Suppose a computer technical support representative can answer calls from 6 customers in an hour. what is the probability that a customer will be on hold less than 30 minutes?

The flow of water from Northern California has a temperature of approximately 5°C and a viscosity (kinematics) of 0.8926 m2/s traveling at 8 knots. On the Pacific coast of the Baja California peninsula, the water temperature is 15°C, its viscosity (kinematics) is 1.1386 with a speed of 16 knots.

The length it travels is 1000 km, what type of fluid do we have on both coasts?To determine the type of fluid that we have on both coasts, we need to calculate the Reynolds number (Re).The Reynolds number is used to predict flow patterns in different fluid flow situations. It is defined as the ratio of the inertial forces to the viscous forces and consequently is used to identify the type of flow. The Reynolds number can be used for a variety of flow scenarios including, liquid to gas, liquid to liquid, and gas to gas.

To calculate the Reynolds number, we need the following formula: Re = (Velocity)(Length) / ViscositySubstituting the given values in the equation;For the water from Northern CaliforniaRe= (8 knots x 1000 km) x 1000 m/km / 0.8926 m2/s= 89,728,387.60Re = 8.9 x 107For the water from the Pacific coast of the Baja California peninsula,Re= (16 knots x 1000 km) x 1000 m/km / 1.1386 m2/s= 14,033,487.51Re = 1.4 x 107From the given Reynolds numbers calculated above, the fluid on both coasts of California is in turbulent flow because the Reynolds number is greater than 4000.The correct option is Turbulent fluid >4000.

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No-till farming is an appropriate solution for the problem of the depletion of organic matter in the soil on a farm. The appropriate option is B) II only.

No-till farming is a technique of planting crops without disrupting the soil through tillage. In other words, this farming technique involves planting seeds without plowing or tilling the soil. The no-till method is meant to maintain the soil's moisture and organic matter by avoiding any disturbance to its organic composition. It is a technique of growing crops from year to year without disturbing the soil's organic matter content. In this method, the seeds are directly planted into the soil, which helps in increasing soil health and reducing soil erosion and runoff.

When the soil is not able to maintain its organic composition and loses nutrients as a result of being unable to regenerate them at a sufficient pace, soil depletion occurs. Soil depletion occurs when soil nutrients are removed more quickly than they can be replenished, resulting in a lack of nutrients in the soil. The organic matter of the soil is depleted in many farming techniques that use tilling and leaving soil bare.

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The resistance of the 10 km long copper wire with a diameter of 4mm is 0.1336 Ω.

The resistance of a 10 km long copper wire with a diameter of 4mm can be calculated using the formula R = ρL/A, where R is the resistance, ρ is the resistivity of the material, L is the length of the wire, and A is the cross-sectional area of the wire. The resistivity of copper is 1.68 x 10^-8 Ωm, the length of the wire is 10,000 m, and the cross-sectional area can be calculated using the formula A = πr^2, where r is the radius of the wire.

The radius of the wire is 0.002 m (half of the diameter), so the cross-sectional area is π(0.002)^2 = 1.2566 x 10^-5 m^2. Plugging these values into the formula for resistance gives:

R = (1.68 x 10^-8 Ωm)(10,000 m)/(1.2566 x 10^-5 m^2) = 0.1336 Ω

Therefore, the resistance of the 10 km long copper wire with a diameter of 4mm is 0.1336 Ω.

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The average speed of the sea floor expansion during this time has been approximately 8.03 x \(10^{-7\) meters per second.

The sea floor expansion can be calculated using the age of the oldest rocks and the width of the strip. In this case, the oldest rocks are 750,000 years old, and the strip is 19 km wide. To find the average speed of expansion, we need to divide the width of the strip by the age of the rocks.

Average speed of sea floor expansion = (Width of the strip) / (Age of the oldest rocks)

Average speed = (19 km) / (750,000 years)

To convert years to seconds, multiply by the number of seconds in a year (365.25 days/year * 24 hours/day * 60 minutes/hour * 60 seconds/minute):

750,000 years * 365.25 * 24 * 60 * 60 = 23,652,060,000 seconds

Now, divide the width of the strip by the age of the rocks in seconds:

Average speed = (19,000 meters) / (23,652,060,000 seconds)

Average speed ≈ 8.03 x \(10^{-7\) meters/second

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-- burn it   (it combines with Oxygen and makes new substances)

-- chew it   (it combines with your saliva and makes new substances)

-- swallow it   (your stomach juices dissolve it and make new substances)

I think that's as far as I should go with it.

