Calculate the following sum, and express the answer in meters. Follow the rules for significant figures.
(25.873 km) + (1024 m) + (3.0 cm) =

Answer:

y = m λ L / d

must use lasers of greater wavelength

Explanation:

The expression for the constructive interference of a double slit is

           d sin θ = m λ

let's use trigonometry to find the angle

          tan θ = y / L

in interference phenomena the angles are small

         tan θ= sin θ/ cos θ = sin θ

         sin θ = y / L

we subjugate

         d y / L = m λ

         y = m λ L / d

In this expression we see that the separation of the lines (and) increases linearly with the wavelength, therefore we must use lasers of greater wavelength

X has a magnitude of around 1.11.

The cosine and sine of a vector's direction angle can be used to calculate the scalar x-component, while the magnitude and cosine of the vector's direction angle can be used to calculate the scalar y-component.

By multiplying the first equation by (4+j5) and the second equation by (3+j4) and adding the resulting equations, we can use the method of elimination to solve this system of equations:

(3+j4)(4-j5)x + (3+j4)(4+j5)y = (18+j13)(3+j4)

(4-j2)(3+j4)x - (4+j5)(3+j4)y = (-5+j10)(4+j5)

Simplifying, we get:

53x + 47y = 78 + 43j

10x - 29y = 15 - 37j

By multiplying the first equation by 29 and the second equation by 47, then removing, we may eliminate y and arrive at the solution for x:

1537x = 1695 - 1150j

Therefore, x = (1695 - 1150j)/1537.

To find the magnitude of x, we calculate the absolute value:

|x| = |(1695 - 1150j)/1537| = √((1695/1537)² + (-1150/1537)²) = 1.11

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Answer:

the difference is when object is in rest its potential when object is in motion its kenitic energy

The detail how the kinetic is transformed into potential energy in the Newton's Cradle example is discussed in the answer.

The Newton's Cradle is an apparatus that uses spheres in motion to show how momentum and energy are conserved. One of the stationary spheres at the end is lifted and released, striking them and sending a force through them that forces the final sphere higher. In order to recreate the effect in the other way, the final sphere swings back and collides with the virtually stationary spheres.

In  Newton's Cradle, one or many balls have to rise at the staring. Tis provides potential energy. When the balls fall, this potential energy transfers into kinetic energy. When balls of  Newton's Cradle collides, kinetic energy transfers from one ball to another, that's why they moves simultaneously.

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Cold food should be kept at or below 4 degrees Celsius (39 degrees Fahrenheit) to ensure food safety.

Keeping cold food at temperatures below 4 degrees Celsius helps prevent the growth of harmful bacteria that can cause foodborne illnesses. Refrigeration slows down the multiplication of bacteria and helps preserve the quality and safety of perishable foods. It is important to store food in the refrigerator promptly after preparation and maintain a consistent cold temperature to minimize the risk of bacterial growth. Regularly monitoring the refrigerator's temperature and ensuring it is set to the appropriate level can help maintain the safety of cold food items. Additionally, practicing good food handling and storage practices, such as covering and properly packaging food, further contributes to maintaining food safety.

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Answer:

It allows us to understand nature much more deeply than does qualitative description alone.

Explanation:

Without explaining the measurements, a quantity cannot always be measured.

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The experimental evidence led to the development of have gathered new evidence. One of the atomic models this atomic model from the one before it is the colors of light emitted from heated atoms had very specific energies.

As scientific knowledge about the structure of the atom has changed, so have models of the atom.

The Rutherford planetary model, which depicts electrons travelling around the nucleus like planets move around the sun in the solar system, is the direct precursor of the model illustrated in the figure attached.

This model was created as a result of the study of light hues released by heated atoms with highly particular energies.

The Bohr model of the atom is so named because Niels Bohr had a major role in developing it. The passage of electrons between energy levels caused the light hues released by heated atoms. Electrons are grouped in shells or energy levels.

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Answer:

Magnitude

Explanation:

Each value in nature has a number part, called its magnitude and a dimension called its unit.

For example,

The length of an object is 10 cm. It means that 10 shows the magnitude of length and cm shows its unit.

Explanation:

Given that,

Mass of a truck = 15,000 kg

Speed of the truck = 25 m/s

Mass of car = 1,100 kg

Speed of the car = 15 m/s

As they stick together after the collision. Let V be the speed after the collision.

Initial momentum of the system,

\(P_i=15000\times25+1100\times15\\\\=391500\ kg-m/s\)

Final momentum of the system,

\(P_f=(15000+1100)V\\\\=16100V\)

Hence, this is the required solution.

Answer:

Explanation:

1. He had the opportunity to have a chance of doing experimental research where he began to develop a theory on electromagnetism. He was then recognized in 1884 and appointed to chair of physics at Cavendish Laboratory. In 1914 there was a new type of physics that lead to more questions than there were answers for and that is when Thomson began associating himself with this new type of physics.

2. Thomson began experimenting with the cathode ray tubes that showed him that all atoms contain small negatively charged particles/electrons. His proposition to the atom was shown with is plum pudding model, which showed negatively charged electrons that were embedded in a positive charge. His discovery came before the discovery of the atomic nucleus that would be included in the electron in the atomic model.

3.His contributions to the atomic model include that all matter is made of atoms, atoms are invisible and indestructible, all atoms in a certain element are identical, two or more atoms that are combined form a compound, and a chemical reaction is the rearrangement of the atoms. His ideas of the atomic model that do not exist in the modern day atomic model include the fact that the distribution of the negative and positive particles was not uniform.

Websites:

https://socratic.org/questions/why-was-j-j-thomson-wrong

https://www.khanacademy.org/science/ap-chemistry/electronic-structure-of-atoms-ap/history-of-atomic-structure-ap/a/discovery-of-the-electron-and-nucleus#:~:text=Summary-,J.J.,positively%2Dcharged%20%22soup.%22

Answer:

The specific heat of the 1st block is B. 0.64 J/g-K

Explanation:

Answer:

B

Explanation:

it is the specific heat

Since the net electric flux which is − 6.89 × 10^6 V⋅m through the hull of the submarine is negative, the number of electric field lines leaving the submarine is less than the number entering it.

A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has the more limited underwater capability. Most large submarines consist of a cylindrical body with hemispherical (or conical) ends and a vertical structure, usually located amidships, that houses communications and sensing devices as well as periscopes. In modern submarines, this structure is the "sail".

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The resistance of a 20-cm-long column of blood in the femoral artery is approximately 40.6 ohms.

We can use the formula for the resistance of a cylindrical conductor:

R = (ρ * L) / A

where:

R is the resistance

ρ is the resistivity of the material

L is the length of the conductor

A is the cross-sectional area of the conductor

In this case, the conductor is a column of blood with length L = 20 cm and resistivity ρ = 1.6 ohm m. The cross-sectional area A is given by the formula for the area of a circle:

A = π * r^2

where r is the radius of the artery. Since the diameter of the artery is 1.0 cm, its radius is 0.5 cm = 0.005 m. Therefore:

A = π * (0.005 m)^2 = 7.85 × 10^-5 m^2

Substituting these values into the formula for resistance, we get:

R = (1.6 ohm m * 0.2 m) / 7.85 × 10^-5 m^2

R = 40.6 ohms

Therefore, the resistance of a 20-cm-long column of blood in the femoral artery is approximately 40.6 ohms.

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Answer:

0.8 g/cm^3

Explanation:

mass of liquid = mass of beaker + liquid - mass of beaker

= 170g -130g = 40 g

density = mass/ volume

therefore:

density of volume = \(\frac{40g}{50cm^3} = 0.8 g/cm^3\)

where need be for 3 significant figure or 2 decimal place, just add zeros at the back of the 8

The correct terms that fills the box are;

(i) The incident ray

(ii) The normal

(iii) The reflected ray

(iv) The angle of incident

(v) The reflected angle

The terms of the ray diagram is illustrated as follows;

(i) This arrow indicates the incident ray, which is known as the incoming ray.

(ii) This arrow indicates the normal, a perpendicular line to the plane of incidence.

(iii) This arrow indicates the reflected ray; the out going arrow.

(iv) This the angle of incident or incident angle.

(v) This is the reflected angle or angle of reflection.

