007 (part 1 of 2) 10.0 points
While John is traveling along a straight inter-
state highway, he notices that the mile marker
reads 246 km. John travels until he reaches
the 147 km marker and then retraces his path
to the 172 km marker.
What is John's resultant displacement from
the 246 km marker?
Answer in units of km.
Answers
Answer:
74 km
Explanation:
Ler the position of markers be A,B, and C for notation 246 km, 172 km, and 147 km respectively. John's whole journey has been shown in the figure.
As given,his initial position was the point A. At first, he travelled from the point A to C, then he traveled back from the point C to B on the straight path. His final position is at the point B.
The resultant displacement equals to the shortest distance between the final and the initial positions.
So, the magnitude of the resultant displacement is |172-246| km=74 km and the direction is towards point B from point A.
Related Questions
A ball is thrown vertically upward. After t seconds, its height h (in feet ) is given by the function h(t)=40t-16t^(2). What is the maximum height that the ball will reach?
Answers
The maximum height that the ball will reach is 25 feet. when the ball will reach its maximum height after 1.25 seconds.
The maximum height that the ball will reach can be determined by finding the vertex of the parabola represented by the function
h(t) = 40t - 16t²
The x-coordinate of the vertex can be found using the formula
x = - b / (2a)
where:
a = coefficient of the t² term
b = coefficient of the t term.
Given
a = -16
b = 40
x = -40/(2×(-16))
= 1.25
This means that the ball will reach its maximum height after 1.25 seconds. We need to substitute this value of t into the function to determine the maximum height:
h(1.25) = 40 (1.25) - 16 (1.25)²
= 50 - 25
= 25.
Therefore, the maximum height that the ball will reach is 25 feet.
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According to current models of solar system formation, why did uranus and neptune end up to be much less massive than jupiter and saturn?.
Answers
Particles withinside the sun nebula have been extra unfold out at more distances, in order that accretion took longer and there has been much less time to tug in fueloline earlier than the sun wind cleared the nebula.
According to present day fashions of sun gadget formation, Uranus and Neptune turn out to be being lots much less huge than Jupiter and Saturn due to the fact the debris have been unfold out over huge distances. Accumulation of those took a long term and consequently Uranus and Neptune have been much less huge than Jupiter and Saturn. According to the sun gadget theory, the formation of the sun gadget took place approximately 4.6 billion years ago. The version of sun gadget formation is likewise recognized as 'the nebular hypothesis'.
According to scientists, nearly 4.6 billion years ago, the sun nebula turned into a massive huge cloud of gases and dust. However, billions of years back, this massive cloud began out to disintegrate and the gases started out to reduce because of gravitational pull. Most of the mass turned into composed withinside the center, out of which the solar turned into shaped whilst the relaxation of the mass rearranged forming a protoplanetary disk that brought about the formation of planets, asteroids, moons, and different small bodies.
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Joe throws a 4 kg stone straight up and it reaches a height of 5 m. What is is GPE at is highest point?
Answers
Joe launches a 4 kg boulder upward and, and it soars 5 m in the air. At its tallest point, what is the stone's GPE? 2 m. How high must you lift a 5.
Describe GPE?Result for an image Describe the GPE.
The mass and position of an object affect its gravitational potential energy (GPE). It is equivalent to the effort required to move an object against the pull of gravity. GPE equals (mass) x g x (height) An item loses its gravity potential energy when it falls.
How come GPE?Result for an image Describe the GPE.
The energy that an object has due to its location in a gravitational field is known as gravitational potential energy. For an object close to the surface of Earth, gravitational force is most frequently used to.
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Joe launches a 4 kg boulder upward and, and it soars 5 m in the air. At its tallest point, what is the stone's GPE? 2 m. How high must you lift a 5.
Describe GPE?The mass and position of an object affect its gravitational potential energy (GPE). It is equivalent to the effort required to move an object against the pull of gravity. GPE equals (mass) x g x (height) An item loses its gravity potential energy when it falls.
How come GPE?The energy that an object has due to its location in a gravitational field is known as gravitational potential energy. For an object close to the surface of Earth, gravitational force is most frequently used to.
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A series circuit consists of a 0.55 h inductor with internal resistance of 8.0 ω connected in series with a 4.0 ω resistor, an open switch, and an ideal 12 v batterya. When the switch is closed, what is the initial current through the 4.0-ohm resistor? b. What is the current through the 4.0-ohm resistor a very long time after the switch is closed?
