Problem 5. A bullet leaves a rifle with a velocity of 452 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.93 m. Determine the acceleration of the bullet.

It will cost 0.324 Dollars to light six 100w light bulbs for six hours if the price of electrical energy is $0.09/ kwh.

kwh is commercial unit of electric energy. 1 unit= 1 kwh.

When 100 w power device is run for 1 hour, the amount of electrical energy consumed is 1 kwh.

We will find total units of electrical energy consumed in the given question.

energy consumed by 6 bulbs = 6×100= 600 w( joules per second).

The value in kwh is = 600÷1000

                                = 0.6kwh

Total energy consumed in 6 hours is = 0.6×6 = 3.6 kwh

So, the cost is = 3.6×0.09 = 0.324 dollars.

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Answer:

round and count

Explanation:

means arrange, order, organize, etc

Answer:^what he meant was record and count

Explanation:

There is a requirement for 1,638,000 Joules of heat.

Q=I2Rt provides the Joule's heating formula. Joule's heating formula states that the amount of heat produced is proportional to the length of time that the electrical resistance and current are both constant.

The following equation must be used:

Q = m × Lfus + m × Cp × ΔT

Ethyl alcohol has a heat of fusion of 105 J/g and a specific heat capacity of 2.44 J/g°C.

The amount of ethyl alcohol is specified as 7.2 kg, or 7,200 g.

The ethyl alcohol must be melted at a temperature of:

Q1 = m × Lfus =

7,200 g × 105 J/g

= 756,000 J

In order to raise the temperature of the liquid ethyl alcohol from 0°C to 50°C, we must determine the amount of heat needed:

ΔT = 50°C - 0°C

= 50°C

The amount of heat required to raise the temperature of the liquid ethyl alcohol is:

Q2 = m × Cp × ΔT

= 7,200 g × 2.44 J/g°C × 50°C

= 882,000 J

As a result, the total amount of heat needed to transform 7.2 kg of solid ethyl alcohol from -211°C to 50.0°C into a liquid is:

Q = Q1 + Q2 = 756,000 J + 882,000 J

= 1,638,000 J

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A "hot spot" is a non-plate boundary location where mafic magmas are commonly produced. If situated underwater, hot spots can result in the extrusion of pillow basalts.

Hot spots are distinct from diverging, converging, or transform plate boundaries. They occur as stationary areas of volcanic activity, arising from plumes of hot mantle material ascending through the Earth's crust. As tectonic plates move over these hot spots, volcanic activity ensues, often giving rise to chains of volcanic islands or seamounts, as seen in the case of the Hawaiian Islands.

The magma generated at hot spots tends to be mafic in composition, containing a higher proportion of basaltic lava. This contrast to the typically felsic magmas produced at plate boundaries makes hot spots significant in understanding the Earth's geology and volcanic processes.

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The circle of the family tree symbol represents a female individual. Individuals are the main component of a family tree chart.

A pedigree chart is a graph showing the prevalence and incidence of a particular gene or organism and its ancestors from one generation to the next (most commonly humans, show dogs, and horses race). The Family Tree presents family information in an easy-to-read chart. We could simply call it a "family tree". The genealogy uses a standardized set of symbols, with squares representing males and circles representing females. Building the family tree is the story of the family, and as memories fade, details about previous generations can become uncertain.

Diamonds are used if the gender of the person is unknown. Individuals with associated phenotypes are indicated by solid (dark) symbols. Heterozygotes, when identifiable, are indicated by shaded dots in symbols or half-filled symbols.

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Answer:

see below

Explanation:

P1V1 = P2V2

100 000 (.03)  = x ( .025)     x = 120 000 pa

Therefore, the image is formed at a distance of -70 cm from the lens and it is an inverted image with a height of 2.0 cm.

Given data:

Object height (h) = 2.0 cm, Object distance (u) = -70 cm, Focal length (f) = 35 cm

Lens formula is given as follows:

`1/f = 1/u + 1/v`

where, f = focal length of the lens, u = object distance from the lens, v = image distance from the lens

By using the lens formula,

the image distance (v) can be calculated as

:1/f = 1/u + 1/v1/35 = 1/-70 + 1/v1/v = 1/-70 - 1/35 = -3/210 = -1/70v = -70 cm

The negative sign indicates that the image is formed on the same side of the lens as the object.

Therefore, it is an inverted image.

The image height can be calculated using the magnification formula which is given as follows:

`m = -v/u`

where, m = magnification

v = image distance from the lens, u = object distance from the lens

Substituting the values, we get:

`m = -v/u`

`m = -(-70)/(-70)

`m = 1

The positive value of magnification indicates that the image is an upright image.

