A scientist reads relevant literature and designs her experiment. She repeats her experiment several times and collects an entire set of data every time. As compared to a single data set, the multiple data sets lead her to modified conclusions.

How is skepticism important to the progress of science in this scenario?

Answer:

F=ma

Plug it in:

5=10a

5/10=(10a)/10

.5m/s²=a

Explanation:

Brainliest?

Answer:

\(\frac{1}{2} \frac{m}{s^2}\)

Explanation:

Recall the equation F = ma. We want to find a, and we already know F and m, so we can plug those in. \(5N = 10kg \cdot a -> a = 5N/10kg = \frac{1}{2} \frac{m}{s^2}\)

The pH of the solution is approximately 2.919.

To determine the pH of the solution, we need to consider the dissociation of HF (hydrofluoric acid) and the equilibrium between HF and its conjugate base, F^-.

HF can dissociate according to the equation: HF ⇌ H^+ + F^-

Given that the solution is 0.25 M in HF and 0.15 M in F^-, we can assume that HF is the predominant species and the concentration of F^- is relatively low. Therefore, we can consider HF as the acid and F^- as the conjugate base.

The pKa of HF is given as 3.14. The pKa is a measure of the acid's strength, and it is related to the equilibrium constant for the dissociation reaction. In this case, pKa = -log(Ka), where Ka is the acid dissociation constant.

Using the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]), we can calculate the pH of the solution.

pH = 3.14 + log(0.15/0.25) ≈ 3.14 + (-0.221) ≈ 2.919

Therefore, the pH of the solution is approximately 2.919.

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Answer:

force that acts in the opposite direction as gravitational force

Answer:

Normal force is a force exerted by the surface on an object in contact with

The converse of the statement "No pilots are mechanics" is No mechanics are pilots.

Hence, the correct option is A.

The converse of a statement switches the subject and the predicate and negates both. In the original statement, the subject is "pilots" and the predicate is "mechanics."

The original statement states that there is no overlap between pilots and mechanics. In the converse statement, the subject becomes "mechanics" and the predicate becomes "pilots," and it still states that there is no overlap between the two groups.

Therefore, The converse of the statement "No pilots are mechanics" is No mechanics are pilots.

Hence, the correct option is A.

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If you shine a blue light on a red apple, the apple would appear to be black or very dark. This is because the color of an object is determined by the wavelengths of light that it reflects.

. A red apple appears red because it reflects wavelengths of light that correspond to the color red, while absorbing other wavelengths. When a blue light is shone on the apple, the wavelengths of light that the apple would normally reflect are being absorbed by the blue light, making the apple appear to be a darker color.

This phenomenon is called subtractive color mixing, where the colors of objects are determined by the colors of the light that are absorbed, or subtracted, by the object.

In this case, the blue light is subtracting the colors that the apple would normally reflect, resulting in a darker appearance. It is important to note that the apple is still red, but the blue light is altering our perception of its color due to subtractive color mixing.

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I guess a missile?

A bird is not a projectile, a ball isn't really, and an airplane isn't, so, yeah.

?:]

Answer:

To determine the rider's acceleration after two minutes, we need to find the second derivative of the distance function s(t) = 3t^3 + 2t^2 + 4 with respect to time. In other words, we need to find the rate of change of the rider's velocity.

The first derivative of s(t) with respect to time is v(t) = 9t^2 + 4t.

The second derivative of s(t) with respect to time is a(t) = 18t + 4.

Now that we have the second derivative, we can find the acceleration after two minutes.

a(2) = 18(2) + 4 = 40 miles/min^2

Therefore the rider's acceleration after two minutes is C. 40 miles/min^2

Answer:

Vector, in physics, a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity's magnitude. Although a vector has magnitude and direction, it does not have position

Answer:

Given,

Object distance, u=25cm

Focal length, f=20cm

From mirror formula

f

1

​

=

v

1

​

+

u

1

​

−20

1

​

=

v

1

​

−

25

1

​

⇒

v

1

​

=−

20

1

​

+

25

1

​

v=100cm

The image will be real, inverted magnified

Explanation:

Given,

Object distance, u=25cm

Focal length, f=20cm

From mirror formula

f

1

​

=

v

1

​

+

u

1

​

−20

1

​

=

v

1

​

−

25

1

​

⇒

v

1

​

=−

20

1

​

+

25

1

​

v=100cm

The image will be real, inverted magnified

The potential energy of a stone of mass 10 kg that is lifted to a height of 8m is -784 Joule.

Potential energy is essentially what it sounds like, though there are some nuances. An object's actual potential energy is determined by its position in relation to other objects. For example, a brick suspended from a two-story building has more potential energy than a brick resting on the ground. This is due to the brick's relative position to the Earth providing it with more energy. However, because there is no force acting on them, two bricks next to each other do not give each other more energy.

Given,

Mass of stone = 10kg

Height = 8m

Potential energy can be determined by formula,

P=mgh

Where, g= gravitational acceleration = \(-9.8 m/s^2\)

Here, gravitational acceleration is negative because stone is thrown against the gravitational pull

\(P=10*8*(-9.8)=-784 J\)

Hence, the potential energy is -784 J

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The speed of car is 106.67 miles per hour

To solve problems involving speed and distance we are required to first find speed or distance travelled in an hourly timeframe

It is given that car takes 4 hours to cover the distance at a speed of 40 miles per hour

Therefore, total distance travelled by the car= speed x time

                                                                          = 40 miles per hour x 4 hour

                                                                          =160 miles

We are required to find the speed of the car if the distance is to be covered in 1.5 hours

We are required to find the speed by the formula speed= Distance/time

distance= 160 miles     time = 1.5 hour

speed= 160/1.5=106.666=106.67 miles per hour

Hence the speed is 106.67 miles per hour

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The required amount of heat energy lost in a system when surroundings performed certain amount of work and when internal energy is increased is  calculated to be - 30 kJ.

Given that,

Work done on the system w = 75 kJ

Internal energy ΔU is increased by 45 kJ

Heat energy q lost or gained by the system = ?

From the first law of thermodynamics, mathematically, expression can be written as, ΔU = q + w

q = ΔU - w = 45 kJ - 75 kJ = - 30 kJ

The negative sign indicates that the heat energy is lost.

Thus, the amount of heat energy lost in the system is - 30 kJ.

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Based on the illustration above, the height of the cliff is 56.44 m.

Given, A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.4 s later. If the speed of sound is 340 m/s, we need to determine how high is the cliff.

Using the kinematic equation for the free fall of objects, we can determine how high the cliff is. We know that the acceleration due to gravity is 9.8 m/s² and the final velocity is zero since the rock comes to rest after striking the ocean.

Therefore, the equation for the height of the cliff is given by:

h = 0.5gt²

where h is the height of the cliff, g is the acceleration due to gravity, and t is the time it takes for the sound of the rock striking the ocean to be heard.

Given that t = 3.4 s, we have:

h = 0.5 × 9.8 m/s² × (3.4 s)²h = 56.44 m

Therefore, the height of the cliff is 56.44 m.

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Answer:

c. earth rotates on it tilted axis and orbit around the sun at the same time​

Explanation:

Earth rotation can be defined as the amount of time taken by planet earth to complete its spinning movement on its axis.

This ultimately implies that, the rotation of earth refers to the time taken by earth to rotate once on its axis. One spinning movement of the earth on its axis takes approximately 24 hours to complete with respect to the sun. Thus, this makes us to experience day and night (sun rise and sun set) due to the rotation of planet about its axis.

Hence, the sun rise and set because the earth rotates on it tilted axis and orbit around the sun at the same time​

Based on the information provided, the BEST major for Dev to pursue would be Hospitality.

Force is a physical quantity that describes the interaction between two objects or systems. It is a vector quantity, which means that it has both magnitude and direction. Force can cause an object to accelerate, change direction, or deform. Force is typically measured in units of Newtons (N) in the International System of Units (SI). One Newton is defined as the force required to accelerate a mass of one kilogram at a rate of one meter per second squared. In other systems of measurement, such as the British system, force may be measured in units such as pounds or ounces. Some common examples of forces include gravity, friction, electromagnetic forces, and applied forces such as pushing or pulling. Understanding the concept of force is important in many areas of physics, engineering, and other sciences, as it helps explain how objects interact with each other and how they move and change over time.

Here,

This major would allow him to explore his passion for food and entertaining while also providing opportunities for hands-on experience and creativity. A degree in Hospitality can lead to careers in the food and beverage industry, hotel management, event planning, and more, all of which would offer the chance to work in dynamic, interactive environments rather than being stuck behind a desk all day.

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Autosomes are homologous chromosomes i.e. chromosomes which contain the same genes (regions of DNA) in the same order along their chromosomal arms. The chromosomes of the 23rd pair are called allosomes consisting of two X chromosomes in most females, and an X chromosome and a Y chromosome in most males.

Answer: Different types of fuels have varying compositions and release different amounts of pollutants when burned. Here are some common types of fuels and the pollutants associated with them:

Fossil Fuels:

a. Coal: When burned, coal releases pollutants such as carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen oxides (NOx), and particulate matter (PM).

b. Petroleum (Oil): Burning petroleum-based fuels like gasoline and diesel produces CO2, SO2, NOx, volatile organic compounds (VOCs), and PM.