Sound travels slowest through water at 80°C. Option d is correct choice.

Sound is a form of energy that travels through a medium in the form of pressure waves. In water, these pressure waves propagate through the movement of water molecules. As the temperature of water increases, the speed of sound through it also increases because the kinetic energy of the water molecules increases.

As the temperature of water increases, its molecules gain energy and vibrate more rapidly, which causes sound waves to propagate faster through the water. At lower temperatures, such as 20°C, the molecules move more slowly and sound waves propagate more slowly through the water. Hence, option d is correct choice.

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ANSWER:

a. 1200 lb/ft^3

b. Gold

STEP-BY-STEP EXPLANATION:

Given:

Weight (W) = 96 lb

Volume (V) = 0.08 ft^3

a.

Weight density is equal to the quotient of weight to volume, therefore:

b.

We can say that this weight density is equal to the weight density of Gold

Answer:

W = 66 J

Explanation:

Given that,

The weight of the box, W = 44 N

It is placed on a shelf that is 1.5 m above the ground.

We need to find the work done in lifting the box.

We know that,

Work done, W = Fd

So,

W = 44 N × 1.5 m

= 66 J

So, the required work done is equal to 66 J.

After 1 hour, 80 g decays to 40 g.

After another hour (total 2 hours), 40 g decays to 20 g.

After another hour (total 3), 20 g decays to 10 g.

After one more hour (total 4), 10 g decays to (D) 5 g.

The winding density of the solenoid is approximately 1881 turns per meter.

To calculate the winding density of the solenoid, we need to determine the total number of turns in the solenoid per unit length.

The energy stored in a solenoid can be expressed as:

    E = (1/2) * μ₀ * n² * A * I² * L,

where:

      n² = (2E) / (μ₀ * A * I² * L)

      n = √((2E) / (μ₀ * A * I² * L))

n = √((2 * 6.00 × 10⁻⁶ J) / (4π × 10⁻⁷ T·m/A * π * (0.050 m)² * (0.400 A)²

* 0.700 m))

       n = √((2 * 6.00 × 10⁻⁶) / (4π × 10⁻⁷ * 0.050² * 0.400² * 0.700))

         n ≈ 1881  turns/m

Therefore, the winding density of the solenoid is approximately 1881  turns per meter.

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To determine the charge, we can use the equation for the electric field due to a point charge:

E = k * q / r^2

Where E is the electric field, k is the Coulomb constant (8.98755 x 10^9 Nm^2/C^2), q is the charge, and r is the distance from the point charge.

We can rearrange this equation to solve for q:

q = E * r^2 / k

Plugging in the given values:

q = (68.3 N/C) * (28.8 m)^2 / (8.98755 x 10^9 Nm^2/C^2)

q = (68.3 N/C) * (826.24 m^2) / (8.98755 x 10^9 Nm^2/C^2)

q = (68.3 N/C) * (826.24 m^2/C^2)

q = (68.3 N/C) * (826.24 / 8.98755 x 10^9) C

q = (68.3 N/C) * (9.26 x 10^-9) C

q = 6.36 x 10^-7 C

The charge is approximately 6.36 x 10^-7 Coulombs.

Answer:

when their is heat, because thermal uses heat to generate energy

The Doppler method can be used to estimate the average orbital distance of a planet's orbit by measuring the time it takes for the star's line-of-sight velocity to cycle from peak to peak, and using Newton's version of Kepler's third law. Option c) is correct .

If a planet orbits a star, both of them revolve around their mutual center-of-mass. This center-of-mass is very close to the star's center since stars are much more massive than planets. As a result, if the star and planet orbit each other, they appear to move in small circles or ellipses around a fixed point.In the Doppler method, astronomers observe the motion of a star, which can reveal the presence of an exoplanet.

When a planet orbits a star, the star moves slightly as a result of the gravitational tug of the planet. This motion causes the star's spectrum to shift slightly towards longer wavelengths (redshift) and shorter wavelengths (blueshift) as the star moves away from and towards us respectively. The size of this shift depends on the mass of the planet and its orbital distance from the star.

By measuring the size of these shifts, astronomers can infer the presence of an exoplanet and estimate its mass and orbital distance. Hence option c) Is correct ,

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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:

True

Explanation:

The nucleus contains all of the mass of the atom. Almost all of the mass of the atoms is made up of protons and neutrons.

Answer:

both the neutrons and protons are located in the nucleus of an atom.

Answer:

Multiply the length, width and height of the brick to calculate its volume.

Explanation:

To find the volume of a rectangular brick, you need to multiply its length, width, and height.

