what is the minimum coefficient of static friction is needed so that a 1000 kg car could take a turn (of radius

An example of a situation that would meet requirements for the first law of thermodynamics, but violate the second law is mentioned below.

The first law of thermodynamics states that energy can neither be created nor be destroyed. The second law of thermodynamics states that the entropy of the universe increases for a spontaneous process. The laws of thermodynamics are true and proved. So, the below scenarios are imaginary and not possible in real world.

Normally heat flows from warmer body to colder body until both the bodies are at same temperature. But is this process is spontaneously reversed, entropy will not increase. So, it is a violation of second law but first law is still true in this impossible process.

Therefore, an example of a situation that would meet requirements for the first law of thermodynamics, but violate the second law is mentioned above.

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Answer:

set A is showing the same position in both graphs

Answer:

B

Explanation:

The answer is B.

I'm positive it's B

Answer:

acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities. The orientation of an object's acceleration is given by the orientation of the net force acting on that object.

SI unit: m/s2, m·s−2, m s−2

Answer:

no

Explanation:

Answer:

O Intense rain or an earthquake

Explanation:

Landslides can be initiated in slopes already on the verge of movement by rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance by human activities, or any combination of these factors.

Intense rain or an earthquake can trigger a landslide.

In conclusion, intense rain or an earthquake can trigger a landslide.

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Answer:  

Explanation:

at first the rock is at rest so initial velocity is zero
after accelerating it reaches a final velocity
we are supposed to find that final velocity


\(v^{2} = u^{2} +2ax\)
v= final velocity
u= initial velocity
x= distance
a= acceleration

\(v^{2} = 0^{2} + 2(9.8)(14.4)\)
\(v^{2} = 282.24\)
\(v= \sqrt{282.24}\)
\(v= 16.8 m/s\)

Answer:

positive delta H (enthalpy/heat change)

temperatures drop

Explanation:

eg water changing state to ice is an endothermic reaction

Answer:

Some signs that an endothermic reaction is taking place are if:

- the container holding the reaction feels cold to the touch

- the change in enthalpy is positive

- the total heat of formation is positive

The frequency of light having a wavelength of 2.4 × \(10^{10}\) nm is 1.25 × \(10^{14}\) Hz. The wavelength of light with a frequency of 2.4 × \(10^{10}\) Hz is 1.25 ×\(10^7\)nm.

The frequency of light and its wavelength are related by the equation c = λν, where c is the speed of light, λ is the wavelength, and ν is the frequency.

For a wavelength of 2.4 × \(10^{10}\) nm:

c = λν

ν = c/λ = (3 × \(10^8\) m/s) / (2.4 × \(10^{10}\) nm) = 1.25 × \(10^{14}\) Hz

Therefore, the frequency of light with a wavelength of 2.4 × \(10^{10}\) nm is 1.25 × \(10^{14}\) Hz.

For a frequency of 2.4 × \(10^{10}\)  Hz:

c = λν

λ = c/ν = (3 × \(10^8\) m/s) / (2.4 × \(10^{10}\) Hz) = 1.25 × \(10^-2\) m = 1.25 × \(10^7\) nm

Therefore, the wavelength of light with a frequency of 2.4 × \(10^{10}\) Hz is 1.25 × \(10^7\) nm.

So the correct answers are:

The frequency of light having a wavelength of 2.4 × \(10^{10}\) nm is 1.25 × \(10^{14}\) Hz.

The wavelength of light with a frequency of 2.4 × \(10^{10}\) Hz is 1.25 ×\(10^7\)nm.

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Weight of the person = m*(g+a) = 932.2 N

Weight of the person = m*(g+a) = 774.2 N

Weight of the person = m*(g+a) = 695.2 N

A diagram or pictorial depiction that organizes the representation of data or values is known as a graph. The relationships between two or more objects are frequently represented by the points on a graph.

The four most common types of graphs are probably line graphs, bar graphs and histograms, pie charts, and Cartesian graphs. They are frequently and effectively used for a variety of purposes. You would use: Numbers that are unconnected to one another are displayed using bar graphs.

A) at 1 sec acceleration a = (4-0)/(2-0)

                                          \(= 2\ m/s^{2}\)

Weight of the person = m*(g+a)

                                    = 79*(9.8+2)

                                    = 932.2 N

B) at t = 4 sec

Acceleration a = 0

Weight of the person = m*(g+a)

                                   = 79*(9.8+0)

                                   = 774.2 N

C) at t = 8 sec

       a = (0-4)/(10-6)

         \(= -1 m/s^2\)

Weight of the person = m*(g+a)

                                    = 79*(9.8-1)

                                    = 695.2 N

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A truck accelerating at 0.0083 meters/second2 covers a distance of 5.8 ×\(10^4\) meters. If the truck's mass is 7,000 kilograms, the work done to reach this distance is 3.3× \(10^6\) joules.

