Does the world have a responsibility to assist t millions of people in a country that does not provide for their needs?

The sample from the bottom has more of the substance than the sample from the top, is because of the heterogeneous mixture.

The mixture is a combination of two or more substances dispersed in one another and it retains its original property. The mixture is of two types and they are a homogenous and heterogeneous mixture.

A heterogeneous mixture is a mixture of two or more substances that are dissimilar structures and they are unevenly distributed in the mixture. It is a mixture with non-uniform composition and the molecules can be separated into their constituents by filtering or magnetic separation etc.  

Hence, from the observation, Kathleen observed uneven distribution of the mixture. Thus, the sample is a heterogeneous mixture.

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Answer:

Convex lens

hope that helps you

Answer:

Larger than mercury, venus, earth, mars, uranus, neptune

smaller than jupiter

Answer:

Change in velocity = 4 m/s and acceleration = 0.5 m/s²

Explanation:

Given that,

Initial velocity, u = 3 m/s

Final velocity, v = 7 m/s

Time, t = 8 seconds

(a) The change in velocity of a cyclist.

\(\Delta v=v-u\\\\=7\ m/s-3\ m/s\\\\=4\ m/s\)

(b) Acceleration,

\(a=\dfrac{\Delta v}{t}\\\\a=\dfrac{4\ m/s}{8\ s}\\\\a=0.5\ m/s^2\)

So, the change in velocity is 4 m/s and acceleration is 0.5 m/s².

Answer: 5.5m/s^2

Explanation:

Answer: The angle of incidence equals the ray of reflection. So this law states that any ray of light that strikes an object will reflect off the object such that the striking or incident angle is identical to the reflecting angle (as measured from the normal).

Explanation:

Answer:

made 72

Explanation:

X axis says any of its values should be divison by 9. So you would multiply 8and 9 which gets you 72.

Explanation:

(coal burned transforming chemical to thermal)

(steam turns turbines, transforming thermal into mechanical)

Potential energy always leads to kinetic energy when it is released.

Answer:

No and yes it's like a 30%or 20%

Explanation:

"researchers say that there is no proof that dimples are inherited."

meaning that if the mom or dad had dimples it might have a chance or no since a dominant trait not a recessive trait

The force that is needed to accelerate the arrow is 49 Newtons.

To determine magnitude of the force needed to give a 0.25 kg arrow an acceleration of 196 m/s², we can use the equation of force:

F = ma

where F is the force, m is the mass, and a is the acceleration.

Given that m = 0.25 kg and a = 196 m/s², we can substitute these values into the equation and solve for F:

F = (0.25 kg)(196 m/s²)

F = 49 N

So the force needed to give a 0.25 kg arrow an acceleration of 196 m/s² is 49 N. This is the correct answer out of the options given.

To arrive at this answer we used Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. Thus, we were able to use the equation "F = ma" (where F is force, m is mass and a is acceleration) to solve for the force required to accelerate the arrow at 196 m/s².

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The equivalent measurement of 11.5 milliamperes is 11.5 x 10⁻³ amperes.

The rate of flow of charge per unit cross - sectional area is called electric current. Mathematically -

i = dq/dt

From this -

dq = i dt

∫dq = ∫i dt

Q = it

Current is measured in amperes and is a Tensor quantity.

Given is a circuit that measured a current of 11.5 milli amperes.

Now, the current in milli amperes is used to give the measurement of small amount of current. One milliampere of current is equivalent to -

1 mA = (1/1000) A = 10 ⁻³ A

So, in order to calculate the total current in amperes, we will multiply 11.5 milliamperes by 10 ⁻³ as follows -

11.5 milliamperes [mA] = 11.5 x 10⁻³ amperes[A]

Therefore, the equivalent measurement of 11.5 milliamperes is 11.5 x 10⁻³ amperes.

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A special (speci) observation would be made if the ceiling decreased from 1,000 ft to 900 ft agl.

The global standard code for hourly and unique surface weather measurements is SPECI.

A SPECI message is the same as a METAR but is broadcast only when necessary. It is a unique observation message that draws attention to any noteworthy change that has occurred since the last METAR or SPECI was published.

Aeronautical decision making is a systematic approach to the mental process used by aircraft pilots to consistently to determine the best course of action in response to a given set of circumstances.

Inflight briefing should be requested in those cases where an update to a previous briefing needs to be obtained over an aircraft's radio.

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ANSWERS

(a) Year - Population

• 1980 - 101,240

• 1990 - 142,949

• 2000 - 201,843

• 2010 - 285,000

(b) 2016

EXPLANATION

(a) The population (in thousands) each year is given by,

If t = 1 represents year 1971, then for each year we have to find the difference between the year and 1970.

For year 1980,

The population is 101,240.

For year 1990,

The population is 142,949.

For year 2000,

The population is 201,843.

For year 2010,

The population is 285,000.