The rectangular brick is 400 cubic centimeters (cm³).

The formula to calculate the volume of a rectangular prism (which includes a rectangular brick) is:

\(\[ \text{Volume} = \text{Length} \times \text{Width} \times \text{Height} \]\)

Let's assume the length of the rectangular brick is 10 cm, the width is 5 cm, and the height is 8 cm. Plugging these values into the formula, we get:

\(\[ \text{Volume} = 10 \, \text{cm} \times 5 \, \text{cm} \times 8 \, \text{cm} \]\)

Now we can calculate the volume:

\(\[ \text{Volume} = 400 \, \text{cm}^3 \]\)

Therefore, the volume of the rectangular brick is 400 cubic centimeters (cm³).

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The speed of the cars after the collision is approximately 19.47 m/s.

To determine the speed of the cars after the collision, we need to apply the principle of conservation of momentum.

The momentum of an object is given by the product of its mass and velocity: momentum = mass × velocity.

Given:

Mass of the first car (m₁) = 1500 kg

Velocity of the first car (v₁) = 90 km/h toward the east

Mass of the second car (m₂) = 3000 kg

Velocity of the second car (v₂) = 60 km/h toward the south

To use the principle of conservation of momentum, we need to convert the velocities to a common unit. Let's convert them to m/s.

Converting velocities:

v₁ = 90 km/h = (90 × 1000) / 3600 = 25 m/s (eastward)

v2 = 60 km/h = (60 × 1000) / 3600 = 16.7 m/s (southward)

The total momentum before the collision is equal to the total momentum after the collision, as momentum is conserved.

Total momentum before collision = Total momentum after collision

(m₁ × v₁) + (m₂ × v₂) = Total mass × Final velocity

(1500 kg × 25 m/s) + (3000 kg × 16.7 m/s) = (1500 kg + 3000 kg) × Final velocity

Simplifying the equation:

37500 kg·m/s + 50100 kg·m/s = 4500 kg × Final velocity

87600 kg·m/s = 4500 kg × Final velocity

Dividing both sides by 4500 kg:

Final velocity = 87600 kg·m/s / 4500 kg

Final velocity ≈ 19.47 m/s

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The ecologist was comparing the density of white-tailed deer, Odocoileus virginianus, between two woodlots.

A population's density is calculated as the number of people in a given area or volume. It is a key parameter for comprehending the dynamics of populations and one of the most fundamental ideas in population ecology.

The number of people per unit area, such as per square meter or per square kilometer, is a common way to represent population density in the context of ecology. As an illustration, it is possible to compute the density of a certain species in a particular habitat by counting the number of individuals inside a given area and dividing that number by the area.

The dynamics of the population are significantly influenced by density. Increased resource competition brought on by a high population density may have an impact on population growth, survival, and reproduction. A low population density, on the other hand, may lead to less competition for resources and more food availability, which may encourage human growth and reproduction.

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Because ultraviolet light may be absorbed by the filler substance, but not by the lamp's light. Because UV light extracts energy from the filler substance while lamp light does not.

Ultraviolet Rays in the electromagnetic Spectrum Ultraviolet rays are a kind of electromagnetic radiation that extends from the visible light spectrum to the X-ray area.

Harmful rays have a long-term effect on humans, causing skin and eye problems. It is also a source of Vitamin C.

Because ultraviolet light may be absorbed by the filler substance, but not by the lamp's light. Because UV light extracts energy from the filler substance while lamp light does not,

Hence light from the ultraviolet flashlight harden the filling when light from the lamp does not.

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To calculate the density, specific weight, and specific gravity of the oil in the cylindrical can, we'll use the following formulas:

Density (ρ) = Mass (m) / Volume (V)

Specific weight (γ) = Weight (W) / Volume (V)

Specific gravity (SG) = Density of substance / Density of reference substance

1. Density (ρ) = Mass (m) / Volume (V)

ρ = \(2.5 kg / 0.001419 ^3\)

ρ ≈ 1760.07 kg/m³

Therefore, the density of the oil is approximately 1760.07 kg/m³.

2. Specific weight (γ) = Weight (W) / Volume (V)

Weight (W) = Mass (m) × Acceleration due to gravity (g)

W = 2.5 kg × 9.8 m/s²

W ≈ 24.5 N

γ = \(24.5 N / 0.001419 m^3\)

γ ≈ 17248.54 N/m³

Therefore, the specific weight of the oil is approximately 17248.54 N/m³.

3. Specific gravity (SG) = Density of substance / Density of reference substance

In this case, the reference substance is usually water with a density of 1000 kg/m³.

