A 1000 kg motor vehicle starts from an initial velocity 1 m/s and after traveling at a distance of 113 m on a straight-line path, its speed is found to be 28 m/s. What is the magnitude of the average net acceleration of the car during the travel on this straight-line path? No need to write the unit. Please write the answer in one decimal place. (eg 1.234 should be written as 1.2).
Answers
Answer:
The acceleration is 3.5.
Explanation:
According to the question, the initial velocity is given as 1 m/s, the distance travelled is given as 113 m and the final velocity is given as 28 m/s.
Observe equation 1, \(v^{2} = u^{2} +2a s\) where v is the final velocity, u is the initial velocity, a is the acceleration and s is the distance. Rearranging for acceleration gives
\(a = \frac{v^{2} -u^{2} }{2s}\)
Thus, \(a = \frac{28^{2}-1^{2} }{226}\)
Therefore, acceleration is 3.4646 which is 3.5 to 1 decimal place.
Related Questions
PLEASE HELP! NO FAKE ANSWERS
1. Imagine a person flying straight up from Earth's surface. She would experience different conditions as she goes through the layers of the atmosphere. Some layers are cooler, some are hotter, some have oxygen, and some have almost no molecules. Answer the questions below to describe the conditions in each layer. (10 points)
A. What are the conditions in the troposphere? (2 points)
B. What sort of temperatures would she experience in the stratosphere? What other layer is found within the stratosphere? (3 points)
C. What sort of temperatures would she experience in the mesosphere? (2 points)
D. What sort of temperatures would she experience in the thermosphere? What other layer is found within the thermosphere? (3 points)
Answers
Troposphere, stratosphere, mesosphere, thermosphere and exosphere.
What are five layers of earth?Earth's atmosphere has five major layers.
From lowest to highest, layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.
a) What are the conditions in the troposphere?
The atmospheric temperature descends upward with a slope of ~10 K km−1 for dry air and ~7 K km−1 for wet air in troposphere.
The temperature of troposphere decreases with an increase in height.
B) What sort of temperatures would she experience in the stratosphere? What other layer is found within the stratosphere?
The temperature in the stratosphere ranges from- 60° F at the troposphere boundary to -5°F at the top.
The temperature increase is due to the ozone layer that absorbs ultraviolet light from solar radiation.
C)What sort of temperatures would she experience in the mesosphere?
The temperature in the mesosphere ranges from -2.5°C to -90°C
The temperature decreases because of a decrease in the absorption of penetrating solar radiation.
The atmosphere gets cooler with an increase in altitude because an increase in distance from the Earth's surface.
D)What sort of temperatures would she experience in the thermosphere? What other layer is found within the thermosphere?
4,500°F is the temperature of thermosphere.
Temperatures climb sharply in the lower thermosphere , then level off and hold fairly steady with increasing altitude above that height.
Temperatures in the upper thermosphere can range from about 500° C (932° F) to 2,000° C (3,632° F) or higher.
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a lion is running at constant speed toward a gazelle that is standing still, as shown in the top figure above. after several seconds, the gazelle notices the lion and accelerates directly toward him, hoping to pass the lion and force him to reverse direction. as the gazelle accelerates toward and past the lion, the lion changes direction and accelerates in pursuit of the gazelle. the lion and the gazelle eventually each reach constant but different speeds. which of the following sets of graphs shows a reasonable representation of the velocities of the lion and the gazelle as functions of time?
Answers
The graph shown in the first option nicely plots the lion's and gazelle's velocities as a function of time, so option A is the correct answer.
Velocity is the rate of change of displacement over time.
It has SI units as m/s.The total amount of movement of an object per unit time is also called velocity. It depends on both the size and direction of the moving object.Velocity can also be called as speed when distance is taken into consideration instead of displacement.As mentioned in the problem of running at a constant speed towards a gazelle with a standing lion as shown above.
So option A is correct.
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2. At 6:00 AM a hopital ued it cyclotron to make 1 milligram of the iotope fluorine-18 for ue a a diagnotic tool with it PET canner. The half-life of F-18 i 1. 8 hour. How much F-18 i left at 3:00 PM? At midnight? Should the hopital plan to make more F-18 the next morning?
Answers
Cyclotron to make 1 milligram of the isotope fluorine-18 for use a a diagnostic tool with it PET scanner. It seems that the hospital should plan to make more F-18 the next morning, as the amount remaining at midnight is very small.
The half-life of F-18 is 1.8 hours, so after 1.8 hours, half of the original amount of F-18 will remain. After 3.6 hours, a quarter of the original amount will remain, and so on.
At 3:00 PM (9 hours after the F-18 was made), the hospital will have
= 1/2^(9/1.8)
= 1/2^5
= 1/32
= approximately 0.03125 milligrams of F-18 remaining.
At midnight (18 hours after the F-18 was made), the hospital will have
= 1/2^(18/1.8)
= 1/2^10
= 1/1024
= approximately 0.0009765625 milligrams of F-18 remaining.
While using cyclotron, based on these calculations, it seems that the hospital should plan to make more F-18 the next morning, as the amount remaining at midnight is very small.
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On a day when the speed of sound in air is 340 m/s, a bat emits a shriek whose echo reaches it 0.0250 s later. How far away was the object that reflected back the sound
Answers
The object that reflected back the sound was approximately 8.5 meters away from the bat.
To determine the distance to the object that reflected back the sound, we can use the equation:
Distance = Speed × Time
The speed of sound in air is given as 340 m/s. The time it took for the echo to reach the bat is 0.0250 s.
Substituting these values into the equation, we have:
Distance = 340 m/s × 0.0250 s
Calculating the product, we find:
Distance = 8.5 meters
Therefore, the object that reflected back the sound was approximately 8.5 meters away from the bat.
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What factors affect an objects kinetic energy?
Answers
Answer:
friction
air drag
every thing that opposes the motion affects kinetic energy
Explanation:
kinetic energy is a energy which is increase with increase in motion and potential energy is energy stored while the object is at rest
potential energy ∝ 1/(kinetic energy)
as kinetic energy increases potential energy decreases
What do potential and kinetic energy have in common? **hint: compare their formulas and see what they have in common** Question 5 options: They're both related to density. They're both related to mass. They're both related to volume. None of the above.
Answers
The mass is common in potential and kinetic energy. The potential energy of an object is due to its position.
What is a Potential Energy?The potential energy of an object is due to its position. It can be calculated by the formula,
\(U = mgh\)
Where,
\(U\) - potential energy
\(m\) - mass
\(g\) - gravitation acceleration
\(h\) - height
Kinetic energy:The kinetic energy of an object is due to its motion. It can be calculated by the formula,
\(KE = \dfrac 12 mv^2\)
Where,
\(m\) - mass
\(v\) - velocity
Therefore, the mass is common in potential and kinetic energy.
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why is clay soil chosen for earthenware? Explain it.
Answers
There are many reasons actually...
◇ Clayey soil is easy to mould than the other soils.
The other soils (like sandy soil & loamy soil) are grainy or dry in nature & cannot be moulded. In the ancient times, when technology & the know-hows were still not introduced, people used clayey soul to make earthern pots to store stuff. This practice still continues even today.
◇ It keeps water cool.
Ever wondered why water stored in the earthenware remains cool even on a sunny day? It's because the heat required for evaporation is taken from water inside the pot & thus it cools the water stored inside.
◇ Clayey soil is also moist, durable, more plastic like & easy to retain making it ideal for potters to make earthenware.
__________
Clay soil is used to make earthenwares because, clay can be easily molded to desired sizes and shapes. Clay absorbs water moiety and make the pot very cool inside.
What is clay?Clay is a type of soil made by the sedimentation process near water resources. They are rich in minerals. Clay is rich in silicates and intermolecular force in the soil is comparatively less and can be easily molded any shape and size.
When clay is fired to a high enough temperature, the glass-forming materials in the ceramic form a liquid glass. This glass bridges the gaps between the clay particles. As the pottery cools at the end of the firing process, the glass between the clay particles solidifies again.
Clay pots make the water cooler inside. Hence, clay is used to make earthen wares.
