therefore, we can write -
initial velocity [u] = 15 m/s
final velocity [v] = 25 m/s
time taken [Δt] = 4 s
The magnitude of the average acceleration can be calculated as follows-
a = Δv/Δt
Δv = v - u = 25 - 15
Δv = 10 m/s
Therefore -
a = 10/4
a = 2.5 m/s².
Therefore, the average acceleration of the car will be 2.5 m/s².
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A bottle has a mass of 35.00 g when empty and 98.44 g when filled with water. When filled with another fluid the mass is 88.78g. What is the specific gravity of this other fluid
Answer:
mass of water = 98.44 - 35.00 = 63.44g
water has a density of 1000g/L
Volume of bottle = 63.44/1000 = .06344L
mass of other liquid = 88.78-35 = 53.78g
density of other liquid = 53.78g/0.06344L = 847.73g/L
Since water has a specific gravity of 1, set up a relation 1000/847.73 =1/sg
sg=.85
A vertical spring stretches 3.9 cm when a 10.-g object is hung from it. The object is replaced with a block of mass 25 g that oscillates up and down in simple harmonic motion. Calculate the period of motion.
What potential difference must be applied to an x-ray tube to produce x-rays with a minimum wavelength of 45.0 pm?
The potential difference of 2.7 x [tex]10^{4}[/tex] volts is needed.
We have an X - Ray tube to produce X - Rays.
We have to determine what potential difference to produce X-rays with a minimum wavelength of 45.0 pm ?
What is an X - Ray ?An X - Ray is an electromagnetic wave of high energy and very short wavelength, which is able to pass through many materials opaque to light.
According to the question, we have -
λ = 45 pm = 4.5 x [tex]10^{-11}[/tex] meter
h = 6.63 × [tex]10^{-34}[/tex]Js
c = 3 x [tex]10^{8}[/tex] m/s
We know -
E = hv
where v is frequency.
E = [tex]$\frac{hc}{\lambda}[/tex]
When accelerated through a potential difference of say V volts, then -
E = E(k) = eV
Therefore -
eV = [tex]$\frac{hc}{\lambda}[/tex]
V = [tex]$\frac{hc}{e\lambda }= \frac{6.63\times 10^{-34} \times 3\times 10^{8} }{1.6\times 10^{-19} \times 4.5 \times 10^{-11} }[/tex] = 2.7 x [tex]10^{4}[/tex] volts
Hence, the potential difference of 2.7 x [tex]10^{4}[/tex] volts is needed.
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Neurons have a net negative charge at rest. This means that when they are active, they must have a positive charge. True or false?.
The statement is True.
Neurons have a net negative charge when it is at rest. This means that when they are well active, they must have a positive charge.
At rest, neurons have a net negative charge; the inside of neurons is approximately 70 millivolts more negative than the outside. When neurons are active, they must be positively charged in order to generate an action potential.
Neurons have a strong negative charge within them, as opposed to a positive charge outside. This is due to the presence of other molecules known as anions. They are negatively charged but far too large to escape through any available channel. They remain in place and give the cell a negative charge on the inside.
Because of an unequal distribution of positive ions across the membrane, the resting potential is negative; 3 Na+ is pumped out of the cell for every 2 K+ that enters, so the inside of the cell is less negative (less positive) than its surroundings.
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The closest position taken by the earth relative to the sun is ________ million kilometers.
Answer:
Earth's distance from the sun changes
In early January, Earth reaches its closest position to the star. Astronomers call this point perihelion, and at this time Earth is about 91.4 million miles (147.1 million km) away from the sun, according to NASA (opens in new tab).
For customer arrivals, the random number interval assigned to the time between arrivals of 2 minutes is:_________
For customer arrivals, the random number interval assigned to the time between arrivals of 2 minutes is 0.0500-0.19999.