Natural Gas:

Natural gas, which primarily consists of methane (CH4), is considered a cleaner-burning fuel compared to coal and oil. It releases lower amounts of CO2, SO2, NOx, VOCs, and PM.

Biofuels:

Biofuels are derived from renewable sources such as plants and agricultural waste. Their environmental impact depends on the specific type of biofuel. For example:

a. Ethanol: Produced from crops like corn or sugarcane, burning ethanol emits CO2 but generally releases fewer pollutants than fossil fuels.

b. Biodiesel: Made from vegetable oils or animal fats, biodiesel produces lower levels of CO2, SO2, and PM compared to petroleum-based diesel.

Renewable Energy Sources:

Renewable energy sources like solar, wind, and hydropower do not produce pollutants during electricity generation. However, the manufacturing, installation, and maintenance of renewable energy infrastructure can have environmental impacts.

It's important to note that the environmental impact of a fuel also depends on factors such as combustion technology, fuel efficiency, and emission control measures. Additionally, advancements in clean technologies and the use of emission controls can help mitigate the environmental impact of burning fuels.

Answer:

Please find the explanation below

Explanation:

A hypothesis in science is a testable explanation that is yet to be tested via experimentation. It is a predictive statement or suggested solution to an observation. A hypothesis aims at finding a possible explanation/answer to a question, which is subject to testing. One important aspect of formulating a hypothesis is that it tends to connect the independent variable with the dependent/measurable variable.

The statement "RED IS A BEAUTIFUL COLOR" cannot be considered a hypothesis because it does not aim to answer a question that can undergo experimental testing. This statement can not be measured via experimentation. The statement is not a possible answer to a question but rather a personal opinion about something.

Given:

The distance from the tuning fork is d = 300 cm

The power is P = 0.0085 W

To find the intensity.

Explanation:

The intensity is defined as the power per unit area.

Wavelets are in the shape of sphere.

The intensity can be calculated by the formula

On substituting the values, the intensity will be

The intensity o

There is no electric field along the positive z axis for this configuration.

The correct answer is (e) there is no electric field along the positive z axis. This is because the disk has a uniform positive surface charge density and is centered on the origin in the x-y plane.

Since the disk is symmetric around the z axis, the electric field contributions from all points on the disk along the z axis cancel each other out.

The electric field vectors from opposite sides of the disk point in opposite directions along the z axis, resulting in a net electric field of zero.

There is no electric field along the positive z axis for this configuration.

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Answer:

Because no one is using that ball, so it is motionless

Answer:

No one is using the ball (dead ball) and therefore it is motionless and out of play

Explanation:

Answer:

a coil rotating in a magnetic field to change its flux

If she is spinning on the spot she is not travelling anywhere so her distance and displacement are zero.

Physics words like distance and displacement are crucial to understand right because they are frequently misunderstood.

Displacement, a vector quantity, is the shortest path in a straight line between the starting position and the final position. Distance is a scalar quantity, measuring the total distance traveled by an object.

A vector quantity is different from a scalar quantity in that a vector quantity has directional information while a scalar quantity is just a set of integers. A variable with "half-arrows" above it is a vector quantity.

Therefore, If she is spinning on the spot she is not travelling anywhere so her distance and displacement are zero.

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Answer:

\(F=4.27N\)

Explanation:

From the question we are told that:

Current  \(I = 6.52 A\)

Angle \(\theta= 44.8 \textdegree\)

Magnetic field   \(B= 0.258 T.\)

Length \(l=3.61m\)

Generally the equation for  Magnetic force F is mathematically given by

 \(F=BIlsin\theta\)

Therefore

 \(F=0.258*6.52*3.61*sin 44.8\)

 \(F=4.27N\)

Answer:

The answer is "\(1.01 \times 10^{-13}\)"

Explanation:

Using the law of conservation for energy. Equating the kinetic energy to the potential energy.