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2. A spacecraft travels at 2 x 108 m/s relative to Earth. An astronaut on board listens to a CD that lasts 50 min.
How long would the CD last as measured by a stationary clock on Earth?
3. A linear particle accelerator is a special machine that accelerates charged particles to nearly the speed of light
and channel them into a beam. When used in research, the beam hits targets and the atoms split. Scientists
gather information about sub-particles, atoms and molecules to further help understand the laws of physics.
A proton of a mass 1.67 x 10–27 kg is accelerated to 0.999 994c. Calculate the ratio of the proton’s relativistic
momentum to the non-relativistic momentum
Answers
This is a time dilation exercise. The time taken for the CD to last as measured by a clock on earth is given as: 67.08 minutes.
What is time dilation?Under the theory of special relativity, time dilation is the "slowing down" of a clock as determined by an observer in relative motion with respect to that clock.
Recall that the equation for time dilation is given as:
t = t₀/√(1- (v²/c²)
Where:
t₀ is the observer in the space craft
t is the observer on earth
v is the speed of the space craft which is given as 2 x 10⁸m/sec
c is the speed of light which is given as 3 x 10⁸m/sec
Hence
v/c = 2 x 10⁸/ 3 x 10⁸
= 2/3
Thus,
t = 5/√(1-(4/9)
= 50 √(9/5)
= 150/√5
= 150 /2.2361
= 67.08 min
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1. a 5.0 kg block is held against a horizontal (well anchored) spring with spring constant 200 n/m. the spring is compressed (with the block in contact with it) and then released to launch the block horizontally. the horizontal surface below the block is not frictionless; the coefficient of friction between the block and surface is 0.30. after the block is no longer in contact with the spring, it continues sliding for 3.0 m before coming to rest. how far was the spring compressed before releasing the block?
Answers
Compression of 0.664 meter will be produced in the spring with spring constant 200N/m before releasing the block.
According to the work-energy theorem, the spring elastic energy will be equal to the work done by the friction.
Spring elastic energy= (1/2)kx²
Work done by friction= μmgd
Therefore, from work-energy theorem:
(1/2)kx² = μmgd
where, mass of the block (m) = 5kg, friction coefficient (μ) = 0.30, distance (d) = 3.0m and spring constant (k) = 200N/m
(1/2) ×200× x² = 0.30 × 9.8 × 3
x² = 0.441 meter
x = 0.664 meter
Hence, 0.664 meter will be the compression in the spring before releasing the block.
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Every particle of matter in the universe attracts every other particle with a force that is directly proportional to the product of the masses of the particles and inversely proportional to the square of the distance between them. True or false?.
Answers
Newton's law of universal gravitation tells us that all particles are attracted to each other with a force that is directly proportional to the product of the masses of the particles and inversely proportional to the square of their distance apart. Hence, the answer to the question is true.
The statement on the question is in line with Newton's law of universal gravitation, which states that "the force of attraction between two objects with masses m1 and m2 is directly proportional to the product of their masses and inversely proportional to the square of their distance apart. The 'force of attraction' stated in the law the law is gravity. Mathematically, it is written as:
\(F= G\frac{m1*m2}{d^{2} }\)
where G is the universal gravitational constant.
This means that the force of gravity between two particles increases as the mass of the particles increase, and gravity exponentially reduces as the distance between the two particles increase.
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Arrange the following in order of increasing radius: O2-, F- , Ne ,Rb+ ,Br- Rb+ < F- < Br- < O2- < Ne Br- < Rb+ < Ne < F- < O2- Ne < F- < O2- < Rb+ < Br- O2- < F- < Ne < Rb+ < Br- O2- < Br- < F- < Ne < Rb + Br- < F- < O2- < Ne < Rb+ F- < O2- < Ne < Br- < Rb + Rb+ < F- < Br- < Ne
Answers
Radii is a vital feature of the elements, and it can be useful in determining the characteristics of elements in various chemical and physical processes. The radii of atoms and ions of the same element differ due to their various charge and mass characteristics.