(b) In this problem we're given the population 350,000 and we have to find in what year the county will reach that population. In other words, we have to find t and then add that to 1970 to find the year.

Let's solve for t,

Divide both sides by 71.7,

Apply natural logarithm to both sides,

Divide both sides by 0.0345,

And finally replace P and solve. Remember that P is in thousands of years, so we have to replace it by 350,

This is 46 years after 1970,

Let's see what's the population in 2016 to check the answer,

It is a bit more than 350,000. But let's see what's the population in 2015,

In 2015 population of the county won't reach 350,000. Thus, the county will have a population of 350,000 in 2016

At equal pressure, less lp(liquefied petroleum) gas will flow through an orifice than natural gas. False.

At equal pressure, LP (liquefied petroleum) gas will generally flow through an orifice more easily than natural gas. This is due to the differences in the physical properties of the two gases.

LP gas, such as propane or butane, is stored in a liquid state under pressure. When the pressure is released, it vaporizes and becomes a gas. As a result, LP gas has a higher energy content and a higher vapor pressure compared to natural gas.

On the other hand, natural gas primarily consists of methane and is typically supplied through pipelines. It is in a gaseous state at normal atmospheric conditions.

When an orifice or a restricted opening is present, the flow rate of gas is determined by several factors, including the pressure difference across the orifice, the size of the orifice, and the properties of the gas.

Given equal pressure conditions, LP gas will tend to flow more readily through an orifice compared to natural gas. This is because LP gas has a higher vapor pressure, which means it has a greater tendency to expand and fill the available space. The higher energy content of LP gas also contributes to its ability to flow more easily through the orifice.

Therefore, the statement that less LP gas will flow through an orifice than natural gas at equal pressure is false. LP gas is expected to flow more readily through the orifice compared to natural gas.

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A girl rides her cycle round a circular track of diameter 60 m. The track is banked at 15° to the horizontal. The coefficient of friction between the track and the tyres of the cycle is 0.25. Modelling the girl and her cycle as a particle of mass 60 kg moving in a horizontal circle, the minimum speed at which she can travel without slipping is 13.64 m/s.

To find the minimum speed at which the girl can travel without slipping, we need to consider the forces acting on her and her cycle as they move in a circular track.

The forces acting on the girl and her cycle are the gravitational force (mg), the normal force (N), and the frictional force (f). The frictional force provides the centripetal force necessary to keep the girl moving in a circular path.

The normal force can be resolved into two components: the vertical component (N⊥) and the horizontal component (N∥). The vertical component balances the gravitational force, while the horizontal component provides the centripetal force.

Mass of the girl and cycle (m) = 60 kg

Diameter of the circular track (d) = 60 m

Bank angle (θ) = 15 degrees

Coefficient of friction (μ) = 0.25

Find the normal force components:

N⊥ = mg cos(θ)

N∥ = mg sin(θ)

The frictional force:

f = μN⊥

The frictional force (f) provides the centripetal force required for circular motion:

f = m(v² / r)

Here, v is the velocity and r is the radius of the circular track. The radius is:

r = d / 2

Combining the equations, we have:

μN⊥ = m(v² / r)

Substituting the values we have:

μmg cos(θ) = m(v² / (d / 2))

v² = (μmg cos(θ) / m) * (d / 2)

v² = (μg cos(θ)) * (d / 2)

v = √((μg cos(θ)) * (d / 2))

v = √((0.25 * 9.8 * cos(15)) * (60 / 2))

v ≈ 13.64 m/s

Therefore, the minimum speed at which the girl can travel without slipping is approximately 13.64 m/s.

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Explanation:

1 For a sound wave, the pitch is determined by which wave characteristic?

A - Frequency

2 Which of the following waves cannot be transmitted through a vacuum?

C - Sound waves

3 Which of the following could be the value of a wavelength that is found in the visible region of the electromagnetic spectrum?

B - 5 × 10^-7 m

4 Sophie is trying to measure the speed of sound. She stands 24.0 m away from a wall and claps repeatedly, changing the frequency until the echo synchronized with her claps. If she calculates the speed of sound as 325 m • s-1 how long did she wait between claps?

The time between her claps and the echo is twice the time it takes for the sound to travel from her to the wall. Therefore, the time between her claps is:

time = distance/speed = 2 x 24.0 m/325 m/s = 0.148 seconds (to three significant figures).

So the answer is 0.148, without units and correct to three significant figures

The value of length of secant DE in the intersecting secants is determined as 21.3.

The length of segment DE is calculated by applying the following theorem of intersecting secants.

This theorem states that the product of two secants of a chord is equal to the product of the two secants of the second chord.

From the given diagram, we will have the following equation;

(whole secant) (external part) = (whole secant) (external part)

BF x (FC) = EF x ( FD)

The given parameters;

length CB = 13

length BF = 9

length EF = 7

Length FD = DE + EF = DE + 7

Length FC = CB + BF = 13 + 9 = 22

The value of length of DE is calculated as follows;

9 x 22 = 7(DE + 7 )

198 = 7DE + 49

7DE = 149

DE = 149/7

DE = 21.3

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The missing diagram is in the image attached.

Answer:

680.4

Explanation:

the formula is V1 over T1 is equals (=) to V2 over T2 .

and we have been given that

V1 represents 315

T1 represents 25°c

V2 is unknown and what we're finding

T2 represents 54°c

so 315×54 all over 25 ...gives you 680.4

Answer:

20 5/6 sec

Explanation:

To find the solution we divide 5000 by 240

However, when you see a problem, always try to simplify

5000/240=500/24=250/12=125/6

Now the division is much easier

20 5/6 sec

It would take 20.833 seconds for an airplane to fly 5000 meters if it maintains a speed of 240 meters per second.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem we have to find out, how long it take an airplane to fly 5000 meters  if it maintains a speed of 240 meters per second,

The total distance covered by the plane = 5000 meters

the speed of the plane = 240 meters/seconds

Time is taken by plane = distance /speed of the plane

                                       = 5000 meters/240 meters/seconds

                                        = 20.833 seconds

Thus, It would take 20.833 seconds for an airplane to fly 5000 meters if it maintains a speed of 240 meters per second.

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Answer:

The heat necessary to warm 500g of water from 20°C to 65°C is 37,620 J.

Explanation:

GIVEN: m = 500 gm, T₂ = 65°C AND T₁  = 20°C, we know that c (specific heat capacity) = 4180

TO FIND: The heat necessary to warm 500g of water from 20°C to 65°C.

SOLUTION:

By using the heat equation,

              Q=m c ΔT  

             ΔT = T₂ - T1

             ΔT = 65 - 20 = 45°C

In this case,

Q = 0.2 × 4180 × 45 = 37,620 J

Answer:

g = 1.62 N/kg

Explanation:

g = GM/r²

  = (6.67 x 10⁻¹¹   x   7.35 x 10²²) / (1738 x 10³)²

  = 1.62 N/kg

Hope this helps!

The maximum volume of water a hamster bath could hold with a depth of 1(2)/(3), a length of 2(1)/(3), and a width of 2 inches is **approximately 9.62 cubic inches**.

To calculate the volume of the hamster bath, we multiply the length, width, and depth together. Converting the mixed numbers to improper fractions, we have a depth of 5/3, a length of 7/3, and a width of 2 inches. Multiplying these values, we get (5/3) * (7/3) * 2 = 70/9 ≈ 7.78 cubic inches. However, since we are dealing with water and measuring volume, it is important to consider that water fills the available space completely. Hence, we need to round down to the nearest whole number, resulting in a maximum volume of approximately 7 cubic inches.

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Answer:

kilograms

Explanation:

kilograms is a measurement of weight, not volume

Answer:

When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.

Explanation:

An atom has an equal quantity of positive and negative electric charges (the protons and electrons) when its electron and proton counts are equal (the protons). Since the atom has a total electric charge of zero, it is referred regarded as being neutral.

The atom is the smallest unit of matter that may be divided without resulting in electrically charged particles. Additionally, it is the tiniest substance with features like chemical elements. The atom is therefore the basic building block of chemistry.

Examine different electron arrangements in the electron shells that surround an atom's nucleus.

Examine different electron arrangements in the electron shells that surround an atom's nucleus. The rest is made up of a cloud of negatively charged electrons surrounding a positively charged nucleus made up of protons and neutrons. Compared to electrons, which are the lightest charged particles in nature, the nucleus is small and dense.

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The tail shape of a surfboard greatly affected the board's interaction with the wave's face and the flowing of water flowing.

The tail shape of a surfboard affects how the board depends on the wave's face, and the water flowing between it. More comprehensive, thicker tail shapes have more surface area and assist the board to float and create lift - allowing the surfboard to plane over the surface of the water more efficiently.

The shape of both the surfboard and its fin swap the way the water moves around it if you can grab a wave as well as the turning ability of the surfboard.

So we can conclude that Surfboard bottom outlines are also essential. Concave and V-shaped contours have similar performances, for all opposite designs.

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The highest frequency the other string could have is 127 Hz + 6 Hz = 133 Hz.

In order to solve this problem, you'll need to consider the beat frequency and the known frequency of one string. The beat frequency is the difference in frequency between the two strings. Since the beat frequency is 6 Hz and one string is tuned to 127 Hz,  the highest frequency the other string could have is 127 Hz + 6 Hz = 133 Hz.

Frequency is the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.

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Answer:

it has most potential at highest point (not in space), But kinetic at lowest

Answer: When the ball is highest in the air it has the most potential energy and it has the most kinetic energy when it is about to hit the ground thats when it is moving fastest.

A crystal or is a solid material whose constituents are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions

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