If you have two convex lenses with different focal lengths, which has the larger magnification?

Answer:

\(V_{2.2} =2.2V\)

Fast and loose: that's a classic voltage divider. the drop from the i-th resistor is \(R_i \over {\sum R}\) of the drop across the whole series. In our situation, it's \(2.2\cdot 10^3 \over {2.2\cdot10^3 + 6.8\cdot 10^3\) of 9 V. By plugging numbers in a calculator, it's 22/90 of 9V, or 2.2V

With Ohm's Law

The series is equivalent of a single resistor of Resistance \(2.2\cdot 10^3+6.8\cdot 10^3 \Omega = 9.0 k\Omega\). By Ohm's first Law (\(V=Ri\)) the current flowing through the resistor is \(9V = 9*10^3\Omega i \rightarrow i=1mA\). At this point, the drop across the first resistor is, again by Ohm's law\(V = 2.2 \cdot 10^3 \Omega \cdot 1\cdot 10^{-3} A = 2.2V\)

Answer:

C. nuclear to electrical

Answer:

c its c noob

Explanation:

Option C: 0.115 is the correct option.

The correct error between the thread plug gauge pitch diameter and the micrometer measurement is 0.115 mm.

Explanation:

In order to determine the correct error between the thread plug gauge pitch diameter and the micrometer measurement, we first need to calculate the difference between the two.

This will give us the error.

The formula we will use is:

Error = |Pitch Diameter - Micrometer Measurement|

Given that:

             Pitch Diameter = 22.35 mm

             Micrometer Measurement = 22.235 mm

Substituting the values, we get:

              Error = |22.35 - 22.235|

              Error = 0.115 mm

Therefore, the correct error is 0.115 mm.

Option C: 0.115 is the correct option. The correct error between the thread plug gauge pitch diameter and the micrometer measurement is 0.115 mm.

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Answer:

They store floodwater

Explanation:

Answer: 2934.75 Joules

Explanation:

Potential energy can be defined as energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

P.E = mgh

Where P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per second square.

h represents the height measured in meters.

Given the following data;

Weight =645

Height = 4.55

P.E = mgh

But we know that weight = mg = 645N

Substituting into the equation, we have;

P.E = 645 • 4.55

P.E = 2934.75J

Potential energy, P.E = 2934.75 Joules.

Answer: Gases

Explanation: Gases don't have a certain direction, so they go in all directions.

The equivalent capacitance of the circuit​ is Ceq = 1.2 uf

The ability of an element or circuits to receive and hold fuel inside the form of an electric charge is known as capacitance. Devices that retain energy comprise capacitors, which are available in a variety of sizes and forms.

let the capacitors are connected in series combination then-

the equivalent capacitance

1 / C1 + 1 / C2 + 1 / C3 + 1 / C4 = Ceq^-1

Ceq^-1 = (1/3 + 1/6 + 1/4 + 1)/12

Ceq^-1 = 4+2+3+1/12

Ceq^-1 = 10/12

Ceq = 12/10

Ceq = 1.2 uf

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Answer:

Correct Answer: Option B

Explanation:

Explanation

P1/T1 = P2/T2

80/(273+47) = P1/(273+27) = 75Nm-2

Answer: 75.0 Nm^-2

Explanation:

P1/T1 = P2/T2 80/(273+47) = P1/(273+27) = 75Nm-2

Answer:

9.Refraction

13.refractive index is the ratio of velocity of light in a vacuum to it's velocity I. a specified medium.

12.dispersion

14.Orange with a wavelength of about 585-620

I have no idea of number 10

The spacecraft's interplanetary velocity with respect to the Sun when arriving near Mars is approximately 24,130 m/s.