Answers
Part a) When the switch is closed, the initial current through the 4.0-ohm resistor is 0 A.
Part b) The current through the 4.0-ohm resistor a very long time after the switch is closed is 1 A.
What is the best way to define a series circuit?A series circuit has each load in a separate row. The flow of electricity has only ONE path. If this circuit were a row of light bulbs, the others would all go out if one of the bulbs blew.
What drawbacks come with using a series circuit?The first drawback of a series circuit is that if one component fails, the entire circuit will fail because the circuit is broken. The second drawback is that the resistance of a series circuit increases with the number of components in the circuit.
Part a)
We know that the inductor in a series circuit resists the abrupt change in current according to Lenz's law.
Additionally, if the flux in the circuit changes, it will create a reverse EMF to create the opposite current in the circuit.
When the switch is shut off at time t = 0,
then initially it will generate the opposing EMF so that the circuit's net EMF is zero.
therefore, the current is zero.
Part b).
The induced EMF in the circuit will eventually reach zero because the flow will stay constant,
Therefore, we may state
\(EMF= i(R_1+R_2)\)
\(12= i(8+4)\)
\(i= \frac{12}{12}\)
\(i=1A\)
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Hypertension The INTERSALT Study investigators collected standardized data on timed 24-hour urinary excretion for 10,079 men and women from 52 population samples in 32 countries (Brown et al.) [14] One of the goals of the INTERSALTStudy was to quantify the relationship between 24-hour urinary Na ly) and estimated 24-hour urinary Na (x) obtained from casual urine specimens at one point in time. The investigators presented a simple linear regression of y on x, separately for men and women. The regression equation for men was: Y 1.03 x 7.19, with R2 0.27, n 1369 11.25 What does the R2 of 0.27 mean in words?
Answers
In words, the R2 of 0.27 means that 27% of the variability in y (24-hour urinary Na) can be explained by x (estimated 24-hour urinary Na) obtained from casual urine specimens at one point in time.
The INTERSALT Study was designed to investigate the relationship between dietary sodium and blood pressure (hypertension) in populations worldwide.
The study included 10,079 men and women from 52 population samples in 32 countries. One of the goals of the study was to quantify the relationship between 24-hour urinary Na (y) and estimated 24-hour urinary Na (x) obtained from casual urine specimens at one point in time.
The investigators presented a simple linear regression of y on x, separately for men and women. The regression equation for men was: Y = 1.03x + 7.19, with R2 = 0.27, n = 1369.
The coefficient of determination, R2, is a statistical measure that represents the proportion of the variance for a dependent variable (y) that's explained by an independent variable (x) or variables in a regression model.
In this case, the R2 of 0.27 means that 27% of the variability in y (24-hour urinary Na) can be explained by x (estimated 24-hour urinary Na) obtained from casual urine specimens at one point in time. The remaining 73% of the variability in y is due to other factors that are not included in the regression model.
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What is a Sport car transformation
Answers
Answer:
when a car transforms...
Explanation:
Explanation:
Vivimos en un puente en lo que el diseño de coches se refiere, consecuencia de la gran disrupción de la automación que ocurriría en los próximos años.
if the earth stops rotating about its axis then what will be the change in the value of g at a place in the equator-plane? Assume that earth is a sphere with a radius of 6.4*10*6m.
Answers
Answer:
if the earth stops rotating the value of g increases
what is refraction and reflection
Answers
Answer:
Reflection is simply the property of a light that rebounds or bounces back after hitting a surface.
Refraction is when the light, which passes through a surface, undergoes some changes in appearance whenever it usually passes through a medium.
some answer now hurry
Answers
Answer:
Hee answer is B
Explanation:
____________.
A tennis ball is released at rest from the top of the school. It hits the ground after falling for 2.00 s. What was the height from which the ball was dropped?
a 15.4 m
b 9.8 m
c 19.6 m
d 20.7 m
Answers
Answer:
\(\huge\boxed{\sf h = 19.6\ m}\)
Explanation:
Given:
Time = t = 2.00 secs
Acceleration due to gravity = g = 9.8 m/s²
Initial Velocity = \(\sf V_{i}\) = 0 m/s
Required:
Height = h = ?