SG = \(1760.07 kg/m^3 / 1000 kg/m^3\)

SG ≈ 1.76

Therefore, the specific gravity of the oil is approximately 1.76.

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Answer:

One example of a fixed pulley is a Flag Pole

Explanation:

A good example of a fixed pulley is a flag pole: When you pull down on the rope, the direction of force is redirected by the pulley, and you raise the flag. Other examples of movable pulleys include construction cranes, modern elevators, and some types of weight lifting machines at the gym.

Answer:

A positive charge placed in an electric field will tend to move in the direction of the electric field lines and a negative charge will tend to move opposite to the direction of the electric field lines.

One way to remember this is that there is one velocity, and so the thumb represents it. There are many field lines, and so the fingers represent them. The force is in the direction you would push with your palm. The force on a negative charge is in exactly the opposite direction to that on a positive charge.

Explanation:

Answer:

The force of the negative particle direction is East.

Answer:

The normal force 630.4 N

Explanation:

Given:

m = 57.0 kg

a = 1.25 m/s²

g = 9.81 m/s²

___________

N - ?

Since the elevator is moving with acceleration UP, the reaction of the support:

N = m· (g + a)

N = 57.0·(9.81 + 1.25) ≈ 630.4 N

Answer:

2

Explanation:

Elements are one of the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means and made up of atoms all having the same number of protons.

Elements are made up of identical atoms. It is generally said that the atoms that make up an element are the same and different from atoms of other elements.

Compounds, on the other hand, are substances formed by chemical bonding of two or more elements in definite proportions by weight.

Examples of elements are Calcium, Pottasium, Neon, Rubidium, Hydrogen etc. These elements contain atoms that are identical. Chemical elements on the periodic table are about 118 in number arranged in accordance with their atomic number.

When two or more elements chemically combine, they for chemical compounds. Examples are carbondioxide, water, ethane, ethanol etc.

Majority of the elements are metallic, meaning that they have characteristics such as shiny appearance, good conductors of heat and electricity etc.

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The true of an image produced by this mirror will be 2.5 times smaller and virtual. Option C is correct.

When light beams from an object reflect off a mirror, they intersect with the picture of that thing called an image. Real and virtual images are the two sorts of images.

The ratio of xi to xo for a certain mirror is 2.5;

\(\rm \frac{x_i}{x_0} =2.5 \\\ x_i=2.5 x_0\)

Where,

\(\rm x_0\) is the true of an image produced by this mirror.

The true of an image produced by this mirror will be 2.5 times smaller and virtual.

Hence,option C is correct.

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If the depth of the ocean at a particular place is 1817.5m, the time it would take a sonar signal to travel from a ship to the ocean bottom and back again would depend on the speed of sound in seawater.

The speed of sound in seawater at a temperature of 15°C (59°F) is around 1,530 meters per second. Therefore, to find the time it would take for the sonar signal to travel from the ship to the ocean bottom and back again, we can use the formula: Time = (2 x Depth) / Speed of Sound.

As we know that the depth of the ocean at a particular place is 1817.5 meters. Therefore, we can find out the time it would take for the sonar signal to travel from the ship to the ocean bottom and back again by substituting these values into the formula:

Time = (2 x Depth) / Speed of Sound Time = (2 x 1817.5) / 1530Time = 2.38 seconds.

Therefore, it would take approximately 2.38 seconds for a sonar signal to travel from a ship to the ocean bottom and back again at that particular location in the ocean. It's important to note that this is just an estimate and the actual time may vary depending on factors such as the temperature, pressure, and salinity of the seawater.

The time it would take for a sonar signal to travel from a ship to the ocean bottom and back again would depend on the depth of the ocean and the speed of sound in seawater. Using the formula Time = (2 x Depth) / Speed of Sound, we can estimate the time it would take for the sonar signal to travel based on these factors. In this case, the depth of the ocean was 1817.5 meters and the speed of sound in seawater was 1530 meters per second, so the estimated time it would take for the sonar signal to travel was 2.38 seconds.

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Answer:

1. the attractive force that holds atoms or ions together

2. the average distance between the nucleus of two bonded atoms

3. the angle formed by two bonds to the same atom

Answer:

133m/s

Explanation:

b/c 250÷2.2÷0.85=133

→ Mass is measured in(unit)

→ The tool which is commonly used

nd many more......

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Answer:

→ Mass is measured in(unit)

kilogram (kg) nd

smaller mass in gram(g)

→ The tool which is commonly used

triple beam balance

electronic balance

weighing machine

Explanation: