A truck traveling at 61 mph brakes to a stop in 231 feet. what was the average acceleration and stopping time?

Answer: 0.7 g/cm³

Explanation:

To find the density of a liquid, we can use the formula:

density = mass / volume

In this case, we know the mass of the empty cylinder is 185 g, and the mass of the cylinder plus the liquid is 465 g. So, we can find the mass of the liquid by subtracting the mass of the cylinder from the total mass:

mass of liquid = 465 g - 185 g = 280 g

We also know that the volume of the liquid is 400 cm³. So we can now find the density of the liquid:

density = 280 g / 400 cm³

density = 0.7 g/cm³

So, the density of the liquid is 0.7 g/cm³.

Answer:

h = 20.36[m]

Explanation:

To solve this problem we must calculate the perimeter (length of a circumference) of the circumference, which is denoted by the following equation:

L = 2*π*r

where:

r = radius = 0.9[m]

π = 3.1416

L = 2*(3.1416)*(0.9)

L = 5.654[m]

Now we know that the pulley or circumference had to rotate 3.6 times to get the water out of the well. In this way the depth of the well can be calculated by means of the following equation:

h = 3.6*L

h = 3.6*5.654

h = 20.36[m]

The hill does she travel before stopping is 97.5 m far along.

Apply law of conservation of energy.

Initial energy = Final energy

\(1/2 mv^2 = mgh\)

Here, m is the mass, u is the velocity, 9 is the gravitational acceleration, and his the height upto which woman will incline on the hill.

Rearrange the above equation for h.

\(h=v^2/ 2g\)

\(h = (10m/s)^2 / 2(9.8m/s2)\\h = 5.102m\)

This is the vertical height from the ground. Now, calculate the slant height of this point.

l = h / sin3°

l = 5.102m /  sin3°

= 97.5m

The law of conservation of energy means that the total amount of energy in a closed system remains constant over time, regardless of the transformations or transfers that occur within the system. This law is based on the principle of the first law of thermodynamics, which states that the total energy of a system and its surroundings is always conserved.

It has been experimentally verified in a wide range of physical phenomena, including chemical reactions, nuclear reactions, and mechanical processes. The law of conservation of energy has profound implications for our understanding of the physical world. It implies that energy is a fundamental quantity that is conserved in all physical processes, and it forms the basis of many important theories in physics and engineering.

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Answer:

In the given graph,

Velocity is constant between 4 to 8 which is 2m/s

So, at t=5s

Instantaneous velocity=2m/s

Explanation:

hope this help u thank u

Answer:

34.34 °C

Explanation:

From the question,

Heat lost by the silver block = heat gained by the iron block.

cm(x-y) = c'm'(y-z)................... Equation 1

Where c = specific heat capacity of the silver block, m = mass of the silver block, c' = specific heat capacity of the iron, m' = mass of the iron. x = initial temperature of the silver block, z = initial temperature of the iron,  y = final temperature of the mixture.

make y the subject of the equation

y = (cmx+c'm'z)/(cm+c'm')............... Equation 2

Given: c = 50 g, c = 0.2350 J/g·°C, x = 100°C, m' = 50 g, c' = 0.4494 J/g.°C, z = 0°C

Substitute these values into equation 2

y = [(50×0.2350×100)+(50×0.4494×0)]/[(50×0.2350)+(50+0.4494)]

y = 1175/(11.75+22.47)

y = 1175/34.22

y = 34.34 °C

Explanation:

In scientific notation the Sun's mass is: =1.989 x 10 ^30 kg

Answer:

I think in scientific notation the Sun's mass becomes: M Sun = 1.989 x 10 30 kg. The number above the ten, called the power of ten or exponent, stands for the number of decimal places. If it is positive, as in the mass of the Sun, the decimal places are in front of the decimal point.

I hope this help you!:)

To prepare a Greek salad, different types of cut must be used to cut these ingredients depending on the ingredient.