What do you mean by time?Time is the continued sequence of the existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future. It is a component quantity of the various measurements used to sequence events, to compare the duration of events or the intervals between them, and to quantify rates of change of quantities in material reality or in the conscious experience. Time is often referred to as a fourth dimension, along with the three spatial dimensions.
Time has long been an important subject of the study in religion, philosophy, and science, but defining it in a manner applicable to all fields without circularity has consistently eluded scholars. Nevertheless, diverse fields such as the business, industry, sports, the sciences, and the performing arts all incorporate some notion of time into their respective measuring systems.
Time in physics is operationally defined as the "what a clock reads".
The physical nature of the time is addressed by general relativity with respect to events in spacetime. Examples of events are collision of two particles, the explosion of a supernova, or the arrival of a rocket ship. Every event can be assigned the four numbers representing its time and position (the event's coordinates).
However, the numerical values are different for the different observers. In general relativity, question of what time it is now only has meaning relative to a particular observer. Distance and the time are intimately related, and the time required for light to travel a specific distance is the same for all observers, as first publicly demonstrated by Michelson and Morley. General relativity does not address nature of time for extremely small intervals where quantum mechanics holds. At this time, there is no generally accepted theory of the quantum general relativity.
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Life has been found on earth in a lake deep under the antarctic ice pack. this resembles what other environment in the solar system that has been cons?
Life has been found on Earth in a lake deep under the Antarctic ice pack. This resembles europa environment in the solar system which has been considered a possible location for life.
Briefing :The fourth-largest satellite of Jupiter, Europa is the solar system's sixth-largest moon. It is the smoothest solid object in the solar system despite its broken and discolored appearance; its highest peaks, which are small and only reach a few hundred meters in height, and huge craters are uncommon. Because of its smoothness, the moon's surface is likely only tens of millions of years old, as opposed to other objects' surfaces that are billions of years old. Unlike on many other worlds, the ice here is somehow resurfacing and smoothing out more quickly.Instead of the massive canyons found on some other worlds, the streaks and splotches that run across the terrain are most likely caused by relatively shallow fissures and differing ground compositions.Learn more about the europa with the help of the given link:
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A donkey starts from rest and accelerates for 6.7 s at a rate of 1.6 m/s².
What is the maximum speed the donkey achieves? Round your answer
to 2 decimal places.
The maximum speed of the donkey is 10.72m/s
The question is based on the principle of motion in one dimension and hence formulas of motion in one dimension can be applied.
It is given that donkey attains an acceleration of 1.6 m/s^2
The time taken to accelerate to given speed is 6.7 seconds
We use the formula v=u + at to find the fastest speed
v is the final or maximum speed
u is the initial speed which in this case is 0 as the donkey is at rest
a is the acceleration of the donkey
t is the time taken in seconds
v = u + at
v= 0 + 1.6 x 6.7
= 10.72 m/s
Hence the donkey obtains the speed of 10.72 m/s
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If narrow sense heritability for flowering time is 0.6 what will the average time to flowering be in the next generation?
Narrow sense heritability = ratio of additive genetic variance to the total phenotype variance
It is used more in practical because it is easily calculated and gives good estimate of broad sense heritability
heritability is
[tex]h^{2} = }\frac{v_{a} }{v_{p} }[/tex]
[tex]v_{a}[/tex] = variance in genotype
[tex]v_{b}[/tex]= variance in phenotype
Genotype variance : It is one of genetic parameter that determine effectiveness of selection process in plant breeding.
Phenotype variance: It determines whether that trait has the ability to respond to natural or artificial selection.
Heritability estimates range in value from 0 to 1. If H = 0 there is no genetic variation in which all variation in the population comes from differences in the environment experienced by individual.
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If the wavelength of the photon of light absorbed by a hydrogen atom has a value of 1.0952 x 10-6 m, and the electron starts at level n = 3, what is the level (n) of the final state of the electron?