Formula:
\(\sf h = V_{i} t + \frac{1}{2} gt^2\)
Solution:
Putting the given in the above formula
h = (0)(2) + 1/2 (9.8)(2)²
h = 1/2 (9.8)(4)
h = (9.8)(2)
h = 19.6 m
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Which of the following is TRUE about paleoclimates? *
O They can be warm or cold.
O They can last for a few centuries.
They can last for tens of thousands of years.
All of the above.
Answers
all of the above. a paleoclimate is a climate that has existed at some point in the past.
14) A heater is rated at 495W and connected to a 110V supply calculate the
current following through the element? *
Answers
I = 4.5 A
Explanation:
P = VI ---> I = P/V
I = (495 W)/(110 V)
= 4.5 A
When you see the bright flash of a meteor, what are you actually seeing?.
Answers
The actual things we are seeing if we see the bright flash of a meteor are a pea-sized particle and the surrounding air as the particle burns up in our atmosphere.
What are meteors?
A meteor is a space rock that enters the atmosphere of the earth and produces a streak of light in the sky. Sometimes, people refer to them as shooting stars. When meteoroids enter the earth's atmosphere, they become meteors.
The night sky can be illuminated by meteors, also known as shooting stars, which are bits of space dust and debris that burn up in the Earth's atmosphere.
A pea-sized particle burns up in our atmosphere, and the surrounding air In other words, you do not see the particle itself, but only the effects it has on the surrounding air as it burns up.
Thus, we are seeing burned particles or dust when we see meteors.
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A group of stars that form a pattern are called a constellation. This pattern of stars
A happens accidentally and is only visible once per year
B stays together and seems to move as a unit. C stays together for a short time because stars are moving. D has been and will always be this way
Answers
A group of stars that form a pattern are called a constellation. This pattern of stars (B) stays together and seems to move as a unit is the correct option, because Asterism is the name for a collection of stars that form a pattern.
It is also known as a constellation, and astronomers use the phrase to describe a region of the sky. An area of the celestial sphere known as a constellation is one in which a collection of discernible stars appears to create a pattern or outline, generally resembling an animal, mythological figure, or inanimate object.
The first constellations probably have their origins in prehistoric times. They were used by people to share tales about their beliefs, encounters, creations, or mythology. Before the current constellations were acknowledged worldwide, various cultures and nations adopted their own constellations, some of which persisted into the first decade of the 20th century. Over time, there have been substantial changes in how constellations are recognised. Many had size or shape changes. Some gained popularity,
Therefore, the correct option is (B).
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A capacitor is connected to a battery. The force of attraction between the plates when the separation between them is halved:
A . remains the same
B . becomes eight times
C . becomes four times
D . becomes two times
Answers
A capacitor is connected to a battery. When the separation between the plates of the capacitor is halved, the force of attraction between then will become four times.
We know that the parallel plate capacitor's capacitance is determined by
C = ∈₀\(\frac{A}{d}\)
and that the distance between the two plates is denoted by d. So, when the distance between objects is cut in half, the capacitance doubles. We can express that mathematically as,
C' = ∈₀\(\frac{A}{\frac{d}{2} }\)
or, C' = 2∈₀ \(\frac{A}{d}\)
or, C' = C
Here, the potential remains constant.
Now, charge is equal to the product of capacitance and potential, i.e.,
Q = C × V
The charge will double as the capacitance does, and vice versa.
The following equation describes the connection between the d and the potential difference between the two plates:
E = \(\frac{V}{d}\)
The value of the electric field doubles because the separation has decreased by half.
From Coulomb's law, we have
Force of attraction, F = QE
Now that charge and the electric field have both increased by two, the force of attraction will be
F' = Q'E'
or, F' = 2Q × 2E
or, F' = 4QE
or, F' = 4F
Hence, the force of attraction will become four times.
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What is the meaning of “Eg” in physical science
Answers
Answer:
e.g. means "for example" but is physics is also stands for gravitational potential energy
4. Which of the following statements about the state of matter is correct? A. Molecules in a solid are disorderly arranged B. Solids are highly compressible C. Liquids have definite form and volume D. Molecules in a gas move faster than those in a liquid.
Answers
Answer:
B. Solids are highly compressible
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
Answers
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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1) Find out the equivalent resistance.
2) find out all the current's in every resistors.