In culinary there are different types of cuts depending on the cooking or the presentation that you want to give the dish. For example, in the case of Greek salad, all the ingredients are required to be cut in such a way that the bites are suitable for the size of the mouth.

Therefore, the cutting technique for each ingredient is:

the Greek salad looks like the image below:

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Answer:

The answer to that is false

Answer:

False

Explanation:

Answer:

I believe the answer is B.

Explanation:

Newton's First Law of Gravity states, "The greater the weight (or mass) of an object, the more inertia it has. Heavy objects are harder to move than light ones because they have more inertia. "

The answer is D.

All objects travel at the same speed due to gravity.

I hope I helped! Sorry if my inference was incorrect.

Answer:

IVE BEEN TRYNA FIND THE ANSWER FOR THE PAST HOUR T-T

Explanation:

Answer:

3.2 x10^11 bits of storage

Explanation:

Answer:

Work = 300 J

Explanation:

\(W = Force*distance\\W = 20*15\\W = 300 J\)

Answer:

We conclude that the mass of a rock with a force of 500 N and an acceleration of 75 m/s² is 6.7 kg.

Hence, option D is correct.

Explanation:

Given

To determine

Mass m = ?

Important Tip:

Using the formula

\(F = ma\)

where

now substituting F = 500, and a = 75 m/s² in the formula

\(F = ma\)

\(500 = m(75)\)

switch sides

\(m\left(75\right)=500\)

Divide both sides by 75

\(\frac{m\cdot \:75}{75}=\frac{500}{75}\)

simplify

\(m=\frac{20}{3}\)

\(m=6.7\) kg

Therefore, we conclude that the mass of a rock with a force of 500 N and an acceleration of 75 m/s² is 6.7 kg.

Hence, option D is correct.

The duty cycle of a square wave with a frequency of 10 Hz and a positive pulse width (i.e., high time) of 0.03 seconds is 30%.

The duty cycle is defined as the percentage of time the waveform spends at the high voltage level. To calculate the duty cycle of a square wave, divide the high time by the total period, then multiply by 100. The duty cycle equation is as follows:Duty cycle (%) = (High time / Period) * 100Where,High time is the time duration when the waveform is at a high level.Period is the time duration between the beginning of two consecutive high levels. Frequency is the inverse of the period.The high time is 0.03 seconds, and the period is 1 / 10 = 0.1 seconds, using the frequency given. As a result, the duty cycle can be calculated:Duty cycle = (0.03 / 0.1) * 100 = 30%Thus, the duty cycle of a square wave with a frequency of 10 Hz and a positive pulse width (i.e., high time) of 0.03 seconds is 30%.

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Hi there!

We can use the power equation:
\(P = \frac{V^2}{R}\)

P = Power (W)
V = Potential Difference (V)
R = Resistance (Ω)

Rearrange to solve for Resistance:
\(R = \frac{V^2}{P} = \frac{220^2}{1477} = \boxed{32.769 \Omega}\)

1. The relationship between lightning and electricity was made clear by Franklin's experiment.2.  He submitted a plan for an experiment in which a lightning rod would be used to attempt to capture an electrical charge. 3,4. Some scientists and historians doubt this story because it's highly unlikely that lightning struck a key while Franklin was flying a kite because he would have most likely perished5. . Noone else try repeating this experiment

Do you think that Franklin actually performed this experiment?

The experiment was not carried out by Franklin to demonstrate the presence of electricity. Furthermore, it's highly unlikely that lightning struck a key while Franklin was flying a kite because he would have most likely perished.

He submitted a plan for an experiment in which a lightning rod would be used to attempt to capture an electrical charge in a "leyden jar," a container for storing electrical charges, proving that lightning was a type of electricity. Noone else try repeating this experiment.

Franklin established that lighting was an electrical discharge through the kite experiment and discovered that it could be charged into the ground over a conductor, offering a secure alternate route and reducing the possibility of fatal fires.