Atomic and ionic radii increase as you move down a group on the periodic table, and decrease as you move across a period from left to right due to increased nuclear charge, making the electrons closer to the nucleus. The size of an atom and ion also changes due to the number of electrons charge, and electronic configuration.In order of increasing radius, the arrangement of \(Ne, F-, O2-, Br-, Rb\) is given as follows:
\(Ne < F- < O2- < Br- < Rb+\)
Rb+ has the smallest radius due to its large nuclear charge and fewer electrons in the valence shell.
As a result, they are larger than Rb+. O2- has more electrons than Ne and is the largest among the given ions and atoms. It is important to note that in certain conditions, the trends in radii may not be valid because of hybridization and other factors. Nonetheless, this arrangement is valid for the given ions and atoms.
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Find the sum of the measures of the interior angles of a convex 20-gon?
Answers
Answer:
The sum of the exterior angles must always be 360 deg.
Consider an equilateral triangle 3 * 120 = 360
For a square 4 * 90 = 360
For a pentagon 5 * 72 = 360
So for a 20-gon each interior angle = 180 - 18 = 162 with an exterior angle of 18
One must rotate 18 * 20 to get the full 360 deg so the side is back where it started
Since each interior angle = 162 deg one has
20 * 162 = 3240 deg for the sum of the interior angles
A car is traveling constant spoed ol 12 12 m/s When the driver accelerates, the car reaches a speed of 26 m/s in s What is the average acceleration of the
Answers
Answer:
Average acceleration of the car is 1.167 m/s^2
Explanation:
The speed of car with which it is travelling is 12 m/s
As the driver accelerates the car, the speed reaches 26 m/s
The change in speed in 12 seconds is
26 -12 = 14 m/s
Average acceleration is change in speed divided by time
\(\frac{14}{12} \\1.167\) m/s^2
Look at the screen shot and answer
Answers
Meg has two glasses of grape juice. Glass A has 80 grams of juice at 30 °C. Glass B has 80 grams of juice at 50 °C.
Which of the following steps will make the kinetic energy of the molecules of the juice in both glasses equal?
Decrease the temperature of juice in Glass A by 20 °C
Increase the temperature of juice in Glass A by 20 °C
Decrease the temperature of juice in Glass B by 30 °C
Increase the temperature of juice in Glass B by 30 °C
Answers
Answer:
Increase the temperature of juice in Glass A by 20 °C
Answer:
lil baby
Explanation:
Which is the most direct determinants of the amount of tension a muscle can develop?
Answers
The number of motor units that are recruited within a muscle is the most direct indicator of how much tension can build.
What is meant by the term motor units?The fundamental functional components of skeletal muscle are known as motor units, which are defined as a motoneuron and all of its related muscle fibers.
Their function in motor control has been extensively researched. Their activity is the central nervous system's end product.
In summary, motor unit recruitment is the process through which the body activates new motor units to produce stronger muscle contractions and more force.
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A football field with end zones is 120 yards long. Suppose we were to fly over tiger stadium at 0. 8c. How long would the field appear from our spaceship?.
Answers
solution given there
¿Que le ocurre a un folículo después de liberar a un ovulo?
Answers
nesecitabas ayuda hace 1 hora, todavia la nesecitas?
Most energy obtained from water is converted from _____.
groundwater
tidal generators
waterfalls
potential energy behind dams
Answers
Answer: potential energy behind dams
Explanation:
groundwater, tidal generators, and waterfalls don't produce enough kinetic energy.
Why are infrared waves ineffective for treating cancer
Answers
They do not transmit sufficient energy to kill cancer cells. Longer wavelengths than visible light define infrared waves (IR), a kind of electromagnetic radiation.
What are infrared ray?The electromagnetic radiation known as infrared, also referred to as infrared light, has wavelengths that are longer than those of visible light and shorter than those of radio waves. Wavelength range and sources: between 780 nm and 1 mm. Infrared radiation (IR), commonly referred to as heat radiation, is that region of the electromagnetic spectrum with wavelengths above red visible light, between 780 nm and 1 mm. IR can be divided into three groups: IR-A (780 nm-1.4 m), IR-B (1.4-3 m), and IR-C, commonly known as far-IR (3 m-1 mm).
