50. What is the minimum coefficient of static friction necessary to keep the top block from slipping on the bottom block?A) 0.05B) 0.10C) 0.20D) 0.30E) 0.40

Answer:

be classless

I think im not sure

Explanation:

Answer:

$7.95

Explanation:

$5.75 cost per bag ÷ 47 apples = unit cost of $0.1223. thus, each apple cost $ .1223.

.1223 × 65 apples= $7.95

note_rounding apples to .12*65=$7.8

Answer:

  85.2 N

Explanation:

You want to know your weight if the Earth were 3 times as massive and had 5 times the present radius. Your weight is 710 N.

Your weight is proportional to the mass of the Earth and the square of the radius between your mass and the center of the Earth. The revised dimensions of the earth would multiply your weight by ...

  W = k(M/r²) = 710 N

  W' = k((3M)/(5r)²) = k(M/r²)(3/25) = (710 N)(3/25) = 82.5 N

Your weight would be 82.5 N.

The weight of a 1 in x 1 in steel bar if it were 27 in long would be 7.64 lbs.

Density of steel is approximately = 0.283 lbs/in³

Dimensions of steel bar is= 1 in x 1 in

Steel bar is 27 inches long

We have to calculate weight of steel bar

Formula used for calculation

Density = mass/volume

Weight = density x volume

We can get the volume of steel bar as

Volume of steel bar = length x breadth x height

Volume of steel bar = 1 x 1 x 27Volume of steel bar = 27 in³

Now, we will calculate the weight of the steel bar

Weight = density x volume

Weight = 0.283 x 27Weight = 7.641 lbs

So, the weight of a 1 in x 1 in steel bar if it were 27 in long would be 7.64 lbs.

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The height is 1.49 minutes, and the solidification time for a cylinder with double the diameter is 1.88 minutes.

Casting 10.5 requires knowledge of the Chvorinov's rule, which provides a mathematical relationship between the solidification time of a casting and its volume-to-surface area ratio. The rule states that:

t = C * V^m / A

where:

t = solidification time

C = a constant that depends on the casting material and the mold material

V = volume of the casting

A = surface area of the casting

m = a constant that depends on the shape of the casting

For a cylinder with a diameter of 1.0 in. and a height of 3 in., the volume and surface area can be calculated as:

V = π * (d/2)^2 * h = 0.589 in^3

A = π * d * h = 9.424 in^2

To calculate the solidification time for the given casting, we need to know the values of C and m. These values are typically determined experimentally for a given material and mold. For the purposes of this problem, we will assume that C = 2.5 and m = 2.

Using these values, we can calculate the solidification time for the given casting as:

t = 2.5 * V^2 / A = 0.94 minutes

Now, to calculate the solidification time for a cylinder with double the height, we simply need to double the volume while keeping the surface area constant:

V' = π * (d/2)^2 * 2h = 1.178 in^3

A' = A = 9.424 in^2

Using the same values of C and m, the solidification time for the doubled-height cylinder can be calculated as:

t' = 2.5 * V'^2 / A' = 1.49 minutes

Similarly, to calculate the solidification time for a cylinder with double the diameter, we need to quadruple the volume while doubling the surface area:

V'' = π * (d)^2 * h = 2.356 in^3

A'' = 2 * A = 18.849 in^2

Using the same values of C and m, the solidification time for the doubled-diameter cylinder can be calculated as:

t'' = 2.5 * V''^2 / A'' = 1.88 minutes

Therefore, the solidification time for a cylinder with double the height is 1.49 minutes, and the solidification time for a cylinder with double the diameter is 1.88 minutes.

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Answer: coal

Explanation:  Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy. Once these resources are used up, they cannot be replaced, which is a major problem for humanity as we are currently dependent on them to supply most of our energy needs

The elastic modulus parallel to the fibers of a composite material made of type E-glass fibers embedded in a matrix of ABS plastic, with all fibers to be aligned in the same direction can be calculated as follows:First, we need to calculate the elastic modulus of each component of the composite material.

The elastic modulus of type E-glass fibers is 72 GPa, and the elastic modulus of ABS plastic is 2.5 GPa.Next, we need to calculate the volume fraction of each component. If we assume that the composite material is made up of 60% type E-glass fibers and 40% ABS plastic, then the volume fraction of type E-glass fibers is 0.6, and the volume fraction of ABS plastic is 0.4.

Finally, we can use the rule of mixtures to calculate the elastic modulus parallel to the fibers. The rule of mixtures states that the elastic modulus of a composite material is equal to the weighted average of the elastic moduli of the individual components, where the weights are the volume fractions.

Therefore, the elastic modulus parallel to the fibers is given by:

Elastic modulus parallel to fibers = (Volume fraction of type E-glass fibers x Elastic modulus of type E-glass fibers) + (Volume fraction of ABS plastic x Elastic modulus of ABS plastic)

Elastic modulus parallel to fibers = (0.6 x 72 GPa) + (0.4 x 2.5 GPa)

Elastic modulus parallel to fibers = 43.5 GPaSo, the elastic modulus parallel to the fibers of the composite material is 43.5 GPa.

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Answer:

B

Explanation:

The reason its B is because.

The process of foliation and bedding affects the weathering of the rock layer by changing the formation, alignment, textures, and direction of the mineral grains and particles of the rock.

Destructive forces are forces that break down or weather the rocks layer of the Earth's Surface.

Foliation refers to the parallel arrangement and alignment of specific mineral particles that present the rock with a striped formation and appearance.

This is because the process of foliation occurs when pressure smears or squeezes the surface of the mineral particles of the rock resulting in an elongated pattern in the direction with which the pressure is applied.

Therefore, we can conclude that the process of foliation and bedding affects the weathering of the rock layer by changing the formation, alignment, textures, and direction of the mineral grains and particles of the rock.

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The three laws dealing with the creation of various spectra are due to  (C) Kirchhoff.

The three laws dealing with the creation of various spectra are known as Kirchhoff's laws. They were formulated by German physicist Gustav Kirchhoff in the 19th century and describe the behavior of light when passing through or emitted by different materials.

Kirchhoff's laws are as follows:

1) Kirchhoff's First Law, also known as the law of thermal radiation, states that a hot, dense object (like a solid, liquid, or dense gas) emits a continuous spectrum of light. This law is associated with the work of many scientists, including Max Planck and Stefan-Boltzmann.

2) Kirchhoff's Second Law, also known as the law of emission, states that a hot, low-density gas produces an emission spectrum consisting of bright, discrete lines at specific wavelengths. This law is closely associated with the work of the German physicist Robert Bunsen and his collaborator Gustav Kirchhoff.

3) Kirchhoff's Third Law, also known as the law of absorption, states that a cool, low-density gas, when subjected to a continuous spectrum of light, absorbs specific wavelengths corresponding to its own emission spectrum. This law is essential in understanding how elements in stars and other celestial bodies can be identified based on their absorption lines in the spectrum.

While other scientists such as Newton, Fraunhofer, Bohr, and Einstein made significant contributions to the field of optics and spectroscopy, the laws specifically dealing with the creation of various spectra are attributed to Kirchhoff.

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Answer:

I believe the answer is D: Conductor.

The angular distance that the pie plate has moved through is approximately:- 5.91 revolutions- 37.18 radians- 2129 degrees

The circumference of the pie plate can be calculated as:

C = πd = π(8.5 in) ≈ 26.7 in

To find the angular distance that the pie plate has moved through, we need to know the fraction of a complete revolution that corresponds to a linear distance of 158 in on the circumference of the pie plate. We can use the formula:

θ = s / r

where:

θ = angular distance in radians

s = linear distance

r = radius

The radius of the pie plate is half of the diameter, or:

r = 8.5 in / 2 = 4.25 in

Using this radius and the given linear distance, we get:

θ = s / r = 158 in / 4.25 in ≈ 37.18 radians

To convert radians to revolutions, we can use the fact that 1 revolution is equivalent to 2π radians:

θ = 37.18 radians = 37.18 / (2π) revolutions ≈ 5.91 revolutions

To convert radians to degrees, we can use the fact that 180 degrees is equivalent to π radians:

θ = 37.18 radians = (37.18 radians) * (180 degrees / π radians) ≈ 2129 degrees.

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If the separation distance is doubled, then the electric field decreases by a factor of 4.

We know that the electric field strength is known to depend on the magnitude of the charge and the distance of separation. We know that the electric field refers to the region in which the influence of a charge is felt. Recall that a charge is a specie that is positively or negatively charged. The charge on a specie must always be shown by its sign.

We know that the electric field is the region in space where the influence of a charge can be felt. If a charge is placed in the vicinity of another charge, the second charge would experience a force due to the presence of the first charge. This is because the second charge was brought into the electric field of the first charge.

Thus we know that;

E = Kq/r^2

Where;

E = electric field strength

q = magnitude of charge

r = distance of separation

Now;

E = 9.0* 10^9 * 3.052 * 10^-6/(8.22 * 10^-2)^2

E = 4 N/C

Given that the electric filed strength is inversely proportional to the distance of separation, when the distance between the charges is doubled, the electric field decreases by a factor of 4.

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The force that the input force must balance is the weight of the resistance. So, (D) 1,000 lb., is the right response.

In a frictionless ideal pulley system, the weight of the resistance is equal to the force needed to lift it. This is because in a frictionless system, there is no loss of force due to friction.

Therefore, the input force required to lift the 1,000 lb resistance would also be 1,000 lb. According to Newton's third law of motion, the force exerted by the pulley on the resistance is equal in magnitude and opposite in direction to the force exerted by the resistance on the pulley.

In this case, the weight of the resistance acts as the force that needs to be balanced by the input force. Hence, the correct answer is D. 1,000 lb.

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Acceleration = (change in speed) / (time for the change)

Change in speed = (speed after the change) - (speed before the change)

Change in speed = (65 m/s) - (35 m/s)  =  30 m/s

Acceleration = (30 m/s) / (5 s)

Acceleration = 6 m/s²

speed of horse= 17m/s

total time = 8sec

displacement= velocity * time

                        =17*8

                        = 136

Therefore, in 8 sec horse traveled 136m.

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Answer:The principle that states that a change in pressure at any point in a fluid in a closed container is transmitted equally and unchanged in all directions throughout the fluid is known as Pascal's principle.

Explanation:.

To find the average time interval between molecular collisions, calculate the average velocity using Vavg = √(8RT / πM), substitute Vavg and l into f = (Vavg / l)(b) to find the collision frequency, and then take the reciprocal of the collision frequency to obtain the average time interval.

First, we find the average velocity (Vavg) of the molecule using the formula Vavg = √(8RT / πM), where R is the gas constant, T is the temperature, and M is the molar mass of the gas molecule. This formula relates the average velocity of gas molecules to temperature and molar mass.

Next, we substitute the values of Vavg and l into the formula for the collision frequency f = (Vavg / l)(b), where b is the effective collision cross-sectional area. This formula gives the number of collisions a molecule makes with other molecules per unit time.

Finally, to find the average time interval between collisions, we take the reciprocal of the collision frequency. This gives us the desired answer, which represents the average time it takes for a molecule to collide with another molecule.

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Answer:

yes that is correct

Explanation:

The average power of the engine will be 42050 watt.

Power is the pace of production of work. The watt (W), which is equal to 1 joule per second (1J/s), is the SI unit for power. Power is a measure of how quickly energy is used up since power is the transmission of energy. An example would be a 60-W light bulb, which uses 60 J of energy every second. P = E/t, where P stands for power, E for energy, and t for time in seconds, is the formula. According to this equation, power is the amount of energy consumed in a given amount of time.

Given, mass = 1300 kg

initial velocity, u = 0

final velocity, v = 13 m/s

time, t = 13 s

by using E = 1/2 m [v² - u²]

E = 1/2 ×1300×[29² - 0²]

E = 546650 J

now, Power, P = E/t

P = 546650/13

P = 42050 watt

The average power of the engine will be 42050 watt.

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Answer:

Ke²

Explanation:

So,

q1 = e

q2 = e

r = 1m

By coulumb's law,

F = K (q1q2/r²)

F = K (e)(e)/(1)²  

F = Ke²  

Option(a)

The elastic potential energy stored is 0.9375 J.

