A ball is launched horizontally at 150 m/s from a cliff. What is its horizontal velocity after 5 seconds?

Answer:

Options B

Explanation:

The appropriate quantitative research method for understanding political views held by the young population of a specific area is written surveys (option b). Surveys allow for the collection of data from a large number of participants, and specific questions can be asked to gather data on political views.

Participant observation (option a) involves direct observation of individuals in a natural setting, which may not be practical for studying political views.

Secondary data analysis (option c) involves analyzing data that has already been collected, and may not be specific to the young population or the area of interest.

Laboratory experiments (option d) are typically used to study cause-and-effect relationships between variables, which may not be applicable to studying political views.

Therefore, the best option for understanding the political views held by the young population of a specific area is written surveys.

To understand the political views of the young population of a specific area, a researcher can use written surveys, participant observation, and secondary data analysis as quantitative research methods.

If a researcher is trying to understand the political views held by the young population of a specific area, they should use written surveys, participant observation, and secondary data analysis as quantitative research methods.

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It will take about 2,500 dump trucks to haul the material. Assuming the capacity of the dump truck is 16 cubic yards.

Note: A standard dump truck is between 10 -16 cubic yards.

1 cubic yard = 27 cubic feet.

from the question:

40,000 cubic yards= 65 cubic feet

hence,

Assuming the dump truck capacity is 16 cubic yards

Then,

number of dump trucks = 40,000 cubic yards/16 cubic yards

                                      =2,500

Therefore a dump truck of 16 cubic yards capacity, will need about 2,500 dump trucks to haul the material totaling 40,000 cubic yards.

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Answer:

a) 2.28 m/s²

b) 159.86 m

Explanation:

Part A:

u = 0 m/s

v = 27 m/s

t = 11.8 seconds

a = ?

Formula:

v = u + at

=> 27 = 0 + a(11.8)

=> 27 = a(11.8)

=> a(11.8) = 27

=> a = 27/11.8

=> a = 2.28 m/s²

Part B:

s = ?

Formula:

s = (v² - u²)/2a

s = (27² - 0²) /2(2.28)

  = 729/4.56

  = 159.86 m

Given:

the temperature of the air is

Required: velocity of the wave in air

Explanation: At normal atmospheric pressure, the temperature dependence of the speed of wave is given by

Plugging the value of T in above relation we get

Thus, the speed of the wave is

If An object is placed at the position x1 = 73 cm and a second mass that is 4/3 times as large is placed at x2 = 247 cm, the location is at 172.44cm

The location of he center of the mass of the object would be

73 cm + (4/3 * 247) / 1 + 4/3

= 73 CM + 329.3 / 2.333

= 402.3 /2.33

= 172.44 CM

Hence we can conclude that the location is at If An object is placed at the position x1 = 73 cm and a second mass that is 4/3 times as large is placed at x2 = 247 cm, the location is at 172.44cm

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Answer:

Explanation:

10. As a spaceship is moving toward Earth, an Earthling measures its length to be 325 m, while the captain on board radios that her spaceship's length is 1150 m. (c = 3.00 × 108 m/s) (a) How fast is the rocket moving relative to Earth? (b) What is the TOTAL energy of a 75.0-kg crewman as measured by (i) the captain in the rocket and (ii) the Earthling?

Answer: Density = 6071.428571 kg/m³

Explanation: Given that mass m=17 kg

volume displaced v=2.8L

We know that

density = mass/volume

Here density=17kg/2.8L

Also 1L=1000m³ Hence

density=17kg/2.8×10⁻³m³

           =6071.428571 kg/m³

Continents have undergone major shifts around 12 times.

To calculate the number of times continents have gone through major shifts in the 4.6 billion year history of the Earth, we can divide the total time span by the average duration between shifts.

Total time span = 4.6 billion years

Average duration between shifts = 395 million years

To convert the total time span to years, we multiply 4.6 billion by 1 billion (1 billion = 1,000 million).

