Miguel added 150 grams of baking soda to a liter of water at 20 °C. No matter how long he keeps stirring the solution, he can’t get all of the baking soda to dissolve. Explain why.

Maximum error in the result of the sum of measurement is equal to the sum absolute error of the individual observed measurements

(a) The maximum error in D is 0.09

(b) The standard error in D is approximately 0.034

The procedure for arriving at the above values is as follows;

The given measurements and the sited errors are;

A = 15.21 + 0.01

B = 10.82 + 0.05

C = 11.00 + 0.03

D = A + B + C

(a) Required parameter;

To calculate the maximum error in D

The equation for the propagation of error in addition is presented as follows;

Given that we have;

x = a + b

Therefore;

x + ±Δx = (a ± Δa) + (b ± Δb) = a + b ± (Δa + Δb)

∴ Δx = Δa + Δb

From the above formula, we have;

Where;

D = A + B + C

The maximum error in D = The sum of the maximum error in A, B, C

∴ The maximum error in D = 0.01 + 0.05 + 0.03 = 0.09

(b) Required parameter:

To find the standard error in D

The standard error is the sampling distribution's standard deviation, SD

Variance = SD²

The combined variance, SD² = The sum of the squares of individual standard deviations

Given that the standard errors represents the standard deviation, we get;

The combined variance, SD² = 0.01² + 0.05² + 0.03²

The combined variance, SD = √(0.01² + 0.05² + 0.03²) = 0.059

\(Standard \ error = \dfrac{SD}{\sqrt{n} }\)

Where n = 3, for the three measurement, we get;

\(Standard \ error = \dfrac{\sqrt{0.01^2 + 0.05^2 + 0.03^2} }{\sqrt{3} } \approx 0.034\)

The standard error in D is approximately 0.034

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Answer:

Heat

Explanation:

Because chemical energy is stored, it is a form of potential energy. When a chemical reaction takes place, the stored chemical energy is released. Heat is often produced as a by-product of a chemical reaction – this is called an exothermic reaction.

Hope this helped.

Explanation:

Answer Should be B.

Its in Form of Heat.

The number of Neon’s p-orbitals that are completely filled in its ground state is 3.

In Neon's case, since its p-orbitals are located on the second energy level, it contains a total of three p-orbitals 2px, 2py and 2pz and all three of them are filled as there are 4 electrons in s orbital and in total of 6 electrons in its p-orbital, thus completely filling it.

This configuration with all the orbitals completely filled also makes it a noble gas. It is due to the fact that it has no extra orbital to exchange electron from other element and form a bond.

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Answer:

4.2 into the atmosphere

Explanation:

Carbon movement into atmosphere :

Carbon movement in the sinks :

Net Carbon Movement :

Answer:

amplitude

Explanation:

A loud sound has large very high amplitude

Answer:

X: Absorbs energy from the core.

Y: Releases energy to the photosphere.

Explanation:

Convection is a mode of heat transfer through fluids (liquids or gas), and it requires material medium for its propagation.

The energy absorbed from the core of the Sun, is transferred through X (convection zone) by convectional process, and it flows to Y (radiative zone). Since the regions X and Y have different functions, the heat propagates from X causing photons to traverse through Y where it get released into the photosphere or the Sun's surface.

Therefore;

X: Absorbs energy from the core.

Y: Releases energy to the photosphere.

Answer:

X: Takes longer for photons to move through

Y: Releases energy to the photosphere

Explanation:

The steam engine moves a piston back and forth inside a cylinder using the force created by the pressure of the steam. A connecting rod and crank can convert this pushing force into a rotational force for wo

Because electric and diesel locomotives are faster, more effective, and simpler to operate, steam locomotives are no longer utilized to transport people or goods. The locomotives that are still in operation are historical artifacts from the 1800s that serve as a great reminder of how far we've come.

Simply explained, steam engines generate heat energy by boiling water and producing steam using fire and coal (chemical energy). This heat energy is then used to push the cylinder and piston, which in turn moves the wheels (kinetic).

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Answer:

The car stops in 7.78s and does not spare the child.

Explanation:

In order to know if the car stops before the distance to the child, you take into account the following equation:

\(x=x_o+v_ot-\frac{1}{2}at^2\)        (1)

vo: initial speed of the car = 45km/h

a: deceleration of the car = 2 m/s^2

t: time

xo: initial distance to the child = 25m

x: final distance to the child = 0m

It is necessary that the solution of the equation (1) for time t are real.

You first convert the initial speed to m/s, then replace the values of the parameters and solve the quadratic polynomial for t:

\(45\frac{km}{h}*\frac{1h}{3600s}*\frac{1000m}{1km}=12.5\frac{m}{s}\)

\(0=25+12.5t-2t^2\\\\2t^2-12.5t-25=0\\\\t_{1,2}=\frac{-(-12.5)\pm \sqrt{(-12.5)^2-4(2)(-25)}}{2(2)}\\\\t_{1,2}=\frac{12.25\pm 18.87}{4}\\\\t_1=7.78s\\\\t_2=-1.65s\)

You take the first value t1 because it has physical meaning.

The solution for t is real, then, the car stops in 7.78s and does not spare the child.

Answer:

18.9 m.

Explanation:

From the question given above, the following data were obtained:

Initial velocity (u) = 0 m/s

Final velocity (v) = 70 km/h

Height (h) =?

Next, we shall convert 70 km/h to m/s. This can be obtained as follow:

3.6 km/h = 1 m/s

Therefore,

70 km/h = 70 km/h × 1 m/s / 3.6 km/h

70 km/h = 19.44 m/s

Finally, we shall determine the height. This can be obtained as follow:

Initial velocity (u) = 0 m/s

Final velocity (v) = 19.44 m/s

Acceleration due to gravity (g) = 10 m/s²

Height (h) =?

v² = u² + 2gh

19.44² = 0² + (2 × 10 × h)

377.9136 = 0 + 20h

377.9136 = 20h

Divide both side by 20

h = 377.9136 / 20

h = 18.9 m

Thus, the car will fall from a height of 18.9 m

The frequency of light when it reaches Earth is approximately 4.988 x 10^14 Hz.

Explanation:-

Given:

Emitted frequency of light, f = 5.000 x 10^14 Hz,

Speed of the galaxy receding from Earth, v_src = 4500 km/s.

We need to convert the speed of the galaxy from km/s to m/s:

v_src = 4500 km/s * (1000 m/km)

v_src = 4.5 x 10^6 m/s

Plugging the given values into the Doppler effect formula:

f' = (5.000 x 10^14 Hz) * (3.00 x 10^8 m/s + 0 m/s) / (3.00 x 10^8 m/s + 4.5 x 10^6 m/s)

Simplifying the expression:

f' = (5.000 x 10^14 Hz) * (3.00 x 10^8 m/s) / (3.00 x 10^8 m/s + 4.5 x 10^6 m/s)

f' ≈ 4.988 x 10^14 Hz

Therefore, the frequency of light when it reaches Earth is approximately 4.988 x 10^14 Hz.

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The radius of the event horizon of a 10-Solar-mass black hole is 2950 kilometers.

The radius of the event horizon of a black hole is known as the Schwarzschild radius and it is a function of the mass of the black hole. The Schwarzschild radius is given by the formula:

r = 2GM/c^2

where

r = radius of the event horizon (in meters)

G = gravitational constant (6.674 x 10^-11 N*(m/kg)^2)

M = mass of the black hole (in kg)

c = speed of light in a vacuum (2.998 x 10^8 m/s)

For a 10-Solar-mass black hole, we can use the mass conversion factor 1 Solar mass = 1.989 x 10^30 kg.

M = 10 x 1.989 x 10^30 kg

Now, we can substitute the values into the formula

r = 2 x 6.674 x 10^-11 x M/ (2.998 x 10^8)^2

r = 2GM/c^2 = 2 x 6.674 x 10^-11 x (10 x 1.989 x 10^30) / (2.998 x 10^8)^2

r = 2.95 x 10^3 m = 2950 kilometers

So, the radius of the event horizon of a 10-Solar-mass black hole is 2950 kilometers.

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The amplitude of vibration is approximately 0.024 m, which corresponds to option A).

The amplitude of vibration, we can use the formula relating the maximum speed of an object in simple harmonic motion to its amplitude and the spring constant. The maximum speed of the object is equal to the angular frequency multiplied by the amplitude.

Given that the mass of the object is 0.50 kg and the spring constant is 20 N/m, we can calculate the angular frequency using the formula ω = √(k/m), where k is the spring constant and m is the mass.

ω = √(20 N/m / 0.50 kg) = √40 rad/s

The maximum speed of the object is given as 1.5 m/s, which is equal to the angular frequency multiplied by the amplitude:

1.5 m/s = √40 rad/s × A

Solving for A, we get:

A = 1.5 m/s / √40 rad/s ≈ 0.024 m

The amplitude of vibration is approximately 0.024 m, which corresponds to option A).

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The momentum of an object can be calculated with the formula below:

Where p is the momentum, m is the mass and v is the velocity.

The mass of the bus is greater than the mass of the car.

So, if they have the same velocity, the momentum of the bus will be greater.

Correct option: a.

Answer:

2.5 Hz

Explanation:

3.0m/s / 1.2 m=2.5 1/s=2/5 Hz

The frequency of a wave with speed of 3.0 m/s and has a wavelength of 1.2m is 2.5 Hz.

The frequency of a wave is the number of cycles per second.

Given the wavelength is 1.2 m and speed v =3.0m/s, then the frequency of the wave is

v =fλ

f = 3 / 1.2

f = 2.5 Hz

Thus, the frequency of the wave is 2.5 Hz.

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Answer:

A. A coil of wire with current running through it

Answer:if you have different ans your may be a soleno with a current running though it.

Explanation:

Ape.x

The person would suffer a shock in becomes part of an electrical circuit.

When a person becomes part of an electrical circuit, they can suffer a shock if the voltage of the circuit is high enough to cause injury. This occurs when the electrical current passes through the person's body, causing disruption of their normal body functions.

The severity of the shock depends on the amount of current passing through their body and its duration. In some cases, the person may experience temporary or long-term memory loss due to the shock.

When a person becomes part of an electrical circuit, it is important to take proper safety precautions to prevent injury.

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The time delay for the signal between Earth and Mars can range from approximately 3 minutes and 6 seconds to 22 minutes and 15 seconds.

Since the distance between Earth and Mars varies depending on their relative position, we can calculate the maximum delay time and minimum delay time.

The speed of light is approximately 299,792,458 meters per second.

Maximum distance between Earth and Mars: 400 * 10^6 km

Time delay:  (400 * 10^6 km * 1000) / (299,792,458 m/s) = 1,335 seconds/ 22 minutes and 15 seconds

Minimum distance between Earth and Mars: 56 * 10^6 km

Time delay:(56 * 10^6 km * 1000) / (299,792,458 m/s) = 186 seconds/3 minutes and 6 seconds

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An isolated, one solar-mass star will eventually exhaust its nuclear fuel and begin to cool and contract, forming a white dwarf and eventually a black dwarf. The process of fusion of helium into heavier elements will cause the star to expand and become a red giant. The outer layers will be expelled into space, creating a planetary nebula.

An isolated, one solar-mass star will die through the following steps:
1. Main Sequence: The star spends most of its life in the main sequence phase, where it converts hydrogen into helium through nuclear fusion in its core.
2. Red Giant: As the hydrogen fuel in the core is exhausted, the star expands and becomes a red giant. The outer layers expand and cool, while the core contracts and heats up.
3. Helium Fusion: When the core reaches a high enough temperature, helium fusion begins. The star now fuses helium into carbon and oxygen.
4. Planetary Nebula: As the helium in the core gets depleted, the outer layers of the star are expelled, creating a beautiful cloud of gas and dust called a planetary nebula.
5. White Dwarf: The remaining core of the star cools and contracts, becoming a white dwarf. This is the final stage of the isolated, one solar-mass star.
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Answer:

It’s stratosphere

Explanation:

Most ozone is found in a region of Earth’s atmosphere between 10 and 20 miles above Earth’s surface. This temperature zone of the atmosphere is known as the stratosphere.

Ozone is an allotrope of oxygen. It is blue in color and it is found in Earth's atmosphere. It protects the Earth from ultraviolet rays from the Sun.

The ozone subcaste is centered at an altitude between 10-15 country miles (15-25 km). Close to 90% of the ozone found in the atmosphere is in the stratosphere. Ozone that is found in this region is about 10 parts per million by volume (ppmv) to the troposphere's 0.04 ppmv.

Therefore, we have determined that Most ozone is found in a region of Earth’s atmosphere between 10 and 20 miles above Earth’s surface. This temperature zone of the atmosphere is known as the stratosphere.

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Answer:

B - Average Kinetic Energy decreases

Explanation:

As the water vapor cools the molecules becomes less excited. Less excitement means less movement, hence less kinetic energy

Answer:

C. physical model

Explanation:

Sana nakatulong

Answer:

These layers are the troposphere, the stratosphere, the mesosphere and the thermosphere.

A further region, beginning about 500 km above the Earth's surface, is called the exosphere.

Explanation:

Hope this helps you. Have a nice day. Please mark as brainliest. It helps a lot.^_^

Answer: It has the skill to nest

sorry if I'm wrong

Answer:

B: A colorful beak

Explanation:

i hope this helped!

If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is 20.8 hours.

option D is the correct answer.

Half life is the time that it takes for half of the original value of some amount of a radioactive element to decay.

If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is calculated as follows;

1,000 ---------- 0 time

500 ----------- 10.4 hours

125 ------------- 20.8 hours

Thus, from the calculation done above, we can see that If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is 20.8 hours.

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The average change in momentum for the car during the trip is 8400 kg·m/s.

What is Momentum?

Momentum is a vector quantity, meaning it has both magnitude and direction. The direction of momentum is the same as the direction of velocity, and its magnitude is proportional to both the mass and the velocity of the object.

Then, we calculate the final momentum of the car during the remaining 3 hours:

Final momentum during the remaining 3 hours = mass × final velocity during the remaining 3 hours = m × v2

Now, we can calculate the average change in momentum:

Average change in momentum = Final momentum - Initial momentum

= (Final momentum during the first 2 hours + Final momentum during the remaining 3 hours) - Initial momentum

= [(m × v2) + (m × v2)] - (m × v1)

= 2m × v2 - m × v1

Plugging in the given values:

Mass of the car (m) = 1400 kg

Initial velocity (v1) = 32 m/s

Final velocity during the first 2 hours (v2) = 38 m/s

Average change in momentum = 2m × v2 - m × v1

= 2 × 1400 kg × 38 m/s - 1400 kg × 32 m/s

= 53200 kg·m/s - 44800 kg·m/s

= 8400 kg·m/s

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Answer:

its false

Explanation:

since the penny is thrown straight up its not going to move forwad with you and the bus since it has no forces pushing on it. If the bus wasn't moving it would land back on your hand

The required apparent frequency is F₀ = 1389.47 Hz

When a wave source and its observer move in close proximity to one another, the phenomenon known as the Doppler Effect occurs. Doppler, Christian Johann's discovery, is the process by which starlight increases or decreases depending on the relative motion of the star.

The Doppler effect occurs because each wave's crest emerges from a location that is closer to the observer than the crest of the previous wave when the wave source is moving in the direction of the observer.

According to the Doppler's Effect of sound waves :

F₀ = \(\frac{FV}{V-V_{0} }\)

where : F₀ = the apparent frequency

V = is the sound of a sound wave

F = is the actual frequency of sound

V₀ = is the source velocity

Substituting the values in the formula :

F₀ = \(\frac{580 X 55.1}{55.1 - 32.1}\)

F₀ = \(\frac{31,958}{23}\)

F₀ = 1389.47 Hz

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