The height of the image can be calculated as:

`m = -v/u``1 = -v/(-70)`v = -70 cm

`h_i = m × h_o`

`h_i = 1 × 2.0 = 2.0 cm

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The system described by the transfer function G(s) = -co² s² + 2a + w², with a damping ratio of 1.3 and a natural frequency of 0.5, has an overdamped unit step response. So, the correct option is (E)

The transfer function of the system is given as G(s) = -co² s² + 2a + w², where co represents the damping ratio, a represents an arbitrary constant, and w represents the natural frequency of the system. We are given that the natural frequency is 0.5 and the damping ratio is 1.3.

To determine the type of unit step response, we need to analyze the damping ratio (co) in relation to the critical damping value (co_critical).

The critical damping ratio (co_critical) is defined as the value where the system is on the threshold between being overdamped and underdamped. It is given by the formula co_critical = 2 * sqrt(a * w²).

In our case, the natural frequency (w) is 0.5, so we can calculate co_critical as follows: co_critical = 2 * sqrt(a * 0.5²).

Since the damping ratio (co) is given as 1.3, we can compare it with co_critical to determine the type of unit step response.

If co > co_critical, the system is considered overdamped (Option E).

If co = co_critical, the system is considered critically damped (Option D).

If co < co_critical, the system is considered underdamped (Option C).

Based on the given values, we can determine that the system is overdamped (Option E) because the damping ratio (1.3) is greater than the critical damping ratio.

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Answer:

Explanation:

is this marked??

(a). The car's average velocity between t = 1.0s to t = 1.5s will be - \(1\;m/s\)

(b). The car's acceleration at t = 1.5s will be - \(0.4\;m/s^{2}\)

(c). Car's speed is increasing with time.

We have a a remote controlled toy car that starts from rest and begins to accelerate in a straight line.

We have to determine -

        t = 1.0 s  to  t = 1.5 s.

The rate of change of velocity with respect to time is called Acceleration. Mathematically -

\($a=\frac{dv}{dt}\)

According to the question, we have the following data for the Car -

t = 0s → x = 0m

t = 0.5s → x = 0.1m

t = 1.0s → x = 0.4m

t = 1.5s → x = 0.9m

t = 2.0s → x = 1.6m

PART - A

The car's average velocity between t = 1.0s to t = 1.5s will be -

\($v_{avg} = \frac{0.9-0.4}{1.5-1}= 1 m/s\)

PART - B

Velocity at t = 1.5 s will be -

\($v(1.5)=\frac{0.9}{1.5}= 0.6\;m/s\)

The car's acceleration at t = 1.5s will be -

\($a(1.5) = \frac{v}{t} = \frac{0.6}{1.5} = 0.4\;m/s^{2}\)

PART - C

Since, the acceleration of the car is positive, this means that the car is accelerating in the forward direction. Hence, its speed is increasing with time.

[ The following data was missing in your answer. The complete question would include this data also -

t = 0s → x = 0m

t = 0.5s → x = 0.1m

t = 1.0s → x = 0.4m

t = 1.5s → x = 0.9m

t = 2.0s → x = 1.6m ]

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Answer:

The long, light-colored lines extending from many craters on the Moon are called rays and are "crater rays".

Explanation:

Hope this helps :)

#Followformore

Answer:

Answer is C

Explanation:

I took it already

Answer:

The answer is C. Ralph: “I’m not sure about bananas. I’d have to think about it.”

Explanation:

I did the practice.

Answer:

C.) Ralph: "I'm not sure about bananas. I'd have to think about it."

Explanation:

Just took the practice

Answer:Electricity is the flow of electrons. All matter is made up of atoms, and an atom has a center, called a nucleus. When electrons are "lost" from an atom, the free movement of these electrons constitutes an electric current. Electricity is a basic part of nature and it is one of our most widely used forms of energy.

Explanation:

Answer:

Explanation:

The three things that are connected in the system that causes us to see the moon's phases are the moon, the sun, and the Earth. As the moon orbits around the Earth, it also receives sunlight from the sun.

Depending on the moon's position in relation to the sun and the Earth, different portions of the moon's surface are illuminated. When the moon is between the sun and the Earth, we see the side of the moon that is not illuminated, which is known as the new moon phase. As the moon moves in its orbit, we see different portions of the illuminated side of the moon, which causes the different phases such as crescent, half-moon, and full moon. The changing phases of the moon occur due to the interaction of these three celestial bodies in the system, which is also known as the lunar cycle.