Total time span in years = 4.6 billion years × 1 billion = 4.6 × 10^9 years

Now we can calculate the number of shifts by dividing the total time span by the average duration between shifts:

Number of shifts = Total time span / Average duration between shifts

               = (4.6 × 10^9 years) / (395 million years)

               ≈ 11.65

Therefore, continents of our planet have gone through major shifts approximately 11.65 times in the 4.6 billion year history of the Earth. Since we cannot have a fraction of a shift, we can round the result to the nearest whole number. Thus, continents have undergone major shifts around 12 times.

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There are 90 phones of volume, 10-7 W/m2 of sound intensity, and 0.0314 watts of source power.

A straightforward frequency analysis compares the values of the fields you provide and generates a report listing each value for those fields along with the frequency at which each value occurs.

The rate at which a sound power wave repeats itself, also known as frequency or pitch, is measured in cycles per second. Bullfrog calls and cricket chirps have lower frequencies than drum beats and whistles, respectively.

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Answer: A

Explanation:

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\(\longrightarrow\) The rate of change of velocity per unit time is called acceleration.

\(\longrightarrow\) Its SI unit is m/s².

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Scientists can search for numerous signs of a supermassive black hole at the heart of a galaxy. Here are a few of the typical techniques astronomers employ to research supermassive black holes:

The gravitational pull of it revealed it to be dense and unmoving. There is a supermassive black hole in the centre of the Milky Way, and this was the first proof of it.

Astronomers can monitor the motion of stars close to a galaxy's centre. Supermassive black holes are most likely located at the core of an invisible entity that has a very strong gravitational attraction and the stars are orbiting it.

A supermassive black hole's gravitational pull can cause it to bend the path of light around it if it is situated between Earth and a faraway light source.

This phenomenon is known as gravitational lensing. Astronomers may see this “lensing” phenomenon and utilize it to investigate the black hole.

Therefore, Astronomers may create a thorough picture of the characteristics of a supermassive black hole at the heart of a galaxy by examining these and other observational data.

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The average velocity of the electron over the entire time interval is 1.182 x 10⁷ m/s.

The average speed of the electron over the entire time interval is  6.454 x 10⁷ m/s.

The average velocity of an object is the change in the displacement of the object with time.

average velocity = total displacement / total time of motion

average velocity = (final position - initial position)/total time

average velocity = (2.39 m - 1.65)/(2.89 x 10⁻⁸  +  3.37 x 10⁻⁸)

average velocity = 1.182 x 10⁷ m/s

The average speed of an object is ratio of total distance to total time of motion of the object.

average speed =  (2.39 m + 1.65 m)/(2.89 x 10⁻⁸  +  3.37 x 10⁻⁸)

average speed = 6.454 x 10⁷ m/s

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Answer:Magnetic fields from two sources add up as vectors at each point, so the strength of the field is not necessarily the sum of the strengths1. Magnetic fields are vectors, which means they have direction as well as size. Therefore, the sum of two magnetic fields is not simply the sum of their magnitudes2.

Explanation:

The distance travelled by car A before catching car B is 363.3 m.

The distance travelled by car A is the total path covered by car A before catching up with car B.

The distance between car A and car B is calculated by applying the principle of relative velocity as follows;

(Va - Vb)t = d

where;

Va = acceleration x time

Va = 8t

distance between car A and car B when car A start moving = 50 m/s x 5 s = 250 m

The time taken for car A to catch car B is calculated as;

(Va - Vb)t = d

(8t - 50)t = 250

8t² - 50t = 250

8t² - 50t - 250 = 0

solve the quadratic equation using formula method;

a = 8, b = -50, c = -250

t = 9.53 seconds

The distance travelled by car A before catching car B is calculated as;

s = vt + ¹/₂at²

where;

s = ¹/₂(8)(9.53²)

s = 363.3 m

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Answer:

a

Explanation:

a push or a pull that occurs when an object interacts with another object or field.

pls mrk me brainliest

Answer: I think the answer is A Relate new Knowledge

Explanation:

It kinda just makes sense.