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Explanation:

According to newtons first law of motion " A body is at a state of rest or uniform motion unless acted upon by a force (external)" which will either

1. change the direction

2. change the acceleration

3. change the velocity(moves or stop the body from moving)

4. change the shape or size

Answer:

12N

Explanation:

Force = mass * acceleration.

6 * 2 = 12

Taking into account the Newton's second law, the force required to accelerate a 6 kg bowling ball at 2 m/s² forward is 12 N.

In first place, acceleration in a body occurs when a force acts on a body. There are two factors that influence the acceleration of an object: the net force acting on it and the mass of the body.

Newton's second law states that this force will change the speed of an object because the speed and / or direction will change. These changes in velocity are called acceleration.

So, Newton's second law defines the relationship between force and acceleration mathematically. This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object.

Mathematically, Newton's second law is expressed as:

F= m×a

where:

In this case, you know:

Replacing:

F= 6 kg× 2 m/s²

Solving:

F= 12 N

Finally, the force required to accelerate a 6 kg bowling ball at 2 m/s² forward is 12 N.

Learn more about the Newton's second law:

The horizontal force being applied by the partner is 692.8 N.

The horizontal force being applied by the partner is determined by applying Newton's second law of motion.

Mathematically, the Newton's second law of motion is given as;

F = ma

where;

The total weight of the trapeze artist can be resolved into horizontal component and vertical component.

The formula for the horizontal component of the weight of the trapeze artist is given as;

Fx = F cosθ

Wx = W cosθ

where;

Wx = ( 8 x 10² N ) x cos (30)

Wx = 692.8 N

Thus, the horizontal force applied by the partner is a function of the horizontal component of the weight of the trapeze artist.

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The elevator does 24,000 Joules of work in lifting a 600 N person over a distance of 40 meters.

To calculate the work done by an elevator in lifting a person, we can use the formula:

Work = Force × Distance × cos(θ)

Where:

Force = 600 N (the weight of the person)

Distance = 40 m (the vertical distance the person is lifted)

θ = 0 degrees (cosine of 0 is 1, indicating the force and distance are in the same direction)

Plugging in the values:

Work = 600 N × 40 m × cos(0°)

= 600 N × 40 m × 1

= 24,000 N·m

= 24,000 J (Joules)

Therefore, the elevator does 24,000 Joules of work in lifting a 600 N person over a distance of 40 meters.

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Adding DNA extraction or buffer solution is essential for the efficient isolation of DNA from cells and tissues, providing high-quality and pure DNA for downstream applications..

These solutions help to break open the cells and release the DNA. DNA extraction solutions can contain various chemicals such as salts, detergents, or organic solvents that can help to solubilize the cellular membranes and proteins and degrade them so that DNA can be easily isolated. The buffer solution also helps to maintain a stable pH environment to prevent DNA from degrading during extraction.

DNA extraction is crucial for several applications such as PCR, sequencing, cloning, and genetic analysis. The quality and purity of the extracted DNA can significantly affect the downstream applications, and the use of the correct extraction and buffer solutions can ensure that DNA is not degraded, fragmented, or contaminated with other cellular components. In summary, adding DNA extraction or buffer solution serves several purposes in molecular biology, such as it is essential for the efficient isolation of DNA from cells and tissues, providing high-quality and pure DNA for downstream applications.

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Answer:

It looks like its moving north.

Explanation:

The magnitude of the total velocity of the package at the moment it is thrown as seen by an observer on the ground is D = 193m/s  15.2s = 2934 m.

What is velocity ?

velocity is the prime indicator of the position as well as the rapidity of the object

Sol-

1. 0.5gt^2 = 2010 m.

4.9t^2 = 2010.

t = 20.3 s. = Fall time.

D = Xot. = 193m/s 20.3s = 3909 m.