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Answer:

What was your sleep situation like during your time in space? Did you get more or fewer hours of sleep than when you were on earth? I would be very interested in learning about their answer because they still have to perform tasks that require energy and obviously they would need to sleep but do they have to strap themselves down on a bed so they don't float away? Is it easy to fall asleep in space or would your body be confused because time is so much different that it doesn't even follow the same time zones as on earth? That is why I find this to be interesting for them to answer.

Did you have any activities to do aside from researching and your tasks that were mandatory? What would they have done in their free time? I can’t imagine simply doing work the whole time, did they get to bring along certain games or time wasters to do while in space? I would just be really curious to find out how they occupied their free time or if they even had free time.

What was the most difficult part about being in space? Was it terrifying or was the work overwhelming? Was it scary thinking about returning to earth or staying in space for too long? There are so many ways to answer this question so I would be very interested in understanding their fears and their reason for being afraid.

Explanation:

The Gram-Schmidt procedure is used to find an orthonormal basis for a vector space spanned by given vectors. The resulting orthonormal basis provides a set of vectors that are mutually orthogonal and have unit lengths.

The Gram-Schmidt procedure is a method to construct an orthonormal basis from a set of linearly independent vectors. It involves a series of steps:

Start with the given set of vectors, let's say {v1, v2, v3, ..., vn}.

Set the first vector of the orthonormal basis as the unit vector of the first vector in the given set, i.e., u1 = v1 / ||v1||, where ||v1|| represents the norm (magnitude) of v1.

For each subsequent vector in the given set, subtract the projection of the vector onto the previously constructed orthonormal basis. This ensures that the new vector is orthogonal to the previous ones.

Normalize the resulting vector by dividing it by its norm to obtain the corresponding orthonormal vector.

Repeat steps 3 and 4 for all the remaining vectors in the given set.

By following these steps, we can construct an orthonormal basis for the vector space spanned by the given vectors. The resulting orthonormal basis will consist of vectors that are mutually orthogonal and have unit length, satisfying the desired properties.

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Answer:

All adjustments in issue include changes in energy. Energy is either delivered or consumed. The energy is often in the form of heat, however it might be in the form of sound or light.

Explanation:

this is in my own words btw:)

Answer:

300 J (Joules)

A Joule will measure "the amount of work done when a force of one newton is exerted through a distance of one meter"

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A distance-time graph is a straight line for constant speed.  In a distance-time graph, the x-axis represents time and the y-axis represents distance. When an object is moving at a constant speed, the distance it covers over time increases at a steady rate. This results in a straight line on the graph, where the slope of the line indicates the constant speed.

A distance-time graph shows the distance an object travels over a period of time. If the object is moving at a constant speed, then the graph will be a straight line. This is because the distance traveled in each unit of time is the same, so the slope of the line (which represents the speed) will be constant.

On the other hand, if the object is accelerating, the graph will not be a straight line, as the speed is increasing over time. Similarly, momentum has to do with the mass and velocity of an object, and is not directly related to distance and time. Average speed can also vary over time, so the graph would not be a straight line for this variable either.

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The thermal energy needed to melt 1.25 kg of water at its melting point is 416.25 kJ.

The latent heat of fusion is the amount of thermal energy required to change the phase of a substance from a solid to a liquid state without a change in temperature.

When a substance is in a solid state, the molecules are packed closely together and are held in a rigid structure by intermolecular forces. As heat is added to the solid, the temperature of the substance increases until it reaches the melting point, which is the temperature at which the solid starts to change into a liquid.

At the melting point, the added thermal energy is used to break the intermolecular bonds that hold the molecules in the solid structure. The energy absorbed during this process causes the molecules to become less ordered and to move more freely, resulting in a liquid state. However, during the melting process, the temperature of the substance remains constant until all of the solid has melted.

The latent heat of fusion is a property of the substance and is defined as the amount of energy required per unit mass to change the phase from solid to liquid. It is usually measured in units of joules per kilogram (J/kg) or kilojoules per kilogram (kJ/kg).

The latent heat of fusion is an important concept in thermodynamics and is used in many applications, such as the melting of ice, the solidification of molten metals, and the formation of igneous rocks.

Here in the Question,

To calculate the thermal energy needed to melt 1.25 kg of water at its melting point, we can use the formula:

Q = mass x latent heat of fusion

where Q is the thermal energy required, and the latent heat of fusion is the amount of energy required to change the phase of a substance from solid to liquid without changing its temperature.