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the distance of Venus from the Sun in kilometers is: 107,708,467 km

One astronomical unit (au) is approximately equal to 149.6 million kilometers. Therefore, Venus orbits the sun at a distance of approximately 224.4 million kilometers (1.5 x 149.6 million km) from the sun.
Hi! Venus orbits the Sun at a distance of approximately 0.72 AU (not 1.5 AU). To convert this distance to kilometers, you can use the following formula:

1 AU (Astronomical Unit) = 149,597,870.7 km

So, the distance of Venus from the Sun in kilometers is:

0.72 AU × 149,597,870.7 km/AU ≈ 107,708,467 km

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Answer:

the answer would be conductors

The exact distance from the seismic station to the epicenter is 6000 km.

The earthquake's epicenter is the point above the fault location on the earth's surface.

Given that:

A p-wave arrives at 3:00:00 and the s-wave arrives at 3:07:20.

Difference in arrival time = 3:07:20 - 3:00:00 = 7 minutes 20 seconds

From the earthquake time travel graph, a time difference of 7 min 20 sec is at x = 6

The exact distance from the seismic station to the epicenter is 6000 km.

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Given:

The initial velocity is

The initial position is x1 = 2.76 cm

The final position is x2 = - 5 cm

The time will be t = 2.25 s

To find the acceleration.

Explanation:

The acceleration can be calculated by the formula

Here, the displacement is

On substituting the values, the acceleration will be

Final Answer: The acceleration is -12.84 cm/s^2

For example, in machine components it is common to use kinematics analysis to determine the (unknown) speed of an object, that is connected to another object moving at a known speed. For example, one may wish to determine the linear velocity of a piston connected to a flywheel that is turning at a known speed.

hope this helps you and your wellcome :)

Answer:

I think its D.....

Answer:

The correct option is;

πR³(2/3 + (1/3)cos³θ - cosθ)

Explanation:

The volume of a segment of a sphere is given by the relation;

\(V = \pi \cdot h^2 \cdot \left (R - \dfrac{h}{3} \right)\)

We note that h = R - R·cos(θ)

Therefore by substituting the value of h in the equation of a segment of a sphere, we have;

\(V = \pi \cdot \left (R - R\cdot cos(\theta) \right ) ^2 \cdot \left (R - \dfrac{\left (R - R\cdot cos(\theta) \right )}{3} \right)\)

Which gives;

\(\dfrac{R^3\cdot \pi \cdot cos^3 (\theta) -3 \cdot R^3 \cdot\pi \cdot cos (\theta) + 2 \cdot R^3 \cdot \pi}{3}\)

\(R^3\cdot \pi \cdot \left (\dfrac{cos^3 (\theta) -3 \cdot cos (\theta) + 2 }{3} \right )\)

\(R^3\cdot \pi \cdot \left (\dfrac{cos^3 (\theta) + 2 }{3} - cos (\theta) \right )\)

\(R^3\cdot \pi \cdot \left (\dfrac{cos^3 (\theta) }{3} + \dfrac{2}{3} - cos (\theta) \right )\)

Therefore, the correct option is πR³(2/3 + (1/3)cos³θ - cosθ).

Newton first law state that anything in motion or rest will remain in motion or in rest until an external force is applied

Newton third law of motion state that every action have equal and opposite reaction

Answer:

Newton's laws of motion relate an object's motion to the forces acting on it. In the first law, an object will not change its motion unless a force acts on it. ... In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

Explanation:

mark me brain list please

Answer:

(a) η = 0.1742 = 17.42 %

(b) W = 31.64 W

(c) m = 0.58 kg

Explanation:

(a)

The efficiency of a Carnot's engine is given as follows:

\(\eta = 1-\frac{T_2}{T_1}\)

where,

η = efficiency = ?