The elastic potential energy stored in a spring can be calculated using the following formula:

Elastic potential energy = 0.5 × k × x²

where:

k is the spring constant

x is the distance the spring is compressed or stretched

In this case, the spring constant is given as 12.5 N/mm and the compression is 0.15 mm. Plugging these values into the formula, we get the following:

Elastic potential energy = 0.5 × 12.5 N/mm × (0.15 mm)²

= 0.9375 J

Therefore, the elastic potential energy stored is 0.9375 J.

The elastic potential energy stored in the abductin pad is used to open the shell when the muscles relax. The muscles close the shell by contracting, which compresses the pad. When the muscles relax, the pad expands, pushing the shell open. The energy to do this comes from the elastic potential energy that was stored in the pad when it was compressed.

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Answer: D. It shows Newton's first law of motion, which states that an object tends to stay in motion unless an outside force acts upon it.

Explanation:

Newton's first law of motion states that an object tends to stay in motion unless an outside force acts upon it.

The force Jane push on Mary is 10N. And the acceleration of mary is 1.82m/s² and acceleration for Jane is 2.86m/s²

Newton third law of motion states that If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A. It can also be defined as , action and reaction are equal but opposite in direction.

For example if a man of weight 100N sits on a bench, the force the bench will have on the man is also 100N.

Similarly, if Mary pushes Jane with a force 10N, therefore Jane will also push Mary with a force 10N in the opposite direction.

From F = ma

the acceleration of mary = F/m

= 10/5.5 = 1.82m/s²

the acceleration of Jane =F/m

= 10/3.5 = 2.86m/s²

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Through photosynthesis process introduced oxygen into the atmosphere.

Jan Ingenhousz was a Dutch-born British physician and scientist who was most famous for discovering photosynthesis, the process by which green plants in sunlight absorb carbon dioxide and release oxygen. He was born on December 8, 1730, in Breda, the Netherlands, and died on September 7, 1799, in Bowood, Wiltshire, England. The process through which plants convert carbon dioxide, water, and sunshine into oxygen and sugar-based energy is known as photosynthesis. The vast majority of life on Earth depends on photosynthesis to survive. It is how almost all of the biosphere's energy is made accessible to living beings.

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Answer: Pues el microscopio :/ I think

Explanation:

Answer:

When an electromagnetic wave passes from space to matter, some part of the energy is absorbed by the matter and it increases its energy. The wave may reflect and some part may pass through the matter depending on the amount of energy they have. The amplitude of the wave decreases if some parts of it are reflected.

Electromagnetic radiation is one of the many ways that energy travels through space. The heat from a burning fire, the light from the sun, the X-rays used by your doctor, as well as the energy used to cook food in a microwave are all forms of electromagnetic radiation. While these forms of energy might seem quite different from one another, they are related in that they all exhibit wavelike properties.

The measure of central tendency that should be used to calculate the cutoff time for the final race is the median.

Option C.

The median is the middle point in a dataset—half of the data points are smaller than the median and half of the data points are larger.

To find the median: Arrange the data points from smallest to largest. If the number of data points is odd, the median is the middle data point in the list.

So from the given data of the 100 meter dash, the measure of central tendency that should be used to calculate the cutoff time for the final race is the median.

The median will help to separate half of the data points that are smaller than the cutoff time and half of the data points are larger than the cutoff time.

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The wavelength of photon in 2 significant is 4.8 × 10∧3 angstrom

Given: Mass of photon= Mass of electron= 9.11×10^-31 kg

            Velocity= 1500m/s

            Planck constant(h)= 6.6261*10^-34 Js

            λ= h/mv=  6.6261*10^-34 Js/(9.11×10^-31× 1500)kgm/s

               = 4.8 × 10^3 angstrom

About De-brogile wavelength:

De Broglie stated that every particle could be described as having a particular wavelength and formulated the famous de Broglie equation.

De Broglie asserts that a beam of particles with a certain mass can act like a matter wave. The particle's mass and velocity are related to its wavelength:

λ= h/mv, where,

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