Substituting the given values, we get:

Q = 1.25 kg x 333 kJ/kg

Q = 416.25 kJ

Therefore, 1.25 kilogram of water requires 416.25 kJ of thermal energy to melt at its melting point.

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Answer:

periodic motion

Explanation:

The massive object is affectionately referred to as the pendulum bob. When the bob is displaced from equilibrium and then released, it begins its back and forth vibration about its fixed equilibrium position. The motion is regular and repeating, an example of periodic motion.

The focal length of a magnifying glass can be calculated using the formula: magnification = (1 + (D/f)), where D is the distance between the object and the lens, f is the focal length of the lens.

Rearranging the formula to solve for f, we get: f = D/(magnification - 1).

Given that the angular magnification is 7.0 x and the near point of the person is at 28 cm, we can assume that the object is at the near point of the person, i.e., D = 28 cm. Substituting the values, we get f = 4 cm.

Therefore, the focal length of the magnifying glass that produces an angular magnification of 7.0 x when used by a person with a near point at 28 cm is 4 cm.

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The diver under the sea sees the sunset at an angle of 48.24 degrees from the vertical.

To find the angle at which a diver under the water sees the sunset, we need to consider the refraction of light at the water's surface. We can use Snell's Law to determine this angle.

1. Identify the known values:
   The index of refraction of air (n₁) is approximately 1.00
   The index of refraction of water (n₂) is 1.34
   The angle of incidence (θ₁) is 90 degrees, as the light rays from the sunset are coming in horizontally

2. Apply Snell's Law, which states: n₁ * sin(θ₁) = n₂ * sin(θ₂)
   Plug in the known values: 1.00 * sin(90) = 1.34 * sin(θ₂)

3. Calculate sin(θ₂):
   sin(90) = 1
   sin(θ₂) = 1 / 1.34 = 0.746

4. Determine the angle θ₂:
   θ₂ = arcsin(0.746) = 48.24 degrees

The diver under the water sees the sunset at an angle of approximately 48.24 degrees with respect to the vertical.

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Answer:

no is not hard to walk on sand and yes it's hard for ice

Explanation:

ice is liquid

C. inside stars that died before Earth formed.

Most of the material that makes up Earth and all life on Earth, including humans, was formed inside stars that died billions of years ago. As these stars exploded in supernovae, they released the elements and compounds that make up everything around us, including carbon, nitrogen, oxygen, and iron. These materials eventually coalesced into planets like Earth, which became home to living organisms. So, we owe our existence to the stars that came before us.

These stars underwent nuclear reactions, creating heavier elements that were later released into the universe during their death. This material eventually contributed to the formation of our solar system, including Earth and its inhabitants.

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Answer:

Relationship between population size, carrying capacity, and limiting factors is described below.

Explanation:

1. There are four variables which govern changes in population size.

births

deaths

immigration

emigration

A population gains individuals by birth and immigration and loses individuals by death and emigration.

2. Populations vary in their capacity to grow. The maximum rate at which a population can increase when resources are unlimited and environmental conditions are ideal is termed the population's biotic potential.

3. There are always limits to population growth in nature. Populations cannot grow exponentially indefinitely. Exploding populations always reach a size limit imposed by the shortage of one or more factors such as water, space, and nutrients or by adverse conditions such as disease, drought and temperature extremes.

4. The factors which act jointly to limit a population's growth are termed the environmental resistance. The interplay of biotic potential and density-dependent environmental resistance keeps a population in balance.

5. Carrying Capacity

For a given region, carrying capacity is the maximum number of individuals of a given species that an area's resources can sustain indefinitely without significantly depleting or degrading those resources. Determining the carrying capacities for most organisms is fairly straightforward. For humans carrying capacity is much more complicated. The definition is expanded to include not degrading our cultural and social environments and not harming the physical environment in ways that would adversely affect future generations.

6. Population Impact

Homo sapiens is a species possessing a diversity of individual needs. Thus, sub-populations will have different requirements and different impacts on the environment. For example 100 million vegetarians will have a significantly different environmental impact than 100 million meat-eaters. This can be demonstrated by comparing the affect on water supplies by both sub-populations. About 1000 tons of water are needed to produce 1 ton of grain. Almost 40% of all grain is used in meat and poultry production. Add to this the amount of water that goes into the production of meat, and you can see that meat comsumption places more stress on global water supplies than grain consumption.

Hope this helps (: Mark me brainliest if its good to you.

Answer:

Yes you are right

Explanation:

hope this helps and I get the Brain thingy whatever it call