To calculate the spacecraft's interplanetary velocity with respect to the Sun when arriving near Mars, given the semi-major axis (a) of 199,100,000 km and the eccentricity (e) of 0.2095, follow these steps:

1. Convert the semi-major axis from km to meters: a = 199,100,000 km * 1,000 = 199,100,000,000 meters
2. Calculate the semi-minor axis (b) using the eccentricity: b = a * sqrt(1 - e^2) = 199,100,000,000 * sqrt(1 - 0.2095^2) ≈ 188,763,068,160 meters
3. Calculate the specific orbital energy (ε) using the formula:
ε = -GM / (2a), where G is the gravitational constant (6.67430 × 10^-11 m^3 kg^-1 s^-2) and
M is the mass of the Sun (1.989 × 10^30 kg):
ε = - (6.67430 × 10^-11 * 1.989 × 10^30) / (2 * 199,100,000,000) ≈ -2.216 × 10^7 J/kg
4. Calculate the spacecraft's interplanetary velocity (v) with respect to the Sun at Mars' distance (r) using the formula:
v = sqrt(2 * (ε + GM / r)).

Assume the distance from the Sun to Mars is equal to the semi-major axis (a):
v = sqrt(2 * (-2.216 × 10^7 + (6.67430 × 10^-11 * 1.989 × 10^30) / 199,100,000,000)) ≈ 24,130 m/s

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The average speed of the dog is  6.8 m/s  while the average velocity is 6.8 m/s halfway to the starting point.

The speed of a moving object is the ratio of the distance covered by the object and the time taken to cover the distance. The average speed is the ratio of the total distance traveled and the total time taken.

Velocity, on the other hand, refers to the speed in a particular direction. In other words, velocity is a vector quantity while speed is a scalar quantity.

In this case:

Total distance covered = 50 + 25

                                       = 75 meters

Total time taken = 7.2 + 3.85

                           = 11.05 seconds

Average speed = 75/11.05

                          = 6.8 m/s

Average velocity = 6.8 m/s halfway

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An emf source with a resistor and a capacitor are connected in series. as the capacitor charges, when the current in the resistor is 0.900 a. The magnitude of the charge on each plate of the capacitor will be: 0.900 A * t.

When an emf source with a resistor and a capacitor are connected in series, the current in the resistor will start decreasing as the capacitor charges up. When the current in the resistor is 0.900 A, the magnitude of the charge on each plate of the capacitor can be determined by the equation:

Q = I * t
where Q is the magnitude of the charge, I is current, and t is the time.

In this case, since the current is 0.900 A, the magnitude of the charge on each plate of the capacitor can be calculated by multiplying the current (0.900 A) by the time (t). The magnitude of the charge on each plate of the capacitor will therefore be 0.900 A * t.

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Waves with high amplitude transport the greatest amount of energy as the amplitude directly correlates with the energy carried by the wave.

The type of waves that transports the greatest amount of energy is waves with high amplitude. Amplitude refers to the maximum displacement or height of a wave from its equilibrium position. It is a measure of the energy carried by a wave. The higher the amplitude of a wave, the greater its energy.Waves with high amplitude have more energy because they have larger displacements, resulting in a greater transfer of energy. This is evident in various wave phenomena. For example, in the case of sound waves, waves with high amplitudes correspond to louder sounds, indicating a greater energy transfer. Similarly, in the case of ocean waves, high-amplitude waves can be more powerful and destructive.On the other hand, the other factors mentioned—frequency, wavelength, and medium—are not directly related to the amount of energy carried by a wave. Frequency refers to the number of wave cycles occurring in a given time, wavelength is the distance between two corresponding points on a wave, and the medium is the material through which the wave propagates. While these factors can affect the characteristics of a wave, they do not determine the overall energy content.

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Explanation:

The relationship among u, v, and f in the context of a lens can be described by the lens formula:

1/v - 1/u = 1/f

where:

- u is the object distance (distance between the object and the optical center of the lens),

- v is the image distance (distance between the image and the optical center of the lens), and

- f is the focal length of the lens.

