Can anyone help me with this problem? It is -2.1??

Final answer:

The extra work required to stretch the Hooke's-law spring an additional 11.3 cm is 0.9375 J.

Explanation:

To find the extra work required to stretch the Hooke's-law spring an additional 11.3 cm, we can use the formula for the work done by a spring force: W = ½kx², where W is the work done, k is the spring constant, and x is the displacement. Given that it takes 3.3 J of work to stretch the spring 15 cm, we can first find the spring constant:

k = 2W / x² = 2(3.3 J) / (0.15 m)² = 146.67 N/m

Now we can calculate the extra work required to stretch the spring an additional 11.3 cm:

W' = ½kx'² = ½(146.67 N/m)(0.113 m)² = 0.9375 J

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.

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:

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.

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.

Final answer:

Acceleration is the rate of change of velocity over time. The acceleration of the air in m/s² when sneezing at 155 km/h in 0.70 s is approximately 61.51 m/s².

Explanation:

Acceleration is the rate of change of velocity over time. In this case, the air in your lungs accelerates from rest to 155 km/h in approximately 0.70 s. To calculate the acceleration in m/s², we convert the final velocity to m/s and use the formula for acceleration.

Given: Initial velocity = 0 m/s, Final velocity = 155 km/h = 43.06 m/s, Time = 0.70 s. Acceleration = (Final velocity - Initial velocity) / Time.

Substitute the values: Acceleration = (43.06 m/s - 0 m/s) / 0.70 s = 61.51 m/s².

*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

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

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.

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.

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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Answer:

Because it is refracting

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.

Answer:

4+5=9 amu

Explanation:

Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons.

Hope this helps! :)))))

The total distance traveled by the ball before it finally comes to rest will be 50 m.

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.

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.

The magnitude of the velocity swung in uniform circular motion is equal 4 m/s.

Given the following data:

To calculate the magnitude of the velocity:

Mathematically, centripetal force is given by the formula:

[tex]F_c = \frac{mv^2}{r}[/tex]

Making v the subject of formula, we have:

[tex]V = \sqrt{\frac{F_c r}{m} }[/tex]

Substituting the parameters into the formula, we have;

[tex]V = \sqrt{\frac{4 \times 2}{0.5} }\\\\V = \sqrt{\frac{8}{0.5} }\\\\V =\sqrt{16}[/tex]

V = 4 m/s

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