3) find out the voltage in resistor 1 and 4.
Answers
Answer:
1) 2.388ohms
2) R1 3.36A
R2 1.682A
R3 2.88A
R4 2.16A The current has 5.048A over all
3) Voltage in R1 is 3.36v
Voltage in R4 is 8.63v
Explanation:
1. Each of the resistance R1 and R2 are in parallel in series combination with R3 and R4 so we calculate
R1 and R2 which is 1×2÷(1+2)= 0.6667ohms
R3 and R4 which is 3×4÷( 3+4)= 1.71ohms
so the equivalent resistance is 0.667+ 1.71= *2.377ohms*
2. The overall current = voltage source ÷ total resistance
= 12÷ 2.377= 5.048Amps
so current in every resistor will be
current in 1ohms will be (2÷3)×5.048= 3.36Amps
current in 2ohms will be (1÷3)×5.048= 1.68Amps
current in 3ohms will be (4÷7)×5.048= 2.88amps
current in 4ohms will be (3÷7)× 5.048= 2.16amps
3. voltage in R1 is 0.667ohms × 5.048amps= 3.36v
voltage in R4 is 1.71ohms × 5.048amps= 8.63v
write a reason why you want to be a physiologist for criminals
Answers
Psychology is important in crimes as it helps in understanding the behavior and thinking of criminals which help in reducing crime in the society.
What is Forensic psychology?Forensic psychology is the development and application of the scientific knowledge and the methods which help to answer the legal questions which generally arising in the criminal, civil, contractual, or other judicial proceedings.
One of the many disciplines which has been made and continues to make contributions to the criminology and the criminal justice is all about psychology. Psychology focuses on the behavior of the individual offenders and the forces which motivate individuals to engage in the criminal or violent behavior of people.
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Why is nuclear energy able to be used for practical purposes? the reactions are controlled to regulate energy output. the reactions are uncontrolled for maximum energy output. all of the products are fed back into the reaction to keep it going. all of the products are immediately removed to inhibit more reactions.
Answers
Nuclear energy is is used practically for many energy requirements because the reactions are controlled to regulate energy output
What is nuclear energy?Nuclear energy is the energy reaelesed during nuclear relations.
Nuclear energy is a clean form of energy which is available in enormous amounts.
Nuclear energy is is used practically for many energy requirements because the reactions are controlled to regulate energy output.
Therefore, the control of nuclear reactions make the use if nuclear energy possible.
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Answer: A or the reactions are controlled to regulate energy output.
Explanation: did it on edge!
(True/False) The normal force is always opposite in direction to weight.
Answers
Answer:
True
Explanation:
Which factor is the main reason the first spaceships were so large?
a. to improve magnetic levitation
b. to increase the thrust to reach escape velocity
c. to carry more astronauts
d. to carry large amounts of fuel
Answers
Answer:
d
Explanation:
Describe where x-rays are found on the ems compared to the other six forms of radiation. In your description, compare and contrast its wavelength, frequency and energy with those of other regions of the ems.
Answers
X-rays are electromagnetic radiation with a high frequency and energy. They have frequencies between 3 and 1016 Hz and wavelengths between 0.01 to 10 nanometers. They are discovered to exist in the electromagnetic spectrum's region between ultraviolet and gamma rays.
What distinguishes X-rays from other electromagnetic waves?
X-rays are a part of the electromagnetic spectrum. Light waves get more energetic as their wavelengths shorten. X-rays are more energetic because they have shorter wavelengths. When discussing X-rays, we frequently refer to their energy rather than its wavelength.
What kind of wavelength description would be appropriate for X-rays?Compared to ultraviolet light, x-rays have far higher energies and shorter wavelengths; therefore, scientists normally talk about x-rays in terms.
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Tiana jogs 1.5 km along a straight path and then turns and jogs 2.4 km in the opposite direction. She then turns back and jogs 0.7 km in the original direction. Let Tiana's original direction be the positive direction. What are the displacement and distance she jogged?
Answers
Answer:
Distance: 4.6km Displacement= -0.2km
Explanation:
Total distance: 1.5+2.4+0.7= 4.6 km
Displacement: 1.5-2.4+0.7= -0.2km
The displacement may also be 0.2km, it just depends on if it wants it negative or not.