Answer:

A. Relate new knowledge to what is already known

Explanation:

I took the test

The car is moving at approximately 12.5 meters per second.

The kinetic energy (KE) of an object can be calculated using the formula:

KE = 1/2 * m * \(v^2\)

where

KE = kinetic energy,

m =Mass of the object, and

v = velocity.

In this case, we are given the mass (m) of the car as 1600 kg and the kinetic energy (KE) as 125,000 J. To find the velocity .

Substituting the  values , we have:

125,000 J = 1/2 * 1600 kg *\(v^2\)

Now, we can solve for v by rearranging the equation:

\(v^2\) = (2 * 125,000 J) / 1600 kg

\(v^2\) = 156.25 \(m^2/s^2\)

Taking the square root, we find:

v = √156.25\(m^2/s^2\)

v ≈ 12.5 m/s

Therefore, the car is moving at approximately 12.5 meters per second.

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Answer:

  q₂ = ± 1.306 10⁻⁶ C

   q₂ =  ± 3.073 10⁻⁶ C

Explanation:

We must solve this exercise using Coulomb's law, let's write the equilibrium equation for each case

first case

     F₁ = k q₁ q₂ / r²         (1)

where F1 is the force on sphere 1, with a value of F₁ = 0.110 N; r is the distance between them r = 0.573 m

second case.

The spheres were joined with a conductive wire, so the charge of the two is equal, then the wire is removed and

       -F₂ = k q₃ q₃ / r²           (2)

In this case the force is expelling and is equal to F₂ = 0.0489 N

when the spheres are joined with the wire the charge of the spheres is distributed evenly between them two

         q₁ + q₂ = 2 q₃             (3)

we can see that there are three equations with three unknowns for which the system can be solved

let's substitute equation 3 in 2

         - F₂ = k (q₁ + q₂)² / r²

we join this equation with equation 1

          F₁ = k q₁ q₂ / r²

          -F₂ = k (q₁ + q₂)²/4r²

          q₁ = F₁ r² / k q₂

         - F₂ = k (F₁ r² / k q₂ + q₂)²/4r²

Let's replace the values ​​and work out

         - 0.0489 = 9 109 (0.110 0.573² / (9 10⁹ q₂) + q₂)² / 0.573²

          - 0.0489 4 0.573²/9 10⁹ = (0.110 0.573² / (9 10⁹ q₂) + q₂)²

          - 7.1356 10⁻¹² = (4.013 10⁻¹² / q₂ + q₂)²

          - 7.1356 10⁻¹² = 1 / q₂² (4.013 10⁻¹² + q₂² )²

          - 7.1356 10⁻¹² q₂² = (16.104 10⁻²⁴ + 4.013 10⁻¹² q₂² + q₂⁴

          q₂⁴ + q₂² (4,013 10⁻¹² + 7,1356 10⁻¹²) + 16,104 10⁻²⁴ = 0

we change variables

        q’ = q₂²

          q'² + q'  11.1486 10⁻¹² + 16.104 10⁻²⁴ = 0

we solve this quadratic equation

          q '= [- 11.1486 10⁻¹² ±√ ((11.1486 10⁻¹² )² - 4 16.104 10⁻²⁴)] / 2

          q '= [- 11.1486 10 12 ±√ (59.8753 10⁻²⁴)] / 2

          q '= [- 11.1486 ± 7.7379] / 2 10⁻¹²

          q'1 = -1.70535 10⁻¹²

          q'2 = -9.44325 10⁻¹²

           q' = q₂²

           q₂ = √ q'

           q₂ = ± 1.306 10⁻⁶ C

           q₂ =  ± 3.073 10⁻⁶ C

since q 'is squared of these charges they can be positive or negative giving the same result.