2. V=sqrt(Xo^2+Yo^2)=sqrt(193^2+58^2) = 202 m/s.

3. Vot + 0.5gt^2 = 2010 m.

58t + 4.9t^2 = 2010.

4.9t^2 + 58t - 2010 = 0.

Use the  quadratic formula we are get  

t = 15.2 s. = Fall time

D = 193m/s  15.2s = 2934 m.

D = 193m/s  15.2s = 2934 m.

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At 30 degrees Celsius, a saturated solution of KClO3 will contain approximately 24 grams.

Solution: Plagiarism is the act of taking someone else's work or ideas and passing them off as your own. It is an unethical practice and is considered an academic offense. To avoid plagiarism, it is important to properly cite any sources that are used, including quotes, facts, images, and any other type of borrowed material. Additionally, it is important to give credit to the original authors of any ideas or works that are used. It is also recommended to paraphrase or re-word any material that is borrowed, so that it is not presented in the same exact form as the original. By following these steps, you can ensure that your work is completely plagiarism-free.

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The color of visible light that would have the least energy is red. On the other hand, the color of visible light that would have the most energy is violet.

This is because red light has the longest wavelength and the lowest frequency out of all the colors in the visible spectrum. Violet light has the shortest wavelength and the highest frequency out of all the colors in the visible spectrum.

This relationship between wavelength, frequency, and energy can be explained by the relationship between electromagnetic waves and energy. All electromagnetic waves, including visible light, have a certain amount of energy that is proportional to their frequency. The higher the frequency, the more energy the wave has.

This relationship can also be seen in the electromagnetic spectrum, where higher energy waves (such as X-rays and gamma rays) have shorter wavelengths and higher frequencies, while lower energy waves (such as radio waves) have longer wavelengths and lower frequencies.

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Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. ... Velocity is the rate at which the position changes. The average velocity is the displacement or position change (a vector quantity) per time ratio.

Answer:

The answer is C because there is no friction there will be no friction force only applied and since its on ice you have to account for gravity

Explanation:

Answer:

c

Explanation:

c

The initial speed of Car A when Car B is waiting to turn left is 15.9 m/s. After hitting, Cars A and B travel at speeds of 9.1 m/s.

The law of conservation of momentum is defined as the momentum being conserved before and after the collisions. The momentum of the entire system remains constant. Momentum is defined as the product of speed with direction and mass.

From the given,

the collision is inelastic and hence the law of conservation of momentum is, m₁u₁ + m₂u₂ = (m₁+m₂)v

m₁ (mass of Car A) = 2000 kg

m₂(mass of Car B) = 1500 Kg

The initial momentum of Car A(u₁) =?

The initial momentum of Car B(u₂) = 0 (Car B is waiting to take a left turn and hence its velocity decreases and becomes zero)

The final momentum of both cars A and B =9.1 m/s

m₁u₁ + m₂u₂ = (m₁+m₂)v

2000×X + 1500×0 = (2000+1500)×9.1

2000X = 3500×9.1

X = 15.9 m/s

Thus the initial speed of car A is 15.9 m/s or 16 m/s.

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Answer:

wind power can be tracked back to sunlight since sunlight is one of the causes of moving air which is wind .

High temperature causes air to expand causing it to spread over a wider area decreasing it's pressure compared to places of lower temperature which causes air to contract causing a concentration of air molecules which increases its pressure . This two processes causes a pressure difference which leads to movement of air (wind) whose energy can be used to generate wind power.

Wildfire occurrence and intensity can be influenced by three natural phenomena: droughts, strong winds, and low humidity. Heat waves can produce hot, dry conditions that make it simpler for fires to start and spread.

Natural factors including volcanic eruptions, ocean currents, changes in the Earth's orbit, oscillations in the sun, and internal variability affect and vary the temperature of the planet.

When high pressure in the atmosphere sweeps in and forces warm air towards the ground, heat waves start to develop. As the air is compressed, it continues to warm up, making us feel much hotter. The ground's high pressure area grows upward.

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