IR wavelengths range from 700 nanometers (frequency 430 THz), which corresponds to the visible spectrum's notional red edge, to 1 millimeter (300 GHz). Long-term IR exposure, according to medical studies, can harm the lens, cornea, and retina, causing cataracts, corneal ulcers, and retinal burns, respectively. Workers can use gear with IR filters or reflective coating to help prevent long-term IR exposure. Electrical warmers, food-cooking appliances, remote controls, optical fibres, security systems, and thermal imaging cameras that can see individuals in the dark all employ infrared (IR) light. whereas, gamma rays, which have the highest energy (and thus the most penetrating), for instance, have higher frequencies than infrared waves.Gamma rays are the electromagnetic waves with the highest energy, highest frequency (300 EHz), and shortest wavelengths (1 pm) (1,24 MeV) and are used in treating cancer.
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Solve problem 2, answer C is not correct.
Answers
Answer:
A 220 N
Explanation:
it’s the only one not marked out on the photo. Hope this helps!
Describe how and where distribution changes
(Need help ASAP, will give brainliest)
Answers
When something is sent, it means it's miles dispersed or allotted amongst a group of human beings, a vicinity, or each.
Economic Distribution: In the study of the field of economics it is viable for the distribution of resources, earnings, and wealth to regulate thru time.
Population Distribution: The distribution of individuals in a given region is defined by way of their spatial arrangement.
Product Distribution: Chain of custody dynamics, client demand, and marketplace pressures all have an effect on how merchandise are allotted.
Information Dissemination: With the improvement of era which include computers and the net, there had been substantial modifications inside the way facts is disseminated.
Thus, this way, distribution changes.
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You kick a soccer ball across a field the ball travels across the field and slowly comes to a stop. Since the ball slowly comes to a stop what does that mean about the acceleration of the ball?
Answers
Answer:
the acceleration is negative which means it is going in the opposite direction of the actual motion which concludes the reason why the ball is slowing down. However, when the ball is stopped, there is no acceleration as the ball is in equilibrium
Explanation:
in the bohr model, what is the ratio of its kinetic energy to its potential energy?
Answers
The centrifugal force C = mv^2/r = kq^2/r^2 = P centripetal force. m is the electron mass, q are the proton and electron charges (opposites), and r is the Bohr radius.
Thus 1/2 mv^2/r = 1/2 kq^2/r^2 and KE = 1/2 mv^2 = 1/2 kq^2/r = 1/2 PE
Therefore KE/PE = 1/2, no matter what state the electron is in.
PLEASE HELP ME
A boulder is raised above the ground so that the gravitational potential energy relative to the ground is 310 J. Then it is dropped. What is its kinetic energy just before it hits the ground?
Answers
Answer:
try this
Explanation:
The energy of a falling object when it hits the ground is equaled to the energy it starts with because the potential energy is converted into kinetic energy entirely with the height at 0. This means the energy would be 200 J.
RESULT
Intensity during a cardiovascular endurance workout means..
A. How often the activity is performed
B. How long the activity is performed
C. How hard the activity is performed
D. Where the activity is performed
Answers
C
Explanation:
It means how hard the activity is performed.To improve cardio respiratory endurance, the frequency of the workout sessions should be: 5 to 7 sessions per week.
a spider is crawling at 630 ft/hr. the room is 15 ft wide. How long does it take the spider to travel
Answers
The time taken for the spider crawling at 630 ft/hr to travel through the 15 ft wide room is 42 hours
How do I determine the time taken for the spider to travel?From the formula of speed, we can obtain a formula for calculating time as illustrated below:
Speed = Distance / time
Cross multiply
Speed × time = Distance
Divide both sides by speed
Time = Distance / speed
Using the above formula, we can obtain the time taken from the spider to travel through the room. Details as follow:
Speed of spider = 630 ft/hrDistance travel = 15 ftTime taken to travel =?Time = Distance / speed
Time = 630 / 15
Time = 42 hours
From the calculation made above, we can conclude that the time taken is 42 hours
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If the distance between two charged particles is quadrupled, the magnitude of the electric force each exerts on the other is changed. If you wanted to change the amount of charge on each of the particles by the same amount so that the force between them went back to its original value, what would you do
Answers
To bring it back to its original value, you have to increase the charge on each of the particles by a factor of 4. This is according to Coulomb's Law.