The level (n) of the final state of the electron n₂ = 6
What does a photon mean in science?a photon, also known as a light quantum, is a very small energy package of electromagnetic radiation. When explaining the photoelectric effect in 1905, Albert Einstein proposed the potential of energy levels packets during the transmission of light.
What is an electron?A negatively charged subatomic component called an electron can be either attached to or detached from an atom (not bound). Protons, neutrons, and electron that is bonded to the atom make up the three basic types of particles that make up an atom. Protons, neutrons, and electrons make up the nucleus of an atom.
According to the given information:An atom of hydrogen has a value of 1.0952 x 10-6 m
starting at level 1, the electron n = 3
what is the electron's final state level (n).
[tex]\frac{1}{\lambda}=\bar{v}=R_H\left(\frac{1}{n_1^2}-\frac{1}{n_2^2}\right)[/tex]
λ = 1.0952 x 10⁻⁶m
= 1.0952 x 10⁻⁴cm
R[tex]_H[/tex] = 109677cm⁻¹
n₁ = 3
n₂ = ?
Putting the value in the formula:
we get,
1/1.0952 x 10⁻⁴ = 109677cm⁻¹[tex]\left(\frac{1}{3^2}-\frac{1}{n_2^2}\right)[/tex]
0.0833 = 1/9 - 1/(n₂)²
(n₂)² = 1/0.0278
n₂ = 6
The level (n) of the final state of the electron n₂ = 6
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A plane accelerates from rest at a constant rate of 5. 00 m/s2m/s2 along a runway that is 1800 mm long. Assume that the plane reaches the required takeoff velocity at the end of the runway. What is the time ttotto needed to take off?.
The time needed to take off is 0.8s
What is Acceleration ?Acceleration can be defined as the rate of change of velocity. It is a vector quantity.
Given that a plane accelerates from rest at a constant rate of 5.0 m/s² along a runway that is 1800 mm long. Assume that the plane reaches the required takeoff velocity at the end of the runway.
The takeoff velocity V will be
V² = U² + 2aS
Where
U = 0 since it accelerated from resta = 5 m/s²S = 1800 mm = 1.8 mV = ?Substitute all the parameters into the formula above
V² = 0 + 2 × 5 × 1.8
V² = 18
V = √18
V = 4.24 m/s
The time t needed to take off will be
V = U + at
4.24 = 0 + 5t
5t = 4.24
t = 4.24 / 5
t = 0.8 s
Therefore, the time needed to take off is 0.8s
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An ideal step-up transformer doubles a primary voltage of 110 v. what is the ratio of the number of turns in its primary coil to the number of turns in the secondary coil?
Ratio of the no. of turns in primary coil to the no. of turns in the secondary coil is 1:2
Transformer -
A device used in the power transmission of electric power.
It is commonly used to increase or decrease the supply voltage without changing the frequency of AC b/w circuit.
In simple word transformer is a thing that steps up or steps down voltage.
In step up transformer-
The output voltage is increased.
The secondary output voltage is higher that primary voltage.
In step down transformer-
The output voltage is decreased.
These are used to convert the high voltage primary supply to low voltage secondary output.
In step up transformer
N₁/N₂= V2/V₁= I₁/I₂ (equation 1.)
A ideal step up transformer double the primary voltage
Then Vs = 2 Vp
Using in equation 1. We get
Vp/Vs = N1/N2
Vp/2Vp = N1/N2
N1/N2 = 1/2
N1 : N2 = 1:2
Ratio of the no. of turns in primary coil to the no. of turns in the secondary coil is 1:2
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Speed limit signs on expressway exit ramps are generally colored __________ .
Answer:
White with black lettering
Explanation:
Generally they are yellow with black lettering but that's for highways at least the state I live in.
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There are 200cells of emf 2v and internal resistance 1ohm. There are m rows having n cells in each row. If the combination have a net emf of 50v. Then find m,n and internal resistance ?