According to the lens formula, the reciprocal of the image distance subtracted from the reciprocal of the object distance is equal to the reciprocal of the focal length.

2A  is the current (in amps) through the hole

Define electric current

An electric current is the movement of charged particles through a conductor or a vacuum, such as electrons or ions. It is referred to be the overall pace at which electric charge moves through a surface.

Electric current describes both how much electricity is going through a circuit and how it is flowing in an electronic circuit. It is expressed in amps (A). More electricity is flowing in the circuit when the amperage value is higher.

Charge, also known as electric charge, electrical charge, or electrostatic charge, is a property of a unit of matter that expresses how many more or fewer electrons than protons it possesses. It is denoted by the sign q.

I ⇒ dQ/dt

Q⇒12C

t ⇒ 6sec

I ⇒ 12/6 ⇒2A

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The current flowing through the hole is 2 amps. It's important to note that electric current is the rate of flow of charge, so the amount of charge passing through a point in a circuit per unit of time determines the current.

The flow of electric charge through a circuit is known as electric current. The standard unit for measuring an electric current is the ampere (A), which is defined as the flow of one coulomb of charge per second. In this problem, we are given that a collection of molecules with a charge of 12 coulombs passes through a hole in 6 seconds.

To calculate the current (in amps) through the hole, we need to use the formula:

Current = Charge / Time

In this case, the charge is 12 coulombs and the time is 6 seconds, so we can plug in the values:

Current = 12 coulombs / 6 seconds = 2 amps

This calculation demonstrates how the amount of charge and time taken for that charge to pass through a point in a circuit can be used to calculate the current.

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Answer:

a = (V2 - V1) / t     for uniform acceleration

a = (15 - 5) / 2 = 5 m/s^2      (Number A)

The 40-N collar  can slide on a frictionless vertical rod and is attached as shown to a spring. The spring is unstretched when h=300mm. Knowing that the constant of the spring is 560(N)/(m),  the value of h for which the system is in equilibrium is approximately 0.2286 meters.

To determine the value of h for which the system is in equilibrium, we need to consider the forces acting on collar A and set the net force to zero.

Let's analyze the forces acting on collar A:

   Weight (W): The weight acts vertically downward and has a magnitude of 40 N.

   Spring force (F_s): The spring force acts in the opposite direction to the displacement of the spring from its equilibrium position. It is given by Hooke's law: F_s = -kΔh, where k is the spring constant and Δh is the displacement from the equilibrium position.

Since the system is in equilibrium, the net force acting on the collar A must be zero

Net force = F_s - W = 0.

Substituting the values:

-560Δh - 40 = 0.

Simplifying the equation:

-560Δh = 40.

Solving for Δh:

Δh = 40 / (-560).

Δh = -0.0714 m.

Now, to determine the value of h for which the system is in equilibrium, we need to add Δh to the equilibrium position (h = 300 mm = 0.3 m).

h = 0.3 + Δh.

h = 0.3 - 0.0714.

h = 0.2286 m.

Therefore, the value of h for which the system is in equilibrium is approximately 0.2286 meters.

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The moon orbiting the earth and Gravity pulls skydiver down towards the surface of the earth from an airplane are examples of a non-contact force

Non-contact forces are forces that act between two objects that are not physically touching each other.

That means that there is no contact but there exist force between them .The moon orbiting the earth due to gravitational force between both the bodies , this is a non contact force . Because moon is in not in contact with the earth , still both the bodies are exerting force on each other

Also Gravity pulls skydiver down towards the surface of the earth from an airplane is also an example of non contact force because there is no contact between skydiver and earth , still due to earth's gravitational force , it is been attracted towards the ground

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If the flow is laminar, alpha = 1.0. The alpha factor in the pipe flow energy equation, also known as the Darcy-Weisbach friction factor, accounts for the frictional losses due to fluid viscosity and turbulence in the pipe. Here option D is the correct answer.

The "alpha" factor in the pipe flow energy equation accounts for the velocity profile across the pipe. It is defined as the ratio of the average velocity to the maximum velocity in the flow, and its value depends on whether the flow is laminar or turbulent.

For laminar flow, the value of alpha is 1.0, while for turbulent flow, the value of alpha is approximately 1.05. This is because the velocity profile for turbulent flow is flatter than for laminar flow, resulting in a slightly smaller alpha value.

It is worth noting that the "alpha" factor does not account for variable density. This is taken into account by the Reynolds number, which is a dimensionless quantity that characterizes the flow regime and is defined as the ratio of inertial forces to viscous forces.

Complete question:

Which of the following is true about the "alpha" factor that is in front of the velocity terms in the pipe flow energy equation?

Alpha accounts for the velocity profile across the pipe.

A - If the flow is laminar, alpha = 2.0.

B - If the flow is turbulent, alpha = 1.05.

C - If the flow is turbulent, alpha = 2.0.

D - If the flow is laminar, alpha = 1.0.

Alpha accounts for variable density.

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Answer:

 U = 2,195 10⁵ J

Explanation:

The potential energy is

      U = m g and

in this case each person has a mass of 75 kg and the elevator has a mass of 500 kg, the total mass is

 m_total = m_elevator + 4 m_person

      m_total = 500 + 4 75

      m_toal = 800 kg

let's calculate

       U = 800 9.8 28

       U = 2,195 10⁵ J

The diameter of the aorta can be determined by using the given velocity and flow rate. The velocity in branch arteries can be calculated using the given flow rate and the total area of the arteries. The first branch off the aorta can be identified based on its location. The valve area can be determined by utilizing the given velocities and the area of the LVOT.

To calculate the diameter of the aorta, we need to relate the velocity and the flow rate. Velocity is given as 33 cm/sec, and the flow rate is 4.4 L/min. We can convert the flow rate to cm^3/sec (1 L = 1000 cm^3), which gives us a flow rate of 73.33 cm^3/sec. The flow rate is proportional to the cross-sectional area of the vessel multiplied by its velocity. Using the formula Q = A * V, where Q is the flow rate, A is the cross-sectional area, and V is the velocity, we can rearrange the formula to solve for the diameter of the aorta.

To determine the velocity in each branch artery, we can use the given flow rate of 5.1 L/min and the total area of the branch arteries, which is 50 cm^2. By dividing the flow rate by the total area, we can find the velocity in the branch arteries.

Identifying the first branch off the aorta requires knowledge of the anatomy. Typically, the first branch off the aorta is the brachiocephalic trunk, which divides into the right subclavian artery and the right common carotid artery.

To calculate the valve area, we can utilize the velocities and the area of the left ventricular outflow tract (LVOT). The velocity in the aortic valve is given as 4.4 m/sec, and the velocity in the LVOT is 88 cm/sec. The valve area can be determined using the continuity equation, which states that the product of the cross-sectional area and velocity at one point is equal to the product of the cross-sectional area and velocity at another point along the flow path.

In summary, the diameter of the aorta can be determined using the given velocity and flow rate. The velocity in branch arteries can be calculated using the flow rate and the total area of the arteries. The first branch off the aorta is typically the brachiocephalic trunk. The valve area can be calculated using the velocities and the area of the LVOT, utilizing the continuity equation.

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When Seth is struck in the cheek by the Slinky as it approaches its finish. Seth feels a surge of vitality. The medium carries the energy from Lana end to Seth end, where it started. The final particle on the cheek transfers.

A wave is an energetic disturbance in either a medium that doesn't include any net particle motion. Elastic deformation, a change in pressure, a magnetic or electrical intensity, an electric potential, or a change in temperature are a few examples.

Wind is the most frequent source of waves. The friction between the wind and the surface of the water produces wind-driven waves, also known as surface waves. A wave crest is produced when wind continuously disturbs the water's surface in an ocean or lake.

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Answer:

When metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms, forming ions. The resulting compound is called an ionic compound.

:

Many opera singers (and some pop singers) have a range of about 2.5 octaves or even greater. Suppose a soprano’s range extends from A below middle C (frequency 220 Hz) up to Eb -flat above high C (frequency 1244 Hz).  The length of the air column is L = 0.402 m or 40.2 cm.

To determine the length of the air column based on the given frequency range and assuming the lowest note as the fundamental, we can use the formula for the wavelength of a sound wave in a closed-open tube:

λ = 4L,

where λ is the wavelength and L is the length of the air column.

The speed of sound in air is given as v = 354 m/s.

Let's first calculate the wavelength of the lowest note, A below middle C (220 Hz):

λ1 = v / f1,

where f1 is the frequency of the lowest note.

λ1 = 354 m/s / 220 Hz.

Next, calculate the wavelength of the highest note, Eb-flat above high C (1244 Hz):

λ2 = v / f2,

where f2 is the frequency of the highest note.

λ2 = 354 m/s / 1244 Hz.

Since the lowest note corresponds to the fundamental frequency, we can set the length of the air column as one-fourth of the wavelength of the lowest note:

L = λ1 / 4.

Now, let's calculate the length of the air column:

L = (354 m/s / 220 Hz) / 4.

Therefore, the length of the air column is L = 0.402 m or 40.2 cm.

Considering the range of 2.5 octaves from A below middle C to Eb-flat above high C, the resulting length of the air column appears reasonable. It's important to note that this is a simplified model and the actual human vocal tract is more complex. Factors like vocal cord tension, shape of the vocal tract, and resonances in the body can also contribute to the range and quality of the singer's voice.

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The amount of force necessary to keep it submerged in water is F=0.258N.

The force required to hold a table tennis ball submerged in water is calculated using the formula:

\(F =\frac{ (\rho * V * g) }{ A}\)

Where F is the force, ρ is the water's density, V is the ball's volume, g is its gravitational acceleration, and A is its cross-sectional area.

The following formula is used to determine the ball's volume:

\(V = \frac{4}{3}*pi*r^3\)

where r is the ball's radius.

The radius of the ball is half its diameter, thus:

\(r = 3.8 cm^2\)

Therefore,

\(V = \frac{4}{3}*pi *(3.8 cm ^2)3\\V = 0.5222 cm3\)

The cross-sectional area of the ball is calculated using the formula:

\(A = \pi * r^2\\\\A = \pi* (\frac{3.8 cm }{ 2})^2\\A = 4.5257 cm^2\)

Substituting the values in the above formula,

\(F =\frac{ (0.084 g/cm^3 * 0.5222 cm^3 * 9.8 m/s^2) }{4.5257 cm^2}\\F = 0.258 N\)

Hence, the force needed to keep it submerged in water is 0.258N

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Answer:

Approximately \(4.50 \times 10^{11}\; {\rm s}\).

Explanation:

The speed of light is \(c \approx 3.00\times 10^{8}\; {\rm m\cdot s^{-1}}\).

Note that the standard unit of energy, joule, is a derived unit. In terms of the standard base units:

\(\begin{aligned}1\; {\rm J} &= (1\; {\rm N})\, (1\; {\rm m}) \\ &= (1\; {\rm kg \cdot m \cdot s^{-2}})\, (1\; {\rm m}) \\ &= 1\; {\rm kg \cdot m^{2} \cdot s^{-2}} \end{aligned}\).

Apply unit conversion and ensure that the unit of mass is in the standard unit kilogram (\({\rm kg}\)):

\(\begin{aligned} m &= 1\; {\rm g} \times \frac{1\; {\rm kg}}{10^{3}\; {\rm g}} &= 10^{-3}\; {\rm kg}\end{aligned}\).

Apply the equation \(E = m\, c^{2}\) to find the energy equivalent to \(m = 10^{-3}\; {\rm kg}\) of matter:

\(\begin{aligned}E &= m\, c^{2} \\ &= (10^{-3}\; {\rm kg})\, (3.00 \times 10^{8}\; {\rm m\cdot s^{-1}})^{2} \\ &= 9.00\times 10^{13}\; {\rm kg \cdot m^{2} \cdot s^{-2}} \\ &= 9.00\times 10^{13}\; {\rm J} \end{aligned}\).

Divide energy \(E\) by power \(P\) to find the duration \(t\) of the power consumption:

\(\begin{aligned} t &= \frac{E}{P} \\ &\approx \frac{9.00 \times 10^{13}\; {\rm J}}{200\; {\rm J \cdot s^{-1}}} \\ &= 4.50 \times 10^{11}\; {\rm s}\end{aligned}\).

In other words, the energy equivalent to \(1\; {\rm g}\) of matter could power this fridge for approximately \(4.50 \times 10^{11}\; {\rm s}\).

Out of 150 approved mortgage applications, a random sample may have variable or interest-only mortgages.

we are given that a random sample of 150 approved mortgage applications is either variable or interest-only mortgages. A variable mortgage, also known as an adjustable-rate mortgage (ARM), is a type of mortgage in which the interest rate fluctuates based on market conditions. An interest-only mortgage is a type of mortgage in which the borrower only pays interest on the loan for a certain period of time before beginning to make principal payments.To determine what percentage of the sample is variable or interest-only mortgages, we would need more information on the breakdown of the sample. However, we know that these are two different types of mortgages that borrowers can choose from when applying for a mortgage.

A home loan application is a report submitted to a bank when you apply for a home loan to buy land. The application is extensive and includes information about the borrower's employment history, financial situation, and the property being considered for purchase, among other things.

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Answer:

Given that the train which is heading north on the tracks takes 6 seconds to reach 60 miles per hour and completes the entire 60 mile trip in one hour, we can calculate the train's average speed and velocity over the one hour trip. Now right off the bat we know that the measurement we calculate for the train's average SPEED will be a scalar quantity as we are dealing with speed. On the other hand the measurement we calculate for the train's velocity will be a vector quantity as we are dealing with velocity and the quantity has both a magnitude and a direction. Now: we now that the train completed the entire 60 mile trip in one hour which means it is going 60 mph north, which is the velocity This velocity has both a magnitude (60 mph) and a direction (north). For the train's average speed we look at distance divided by time. The speed of the train is 60 miles per hour. The difference between speed and velocity is that speed is how fast an object is going with respect to a frame of reference versus velocity is a measure of the speed and direction of an object.

Answer:

High pressure.

Explanation:

The symbol H indicates high pressure, while the symbol L indicates low pressure. Therefore, option C is correct.

A weather map is a map of the world or a portion of it that uses symbols to depict the weather conditions at a given time, including temperature, pressure, wind speed and direction, humidity, clouds, visibility, and type and amount of precipitation.

Different kinds of weather maps are used by meteorologists to display forecasts. Satellite, Doppler radar, precipitation, temperature, and wind speed are the primary weather maps. Let's investigate each of these in greater depth. There are four types of weather maps and that is station model map, aviation map, temperature map, and streamline map.

The symbol H indicates high pressure. Therefore, option C is correct.

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The hand that holds the broomstick's top when you sweep is its fulcrum. The hand in the top of the broom serves as the pivot point, making it a lever.

The majority of brooms have the fulcrum inserted into the bristles at the base of the brush. The user can apply a reasonable amount of force without the broom tipping over or becoming unstable because this location has a good balance of leverage and stability.

A lever is a straightforward device with a rigid bar or board that rotates around the fulcrum, a fixed point.

Lever, Pulley, Wheel and Axle, Inclined Plane, Wedge, and Screw are the six classical simple machines.

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