Coulomb's law states that the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. The mathematical expression for Coulomb's law is:
F = k (q₁ q₂) /r²
Where F is the force between the charges, k is the Coulomb's constant, q₁ and q₂ are the charges on the two particles, and r is the distance between them. From this equation, we can deduce that the force decreases as the distance between them increases.
This is why the magnitude of the electric force each exerts on the other decreases to 1/16th the original value when the distance is quadrupled. To bring the force back to its original value, we have to increase the product of the charges by a factor of 16.
Since the distance is quadrupled, we can deduce that the charges must be increased by a factor of 4 each. Therefore, to bring the force back to its original value, we have to increase the charge on each of the particles by a factor of 4.
If the distance between two charged particles is quadrupled, the magnitude of the electric force each exerts on the other decreases to 1/16th the original value. To bring it back to its original value, you have to increase the charge on each of the particles by a factor of 4. This is according to Coulomb's Law.
Therefore, the amount of charge on each of the particles should be increased by a factor of 4 each to bring the force back to its original value. This is because the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. If the distance is quadrupled, the force decreases to 1/16th the original value. To compensate for this decrease, we have to increase the charges on the particles by a factor of 4 each. When two charged particles are at a distance, they exert a force on each other.
This force is given by Coulomb's law. According to Coulomb's law, the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. This means that if the distance between two charged particles is quadrupled, the force between them decreases to 1/16th the original value. To bring the force back to its original value, we have to increase the charges on the particles by a factor of 4 each. This is because the force is directly proportional to the product of their charges. Therefore, increasing the charges by a factor of 4 each increases the force by a factor of 16. In
if we want to change the amount of charge on each of the particles by the same amount so that the force between them goes back to its original value, we have to increase the charge on each of the particles by a factor of 4.
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determine δhvap for a compound that has a measured vapor pressure of 24.3 torr at 273 k and 135 torr at 325 k.
Answers
The enthalpy of vaporization as determined from the different temperatures is 23.6 kJ/mol.
What is the enthalpy of vaporization?The enthalpy of vaporization has to do with the heat that is given out when a substances is converted from liquid to vapor under standard conditions.
We can use te formula;
ln(P2/P1) = -ΔHvap/R(1/T2 - 1/T1)
P2 = final pressure
P1 = initial pressure
ΔHvap = enthalpy of vaporization
T2 = final temperature
T1 = initial temperature
Then;
ln(135/24.3) = -ΔHvap/8.314 (1/325 - 1/273)
1.7 = -ΔHvap/8.314 (0.0031 - 0.0037)
1.7 = -ΔHvap/8.314 (-0.0006)
1.7 = 0.0006ΔHvap/8.314
To obtain the enthalpy of vaporization here;
ΔHvap = 1.7 * 8.314/0.0006
= 23.6 kJ/mol
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The chart shows the time, initial velocity, and final velocity of three riders.
A 4-column table with 3 rows. The first row labeled rider has entries Gabriella, Franklin, Kendall. The second row labeled time with entries 10 seconds, 8.5 seconds, 6 seconds. The third column labeled initial velocity has entries 55, 50, 53.2. The fourth column labeled final velocity has entries 32, 50, 67.
Which best describes the riders' final velocities ?
Answers
The motion of Gabriella is decelerated.
The motion of Franklin is uniform.
The motion of Kendall is accelerated.
What is acceleration?Acceleration is rate of change of velocity with time. Due to having both direction and magnitude, it is a vector quantity. Si unit of acceleration is meter/second² (m/s²).
As per the given data after interval of time:
The final velocity of Gabriella decreases and the motion is decelerated.
The final velocity of Franklin remains same and the motion is uniform.
The final velocity of Kendall increases and the motion is accelerated.
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