Tiana displacement is 0.2 km in the opposite direction, while her distance covered is 4.6 km
Given that Tiana's original direction be the positive direction.
Displacement is a vector quantity. That is, we will consider both the magnitude and direction.
As Tiana jogs 1.5 km along a straight path and then turns and jogs 2.4 km in the opposite direction, Her displacement = 1.5 - 2.4
As She then turns back and jogs 0.7 km in the original direction,
Displacement = 1.5 - 2.4 + 0.7
Displacement = - 0.2 km ( that is, in the opposite direction.)
Distance is a scalar quantity. That is, we will only consider the magnitude.
Tiana total distance = 1.5 + 2.4 + 0.7
Total distance = 4.6 km
Therefore, her displacement is 0.2 km in the opposite direction, while her distance covered is 4.6 km
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A block of mass 1kg is placed on an inclined plane at an angle of 30° to the horizontal. Calculate the frictional force, normal reaction, the coefficient of the static friction
Answers
Question:
A block of mass 1kg is placed on an inclined plane at an angle of 30° to the horizontal. Calculate the frictional force, normal reaction, the coefficient of the static friction
Answer:
Break the mg force into components in the plane of the inclined plank. Now force acting parallel is mgsin37°. Perpendicular force is mgcos37° which is equal to normal force.
Now calculate max value of friction force which is 0.8*mg cos37°. Since its greater than pulling force mgsin37°, the body will be at rest and acceleration is zero.
Force applied by surface is vector sum of normal force and friction force acting.
PLEASE HELP GR 9 SCIENCE
3. Briefly describe why the celestial sphere is nothing more than a good MODEL of constellations?
Answers
The region directly above the North Pole of Earth is known as the north celestial pole.The area just above the South Pole of Earth is known as the south celestial pole.The celestial sphere is completely encircled by the celestial equator, that is a projection of the Earth's equator into space.
How do constellations connect to the celestial sphere?Constellations, from the Latin meaning "collection of stars," are made up of imagined shapes that are drawn upon the celestial sphere.These constellations classify the stars into more recognizable categories.
What exactly is the celestial sphere, and why does astronomy care about it?celestial sphere, the surface of the skies that appears to be fixed with the stars.It can be regarded as a real sphere at an indefinite distance from Earth for the purposes of creating coordinates to mark actual positions of heavenly bodies.
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The north celestial pole is the area directly above the Earth's North Pole. The South Celestial Pole is the region directly above Earth's South Pole. The celestial equator, which is a projection of the Earth's equator into space, completely surrounds the celestial sphere.
How are constellations related to the sphere of the stars?Constellations are made up of imagined shapes that are drawn onto the celestial sphere. The word constellation comes from the Latin for "collection of stars." The stars are divided into more recognizable categories by these constellations. The area of the skies that seems to be fixed with stars is known as the celestial sphere.
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Which unit of electricity expresses the volume of electron movement in a circuit?
Answers
Answer:
Ampere
Explanation:
This is the current unit of the circuit ....
how to find a transfer function of a inductor in parallel with a current source and a capacitor in series with a resistor
Answers
To determine the transfer function of an inductor in parallel with a current source and a capacitor in series with a resistor, write the circuit equation, find the Laplace transform of the equation, rearrange the equation to solve for I(s), and determine the transfer function H(s) by dividing I(s) by V(s).
To find the transfer function of an inductor in parallel with a current source and a capacitor in series with a resistor, follow the following steps:Step 1: Write the circuit equation. Using Kirchoff's voltage law, KVL, the circuit equation is given as: Vi = iR + (1/C) ∫i dt + L di/dtStep 2: Determine the Laplace transform of the circuit equation. V(s) = IR(s) + (1/SC)sI(s) + LsI(s) - Li(0)Step 3: Rearrange the equation to solve for I(s). I(s) = [V(s) - Li(0)] / [R(s) + (1/SC)s + Ls]Step 4: Determine the transfer function H(s). H(s) = I(s) / V(s) = 1 / [R(s) + (1/SC)s + Ls]For more questions on transfer function
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Part A
Which yoga poses did you perform best? Which poses do you still need to improve on?
Answers
Answer:
Knees to Chest
Be consistent. Setting and committing to a regular practice of yoga is absolutely essential if you want to make improvements. ..
Answer: Dog pose was really easy, but tree pose was really difficult because it was hard to balance.