Answer:

c h i c k e n n u g g e t s . . . . . .

jk its 2.6

Answer:

Organ system because multiple organs make up an organ system and multiple organ systems make up an organism

Answer:

C.Both objects have the same amount of kinetic energy.

Explanation:

different masses can have the same kinetic energy

Hope it helps

If a 5 kg object is moving with a speed of 10 m/s, and a 10 kg object is moving with a speed of 5 m / s, then the 5 kg object has more kinetic energy, therefore the correct answer is option A.

The sum of all the energy in motion (total kinetic energy) and all the energy that is stored in the system (total potential energy) is known as mechanical energy.

The expression for total kinetic energy can be given as follows

KE = 1/2 mv²

As given in the problem, In the diagram below, a 5 kg object is moving at a speed of 10 m/s, and a 10 kg object is moving at a speed of 5 m/s.

Thus, the 5 kg object has more kinetic energy .

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Explanation:

The momentum of the three objects are as follow :

11 kg-m/s, -65 kg-m/s and -100 kg-m/s

Before collision, the momentum of the system is :

\(P_i=11+(-65)+(-100)\\\\P_i=-154\ kg-m/s\)

After collison, they move together. It means it is a case of inelastic collision. In this type of collision, the momentum of the system remains conserved.

It would mean that, after collision, momentum of the system is equal to the initial momentum.

Hence, final momentum = -154 kg-m/s.

According to the given statement the heat absorbed is 43676.78 J .

The water's specific heat and the formula Q= mcΔT are used to compute the amount of heat absorbed. At 100°C, water vaporizes into steam. Calculating the amount of heat absorbed requires multiplying the number of moles of water by the molar heat of vaporization.

Mass, m = 227.1grams

To find how much heat is absorbed when 227.1 grams of steam is heated from  115.6°C to 12.2°C.

Heat absorbed is given by :

Q= mcΔT

c is specific heat of water

Put all the values, we get :

Q = 227.1 * 1.86 * (115.6 - 12.2)

Q = 43676.78 J

43676.78 J heat is absorbed.

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Answer:

The amount of energy carried by a wave is related to the amplitude of the wave

Explanation:

A high energy wave is characterized by a high amplitude; a low energy wave is characterized by a low amplitude.  The energy imparted to a pulse will only affect the amplitude of that pulse.

Hope this helped!!!

Answer:

Below

Explanation:

Kinetic Energy = 1/2 * m * v^2

                        = 1/2 * .45 * .2^2 = .009 J

Important Formulas:

\(KE=.5mv^2\)

Kinetic Energy(measured in joules) = .5 * mass(measured in kg) * velocity(measured in m/s)^2

__________________________________________________________

Given:

\(m=0.45kg\)

\(v=0.20m/s\)

\(KE=?\)

__________________________________________________________

\(KE=.5mv^2\)

\(KE=.5(0.45)(0.20)^2\)

__________________________________________________________

\(\fbox{KE = 0.009J}\)

According to the legend, Arthur was the son of King Uther Pendragon. After Arthur was born, he was given to Merlin. Merlin was a magician and wise man who advised the kings of Britain. Once Uther died, it was said that the next king would be able to pull the sword Excalibur out of a stone.

this is just a summary

Answer:

e

Explanation:

Answer:

799.54 ft

Explanation:

Linear thermal expansion is:

ΔL = α L₀ ΔT

where ΔL is the change in length,

α is the linear thermal expansion coefficient,

L₀ is the original length,

and ΔT is the change in temperature.

Given:

α = 1.2×10⁻⁵ / °C

L₀ = 800 ft

ΔT = -17°C − 31°C = -48°C

Find: ΔL

ΔL = (1.2×10⁻⁵ / °C) (800 ft) (-48°C)

ΔL = -0.4608

Rounded to two significant figures, the change in length is -0.46 ft.

Therefore, the final length is approximately 800 ft − 0.46 ft = 799.54 ft.

The activity is a radioactive material is the number of counts per second it produces. 1 count per second (cps) = 1 Becquerel (Bq).

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