\(KE=U=\frac{kqq'}{r}\\\\\)

Calculating the closest distance:

\(\to r=\frac{kqq'}{KE}\\\\\)

\(=\frac{k(2e)(79e)}{KE}\\\\=\frac{k(2)(79)e^2}{KE}\\\\=\frac{9.0\times 10^9 \ N \cdot \frac{m^2}{c}(2)(79)(1.6 \times10^{-19} \ C)^2}{(2.25\ meV) (\frac{1.6 \times 10^{-13} \ J}{1 \ MeV})}\\\\\)

\(=\frac{9.0\times 10^9 \times 2\times 79\times 1.6 \times10^{-19}\times 1.6 \times10^{-19} }{(2.25 \times 1.6 \times 10^{-13}) }\\\\=\frac{3,640.32\times 10^{-29}}{3.6 \times 10^{-13} }\\\\=\frac{3,640.32}{3.6} \times 10^{-16}\\\\=1011.2 \times 10^{-16}\\\\=1.01 \times 10^{-13}\)

The bulb will use 584 kW per year.

An electronic bulb is a small and simple light source that uses a wire filament to glow when electricity is applied.

The filament, which is a coiled thin wire, is made of tungsten.

The filament is enclosed in a ball-shaped glass socket and is connected by copper and lead wires attached to the base of the lamp.

The wires and filament are enclosed in a glass bulb that is filled with an inert gas such as argon.

Thin glass is used to make the bulb, which prevents air from reaching the filament and protects it from burning.

Conversion of watts to kilo-watts

1 Watts = 0.001 kW

400 Watts = 0.4 kW

Average working of the bulb = 4 hours

Total time taken by the bulb in a year

= 4 * 365

= 1460 hours

Total power consumed in the year = 584 kWh

The bulb represents 584 kwh per year.

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Answer:

A) OA, AB, BC

B) 25m/s^2

C) see explanation

D) 25

E) Rest

Explanation:

From the Velocity time graph shown:

The positive slope = OA ; This is positive because, it is the point of uniform acceleration on the graph.

Constant slope = AB, the slope here is constant because, AB on the graph is the point of constant velocity.

-ve slope = BC

B) Acceleration of body in path OA.

Acceleration = change in Velocity / time

Acceleration = (150 - 0) / 6

Acceleration = 150/6 = 25m/s^2

C) Path AB is Parallel to the because it marks the period of constant velocity (that is Velocity does not increase or decrease during the time interval).

D) Length of BC

BC corresponds to the distance moved, that velocity / time

Velocity = 150 ; time = 6

Therefore Distance (BC) = 150/6 = 25

E.) Velocity =0 ; Hence body is at rest

The S.I. unit of E is NC^-1 and that of B is NA^-1 m^-1, then unit of E/B is A m/C (ampere meter per coulomb). This unit represents the ratio between the electric field and the magnetic field, indicating the strength and direction of the electromagnetic field.

The SI unit of electric field (E) is NC^(-1) (newton per coulomb) and the SI unit of magnetic field (B) is NA^(-1) m^(-1) (tesla). To determine the unit of E/B, we need to divide the unit of E by the unit of B.

Dividing the unit of E (NC^(-1)) by the unit of B (NA^(-1) m^(-1)), we can simplify the expression:

E/B = (NC^(-1))/(NA^(-1) m^(-1))

To simplify this expression, we can cancel out the common units in the numerator and denominator:

E/B = (N/C)/(N/(A m))

Now, let's simplify further by dividing the numerator and denominator:

E/B = (N/C) * (A m/N)

Canceling out the common units:

E/B = (A m)/(C)

Therefore, the unit of E/B is A m/C (ampere meter per coulomb).

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Answer:

The final velocity is 5.24 m/s

The initial speed is 65.5 m/s

Explanation:

Horizontal Motion

When an object is launched horizontally with an initial speed v from a height h, it describes a curved path ruled exclusively by gravity until it eventually hits the ground.

The horizontal component of the velocity is always constant because no acceleration acts in that direction, thus:

\(v_x=v_o\)

The vertical component of the velocity changes in time t because gravity makes the object fall at increasing speed given by:

\(v_y=g.t\)

The maximum horizontal distance traveled by the object can be calculated as follows:

\(\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}\)

Another useful formula allows us to calculate the distance traveled by the object in terms of time t:

\(\displaystyle y=\frac{g.t^2}{2}\)

a.

The time taken for the arrow to reach the ground can be calculated by solving the above equation for t:

\(\displaystyle t=\sqrt{\frac{2y}{g}}\)

Since y=1.40 m:

\(\displaystyle t=\sqrt{0.2857}\)

t = 0.53 s

The final vertical speed is:

\(v_y=9.8.(0.53)=5.24\ m/s\)

The final velocity is 5.24 m/s

b)

The initial speed can be calculated by solving the following equation for v:

\(\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}\)

\(\displaystyle v=d\cdot\sqrt{\frac {g}{2h}}\)

\(\displaystyle v=35\cdot\sqrt{\frac {9.8}{2(1.40)}}\)

v = 65.5 m/s

The initial speed is 65.5 m/s