To calculate the car's acceleration, we convert the initial speed of 60 mph to 26.8 m/s and the final speed of 30 mph to 13.4 m/s. Using the acceleration formula (final velocity minus initial velocity divided by time), the acceleration is found to be [tex]-0.0186 m/s^2[/tex] over the 720 seconds (12 minutes), indicating that the car is decelerating.
To calculate the acceleration of the car, we first need to convert the speeds from miles per hour to meters per second (m/s). Since the car slows down, the acceleration will be negative. The initial speed is 60 mph, which is equivalent to 60 imes 1609/3600 m/s or approximately 26.8 m/s. The final speed is 30 mph, which is equivalent to 30 1609/3600 m/s or approximately 13.4 m/s. The time taken to slow down is 12 minutes, which is 12 60 seconds or 720 seconds. Now we use the formula for acceleration, which is a = (v_f - v_i) / t, where v_f is the final velocity, v_i is the initial velocity, and t is the time taken. Thus, the acceleration a is (13.4 m/s - 26.8 m/s) / 720 s = [tex]-0.0186 m/s^2[/tex]. The negative sign indicates that the car is decelerating.
Environmental factors can cause various changes in ecosystems. Which of the following would most likely have the greatest lasting effect on an ecosystem
*100% CORRECT ANSWERS
Question 1
Climate warming trends allow plant and insect species to inhabit larger ranges.
True
Question 2
What is a possible consequence of climate change to species that have a narrow temperature tolerance range?
all of the above
Question 3
Which of the following is not a possible effect of rising carbon dioxide levels on plants?
increased plant mortality
Question 4
How does an early onset of spring through climate change affect plants?
their growing and flowering season starts earlier and is longer
Question 5
Environmental factors can cause various changes in ecosystems. Which of the following would most likely have the greatest lasting effect on an ecosystem?
change to the landscape from construction
Question 6
How does change to an ecosystem that results in succession benefit the ecosystem?
it leads to an increased level of biodiversity
Question 7
How do the benefits of natural change to ecosystems compare to the disadvantages?
the benefits outweigh the disadvantages
Question 8
Environmental factors can have various effects on ecosystems. In August 2005, Hurricane Katrina caused significant damage in several states along the Gulf Coast, including Alabama, Mississippi, and Louisiana. Thousands of people were evacuated from their homes due to flooding and other damage caused by the storm. What environmental impact would Hurricane Katrina not have caused?
early onset of spring
Question 9
Rising levels of carbon dioxide most likely
have a greater detrimental effect on the sea
Question 10
Which scenario best describes how climate trends might affect animal migration?
animals found at the equator may move north
4. Which statement best describes the movement of particles when a wave travels through a medium? The particles are (10 points)
A. moved along in a forward motion with the wave as it travels through the medium.
B.gathered by the energy of the wave and move along in the direction of the wave.
C. permanently displaced in a direction opposite to the direction of the wave.
D.temporarily displaced and return to their normal position when the wave passes.
Answer:
D.temporarily displaced and return to their normal position when the wave passes.
Explanation:
When a wave propagates in a medium, it does going through the particles that exist in that space.
Those are altered by the wave that crosses them but, that phenomenon only lasts the time takes to pass through, then the particles return to their natural state.
why cant body builders swim please give reasons.
When a constant force acts on an object, what does the object's change in momentum depend upon? check all that apply. check all that apply. the change in momentum depends upon the change in the velocity of the object. the change in momentum depends upon the mass of the object. the change in momentum depends upon the change in the position of the object. the change in momentum depends upon the time interval during which the force acts. the change in momentum depends upon the magnitude of the force?
Answer: These are correct
1) The change in momentum depends upon the change in the velocity of the object
2) The change in momentum depends upon the mass of the object
3) The change in momentum depends upon the magnitude of the force
4) The change in momentum depends upon the time interval during which the force acts.
Explanation:
Which factors affect the electrical force between two objects?
mass and distance between them
charge and distance between them
mass and electric field strength
charge and mass
Explanation :
The force that exerts between two charged particles is called the electrical force. Coulomb has given the whole description of the electrical force.
He has given a law which states that the electrical force between two charged particle is directly proportional to the product of their charges and inversely proportional to the square of the distance between.
Mathematically, it can be written as :
[tex]F=\dfrac{1}{4\pi \epsilon_o}\dfrac{q_1q_2}{r^2}[/tex]
Where
q₁ and q₂ are the charges
r is the distance between charges
[tex]\dfrac{1}{4\pi \epsilon_o}[/tex] is the electrostatic constant
So, it is clear that the electrical force between two objects depends on charges and the distance between them.
Hence, the correct option is (b) " charge and distance between them ".
The charge and distance between two objects affect the electrical force between them.
The term 'electric force' refers to the attractive or repulsive forces between two electrically charged objects.An attractive force occurs when charges (i.e., protons and electrons) attract one another, whereas a repulsive force occurs charges repel each other.The attractive/repulsive forces between two objects are directly proportional to the distance between them.In conclusion, the charge and distance between two objects affect the electrical force between them.
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What happens to the electronegativity of elements as you move from bottom left to upper right across the periodic table?
Answer:
increases
Explanation:
Anaerobic means “without oxygen”.
Question 1 options:
True
False
If you put a straw into a glass of water, the straw looks to be bent, although nothing has really happened to the straw. The term that describes this property of light is
Answer:
Because it is refracting
When brought to the surface of the moon will a mass have more or less weight than it did on the surface of the earth, or will it be the same in weight?
The mass will stay the same, however it will weigh less because the moon's acceleration of gravity is less than the suns.
I hope this helps you.
All the outer planet have rings, but the planet with the most complex
An ideal gas undergoes an adiabatic process and does 25 joules of work on its environment. What is the change in internal energy? a.50 joules b. 25 joules c. 0 joules d. -25 joules
Answer:
The change in internal energy will be 25 J.
Explanation:
Given that,
Work done = 25 J
Using first law of thermodynamics
The internal energy is sum of the heat and work done.
[tex]\Delta U= Q+ W[/tex]
Where, [tex]\Delta U[/tex] = Change in internal energy
Q = heat
W = work done
In adiabatic process, the heat does not change, it remains constant.
So the heat Q = 0
Therefore, The change in internal energy will be
[tex]\Delta U=0+25 J[/tex]
[tex]\Delta U= 25 J[/tex]
Hence, The change in internal energy will be 25 J.
When a tennis ball is dropped onto a tennis court from a height of h the ball rebounds to a height of 3 5 h feet. if the ball is initially dropped from a height of 10 feet, find the total distance traveled by the ball before it finally comes to rest?
The total distance traveled by the ball before it finally comes to rest will be 50 m.
What is the distance?Distance is a numerical representation of the distance between two objects or locations.
The distance can refer to a physical length or an estimate based on other factors in physics or common use. |AB| is a symbol for the distance between two points A and B.
The first drop makes the ball travel 10 m.
Then the maximum height decreases to 16 x 0.81 = 12.96m
If we make a pattern, this forms a geometric progression in which the common ratio is 0.6 and the first term is 10.
The sum of this series will be;
[tex]\rm \sum d= \frac{a}{1-r} \\\\ \sum d= \frac{10}{1-0.6} \\\\ \sum d= 25 m[/tex]
This is the upward height, and the ball returns every time so:
Total distance = 25 x 2= 50
Hence the total distance traveled by the ball before it finally comes to rest will be 50 m.
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The total distance a tennis ball travels before coming to rest after being dropped from 10 feet and rebounding to 3/5 of its previous height is 25 feet, calculated using the sum of an infinite geometric series.
When a tennis ball is dropped from a height, it bounces back but doesn't reach the original height due to energy loss. For a tennis ball dropped from 10 feet and rebounding to 3/5 of the height, the pattern of the ball's motion forms a geometric sequence with the common ratio being the fraction of the height to which it rebounds. Here, that ratio is 3/5.
The total distance traveled would be sum of all descents and ascents. The first descent is 10 feet, and the first ascent is 3/5 of that, which is 6 feet. The ball would continue to rise and fall, with each height being 3/5 of the one before it.
Using the formula for the sum of an infinite geometric series S = a/(1 - r), where a is the first term and r is the common ratio, the total distance traveled can be calculated. For this problem, a is 10 feet and r is 3/5. Thus, the sum S representing the total distance before coming to rest is:
S = 10 / (1 - 3/5) = 10 / (2/5) = 25 feet.
Therefore, the total distance the ball travels before it comes to rest is 25 feet.
Steel has a density of 7.8 g/cm3. what is the mass of a block of steel with a volume of 600.0 cm3?
The mass of a steel block with a volume of 600.0 cm3 and a density of 7.8 g/cm3 is 4680 grams, or 4.68 kilograms.
To calculate the mass of a block of steel given its density and volume, you use the formula mass = density imes volume. Since the density of steel is given as 7.8 g/cm3 and the volume of the block is 600.0 cm3, you can find the mass by multiplying these two numbers together. Therefore, the mass of the steel block is 7.8 g/cm3 imes 600.0 cm3 = 4680 grams or 4.68 kilograms when converted to kilograms.
An example of a stable ecosystem is a...
A 4 kg car with frictionless wheels is on a ramp that makes a 25° angle with the horizontal. The car is connected to a 1 kg mass by a string that passes over a frictionless pulley.
What is the acceleration of the car?
What best describes the energy in a closed system at the beginning of a day and the energy at the end of the same day? Check all that apply.
Some energy can disappear after it has caused motion.
Some energy can be changed from one form to another.
Some energy can be lost to the environment around the system.
The total initial energy will be equal to the total final energy.
The total initial energy will be greater than the total final energy.
Friction can cause energy to be destroyed during the day.
Friction can cause the amount of thermal energy to increase.
The options which are apply on it;
2. Some energy can be changed from one form to another.
4. The total initial energy will be equal to the total final energy.
7.Friction can cause the amount of thermal energy to increase.
Energy can not be created or destroyed it can only be converted from one form to another.
Melinda enters college with plans to join the Peace Corps after graduation. She hopes to promote an end to discrimination against women. To what level of moral reasoning is she likely aspiring?
Newton's second law of motion tells us that the net force applied to an object equals its ________.
A scuba diver's tank contains 0.240 kg of o2 compressed into a volume of 3.10 l. what volume (in liters) would this oxygen occupy at 27.0 ºc and 0.910 atm?
Turquoise is what types of rocks sedimentary, metamorphic or igneous
What are the two most important properties of a telescope?
The two key properties of a telescope include its light gathering ability, allowing the viewing of faint and distant objects, and resolving power, which enables detailed viewing of closely spaced objects.
Explanation:The two most important properties of a telescope are its light gathering ability and resolving power. The light gathering ability, determined by the diameter of the lens or mirror, allows the telescope to collect more light which means the telescope can see fainter objects. For example, larger telescopes can see more distant stars and galaxies.
On the other hand, the resolving power, or the ability to distinguish between two closely spaced objects, depends on the quality of the optics and the viewing conditions. This property allows for the detailed viewing of objects. For instance, a telescope with high resolving power can detail the rings of Saturn or the craters of the Moon.
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In an overhead camshaft engine, the lobes make direct contact with the
A. valve springs. B. rocker arms. C. valve guides. D. tappets.
Answer: B. Rocker arms
Explanation: In an overhead camshaft (OHC) engine,
the camshaft, rocker arms, valve springs, and valves are all
located in the cylinder head. The camshaft is driven off the
crankshaft by using a timing chain. The lobes press directly
up onto rocker arms, and the rocker arms push down on the
valves to open them
list three commonly used units for speed
The pressure in a fluid is affected by which characteristic of that fluid?
A. The weight of the fluid
B. The gravity of fluid
C. The amount of oxygen atoms in the fluid
D. The amount of hydrogen atoms in the fluid
Answer:
A. The weight of the fluid
An object has a mass of 20 g and a volume of 5 cm3. what is the object's density? 4 g/cm3 100 g/cm3 0.25 g/cm3
Which theory is closest to the cognitive arousal theory
A) cannon-bard theory
B) Lazarus cognitive-meditational theory
C) common sense theory
D) james-lange theory
The correct answer is option B, Lazarus cognitive-meditational theory
According to the Lazarus cognitive-meditational theory, proposed by Lazarus, a stimulus can lead to the generation of personal meaning due to the cognition. This further stimulates both arousal and the emotion.
For example – If we suddenly hear scream of a group of people, the first thought that will come to our mind is the that there is something potentially dangerous and this generate both physiological responses such as rapid heart rate and trembling, and the subjective experience of fear.
Rowdy Ron, a racecar driver with a mass of 70kg, survived a crash at 175km/h. He came at rest ib only 0.027 seconds
A ball is thrown straight upward. When it has reached the highest point in its motion, and is momentarily stopped, its acceleration is
"The correct answer is that the ball's acceleration at the highest point in its motion is due to gravity.
When a ball is thrown straight upward, it slows down as it rises due to the acceleration due to gravity, which acts downward. At the highest point in its trajectory, the ball comes to a temporary stop before it starts to fall back down. At this instant, the velocity of the ball is zero, but the acceleration due to gravity is still acting on the ball.
The acceleration of an object in free fall, which includes a ball thrown upward, is constant and is equal to the acceleration due to gravity (g). Near the surface of the Earth, the acceleration due to gravity is approximately [tex]\( g = 9.81 \, \text{m/s}^2 \)[/tex]downward. This value is independent of the mass of the object and remains constant regardless of the object's position or velocity.
Therefore, even though the ball's velocity is zero at the highest point, it is still experiencing an acceleration of [tex]\( 9.81 \, \text{m/s}^2 \)[/tex] downward, which is the acceleration due to gravity. This is why the ball will start to fall back down to Earth after reaching its peak height."
Which category of materials does concrete belong to and why?
1. It’s a synthetic polymer because it’s a product of a chemical reaction.
2. It’s an alloy because it contains layers of different components.
3 .It’s a ceramic because it contains substances such as sand and clay.
4. It’s a composite because it’s a mixture of cement, sand, and other granular pieces.
Answer:
Correct Answer is option 4 (It’s a composite because it’s a mixture of cement, sand, and other granular pieces.)
Explanation:
Concrete :
Concrete is a mixture which is made up of sand, cement, granular pieces and water. sand can be spread anywhere in liquid form and when it dries it becomes hard as stone. Concrete is used for making buildings.
Composite:
Composite is a material which is formed by mixing various element
Since Concrete is formed on mixing various element like cement, granular pieces, water and sand. Therefore concrete is a material which belong to composite category.
Which method will correctly determine whether the forces on an object are balanced or unbalanced?
Add the forces in the horizontal direction to the forces in the vertical direction.
Add the forces in the horizontal and vertical directions separately.
Subtract the forces in the horizontal direction from the forces in the vertical direction.
Subtract the forces in the vertical direction from the forces in the horizontal direction.