Answer:
See below
Explanation:
Each parallel row = 50 v so there is 25 cells in each (2 v each)
200 cells / 25 cells / row = 8 rows of 25 cells each
the equivalent resistance is
each row has resistance = 25 ohms
equivalent resistance =
1 / ( 8 * 1/25) = 3.125 ohms
Complete the statement detailing the relative change in [h ][h ] when the phph of a solution changes from 6.406.40 to 8.40.
When a solution's pH increases from 6.40 to 8.40. is 100 times smaller.
What is the solution described?In chemistry, a solution is a homogeneous mixture of two or more compounds in their relative proportions, which can be constantly changed up to what is known as the limit of solubility. Although solutions of gases and solids are possible, the term "solution" is most frequently used to refer to the liquid condition of matter.
What three types of solutions are there?Solutions that are isotonic, hypotonic, and hypertonic (tonicity).
What is the significance of the solution?Any of the phases of matter can dissolve in another phase in a solution, which is a homogenous mixture of molecules. Solution chemistry is crucial because the majority of chemical reactions, whether they occur in a lab or in nature, take place in solutions, whether they involve solids, liquids, or gases.
According to given statement:pH = -log [H+]
6.4 = -log [H+]
[H+] = 3.981*10^-7 M
pH = -log [H+]
8.4 = -log [H+]
[H+] = 3.981*10^-9 M
We can see that [H+] at 8.40 is lower by 100 times as compared to [H+] at pH = 6.40.
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The mass of the mars exploration rover is 1,063 kg. the gravity on mars is about 0.38 that of earth.1)where would the normal force exerted on the rover when it rests on the surface of the planet be greater?
The normal force exerted on the rover when it rests on the surface of the planet be greater is 3,125.22 N.
What is normal force?
A normal force is defined as the force that a surface exerts on an object.
N = W
N = mg
where;
m is mass of the objectg is acceleration due to gravityNormal force is proportional to the weight of an object be considered.
Normal force of the roverN = mg
N = 1,063 kg x 0.3(9.8 m/s²)
N = 3,125.22 N
Thus, the normal force exerted on the rover when it rests on the surface of the planet be greater is 3,125.22 N.
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An object is launched from the base of an incline, which is at an angle of 30° If the launch angle is 60° from the horizontal and launch speed is 10m/s. What is the total flight time ?
Answer:
4.6 s, because that is the time for the object to reach the top of the incline.
Explanation:
that at the top of the incline, the horizontal velocity will be equal to the launch velocity, because there is no longer any force acting on the object in the horizontal direction. The only force acting on the object is gravity, which is acting in the vertical direction. So the only velocity that will be changing is the vertical velocity. The vertical velocity will be changing because of the force of gravity, which is 9.8 m/s2. The equation for the vertical velocity is: vf = vi + a*t, where vf is the final velocity, vi is the initial velocity, a is the acceleration and t is the time. The final velocity in this case is 0 m/s, because the object has reached the top of the incline and is no longer moving in the vertical direction. The initial velocity is 10 m/s, because that is the launch velocity. The acceleration is 9.8 m/s2, because that is the force of gravity. So when you plug all of those values into the equation, you get: 0 = 10 + 9.8*t and you solve for t and you get t = 4.6 s.
A father and his young daughter are ice skating. they face each other at rest and push each other, moving in opposite directions. which one has the greater final speed?
Answer:
daughter has the greater speed
Explanation:
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During the resting phase, what is the electric potential energy of a typical na ion outside of the cell?
During the resting phase, −80 mV is the electric potential energy of a typical Na ion outside of the cell
What do you understand by electric potential energy ?The power required to move a charge in opposition to an electric field is known as electric potential energy. A charge must be moved through a stronger electric field with more energy, but it also must be moved through a weaker electric field with more energy.
You cannot see the charge that is waiting to pass through the wires when a light switch is off. That is but one illustration of electric potential energy. Other instances include: a switched-off incandescent light bulb.
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