T₁ = source temperature = 100°C + 273 = 373 K

T₂ = sink temperature = 35°C + 273 = 308 K

Therefore,

\(\eta = 1 - \frac{308\ k}{373\ k} \\\)

η = 0.1742 = 17.42 %

(b)

Another formula for the efficiency of Carnot's Engine is:

\(\eta = 1 - \frac{Q_2}{Q_1}\)

where,

Q₁ = Input heat rate

Q₂ = Heat rejected = 150 W

Therefore,

\(0.1742 = 1 - \frac{150\ W}{Q_1}\\\\ \frac{150\ W}{Q_1} = 1-0.1742\\\\Q_1 = \frac{150\ W}{0.8258}\)

Q₁ = 181.64 W

Now, for the useful power output:

\(W = Q_1-Q_2\\W = 181.64\ W - 150\ W\\W = 31.64\ W\)

where,

W = Useful Output

W = 31.64 W

(c)

The heat required to condense steam i given as:

\(Q = mH\\Q_1t=mH\\m = \frac{Q_1t}{H}\)

where,

m = mass of steam condensed = ?

t = time = 2 h = 7200 s

H = Latent heat of condensation of steam = 2260 KJ/kg = 2260000 J/kg

Therefore,

\(m = \frac{(181.64\ W)(7200\ s)}{(2260000\ J/kg)}\)

m = 0.58 kg

Answer:

I think you are looking for the velocity, so the answer is 38.5 m/s

Explanation:

Velocity is giving by displacement/time. North will be positive and South will be negative, George travels 750 meters then travels -250 meters his displacement is then 750 - 250 or 500 meters. Divide that by 13 seconds to get 38.5 m/s.

Answer:

speed

Explanation:

according to your question, your answer is speed

The electric field strength is 62.5 N/C.

Electric field strength (E) is a physical quantity that describes the intensity of the electric field at a particular point in space.

The electric field strength (E) can be calculated using the formula:

E = F/q

Where

Substituting the given values, we get:

E = 5.0 N/0.08 C

E = 62.5 N/C

Therefore, the electric field strength is 62.5 N/C.

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RS is a composition of rotation and reflection in the Euclidean plane E². The precise description of RS depends on the specific properties of the rotation R and reflection S.

In general, if R and S have the same axis or line of symmetry, the composition RS results in a translation. If R and S have intersecting lines of symmetry, RS yields a glide reflection. If R and S have perpendicular lines of symmetry, RS produces a rotation.

It is important to consider special cases, such as parallel lines of symmetry, coinciding axes, or perpendicular lines of reflection, as they may lead to different outcomes. The classification of isometries in E² involves understanding how rotations and reflections combine to create different transformations in the plane.

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The value of the mean of all values of d (Hd) is -0.04.

As per data the following temperatures,

Temperature (°F) at 8 AM 98.3

Temperature (°F) at 12 AM 99.1 98.8 99.2 97.1 97.4 97.8 97.2

Temperature (F) at 8 AM 99.3 98.8 97.6 97.7 97.1

Temperature (°F) at 12 AM 99.1 99.2 97.8 972 97.4

Let the temperature at 8 AM be the first sample, and the temperature at 12 AM be the second sample. Then,

d = x₂ - x₁

Now, we need to find the values of d for all five subjects.

Therefore, d is as follows:

d₁ = 99.3 - 99.1

   = 0.2

d₂ = 98.8 - 99.2

    = -0.4

d₃ = 97.6 - 97.8

    = -0.2

d₄ = 97.7 - 97.2

   = 0.5

d₅ = 97.1 - 97.4

    = -0.3

In general, Hd represents the mean of all values of d.

Thus, the value of Hd is:

Hd = (0.2 + -0.4 + -0.2 + 0.5 + -0.3) / 5

     = -0.04

Thus, the value of Hd is -0.04.

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Here are the hypothetical observations that would contradict the current understanding of white dwarfs:
1. A white dwarf with a mass larger than the Chandrasekhar limit

2. A white dwarf with a size larger than Earth

3. A white dwarf with ongoing nuclear fusion

1. A white dwarf with a mass larger than the Chandrasekhar limit: The Chandrasekhar limit is the maximum mass a white dwarf can have before it undergoes a catastrophic collapse and explodes in a supernova. If we observe a white dwarf with a mass exceeding this limit, it would contradict our current understanding.

2. A white dwarf with a size larger than Earth: White dwarfs are known to be extremely compact, with a size similar to Earth. If we observe a white dwarf that is significantly larger than Earth, it would contradict our current understanding.

3. A white dwarf with ongoing nuclear fusion: White dwarfs are stellar remnants that have exhausted their nuclear fuel, so they do not undergo nuclear fusion anymore. If we observe a white dwarf that is still undergoing nuclear fusion, it would contradict our current understanding.

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