The correct answer is option E.

To calculate the work done by the truck to cover a distance of 5.8 × \(10^4\)meters, we need to use the equation for work:

Work = Force × Distance

In this case, the force can be calculated using Newton's second law:

Force = mass × acceleration

Where:

Acceleration (a) = \(0.0083 meters/second^2\)

Distance (d) = 5.8 ×\(10^4\) meters

Mass (m) = 7,000 kilograms

First, let's calculate the force exerted by the truck:

Force = mass × acceleration = (7,000 kg) ×\((0.0083 meters/second^2)\)= 57.1 Newtons

Next, we can calculate the work done:

Work = Force × Distance = (57.1 N) × (5.8 × 10^4 meters) = 3.3158 × \(10^6\)joules

Rounded to the nearest significant figure, the work done by the truck is approximately 3.3 × \(10^6\) joules.

Therefore, the correct answer is E.

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The question probable may be:

A truck accelerating at 0.0083 meters/second2 covers a distance of 5.8 ×\(10^4\)meters. If the truck's mass is 7,000 kilograms, what is the work done to reach this distance?

A. 1.7 × \(10^6\) joules

B. 3.4 ×\(10^6\) joules

C. 5.6 × \(10^6\)joules

D. 6.8 ×  \(10^6\)joules

E. 3,3  ×\(10^6\)  joules

Accident: Get burned

Prevention: turn off the burner.

This question involves the concepts of momentum, speed, and mass.

The momentum of the car is "24960 N.s".

Momentum is defined as the quantity of motion contained in a body. Mathematically, it is defined as the product of the mass and speed of the object:

P = mv

where,

Therefore,

P = (1600 kg)(15.6 m/s)

P = 24960 N.s

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Karen wants to fit all her desired items for the road trip in the car trunk.

Karen is faced with the challenge of fitting all the items she wants to bring for her road trip into the trunk of her car.

This requires careful planning and organization to maximize the available space. She needs to consider the size and shape of each item, as well as utilize packing techniques such as folding, stacking, and using storage containers efficiently. By strategizing and prioritizing her essentials, Karen can create a compact and secure arrangement of her belongings, ensuring safety during her journey.

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Answer:

The energy conversion is:

C) Chemical - - - - > Thermal.

An ulterior motive refers to a hidden or underlying reason behind someone's actions or behavior that may not be immediately apparent. Among the options provided, example C) "Becky went on a date with Rick because she hoped she'd get a free meal" is an example of an ulterior motive. Option C

In this scenario, Becky's motive for going on a date with Rick is not driven by genuine interest or connection but rather the expectation of receiving a free meal. Her primary intention is to benefit from the meal rather than building a meaningful relationship or enjoying the company of her date. The ulterior motive becomes evident as Becky's focus is more on the material gain rather than the interaction itself.

On the other hand, examples A) and B) do not demonstrate ulterior motives. In example A), Johan shares a web radio site with his co-worker Sandi because he genuinely believes she would enjoy it, without any hidden agenda. In example B), Brian selflessly shares his sandwich with Marco when he realizes Marco forgot his lunch, without any expectation or hidden motive.

Example D) does not involve an ulterior motive either. Jerome's act of picking up litter and placing it in the trash may not have received acknowledgement or thanks, but the action itself does not suggest any hidden agenda or underlying motive. It can be seen as a selfless act of environmental responsibility.

In summary, ulterior motives involve hidden intentions or agendas that may not be immediately apparent. Among the given options, example C) is the one that exhibits an ulterior motive, as Becky's primary motive for going on a date is to obtain a free meal.

Option C

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Answer:

it took him exactly 2.3 seconds to fall down

Explanation:

No, the trendline equation does not necessarily intersect with the density you determined for pure water in experiment 1a using a buret.

The trendline equation, derived from a regression analysis, represents the overall trend or relationship between two variables in a data set. It provides a mathematical model that predicts or estimates the value of the dependent variable based on the independent variable(s). On the other hand, the density of pure water determined in experiment 1a using a buret is a specific value obtained through direct measurement. The density of pure water is typically known to be 1 g/mL or 1 g/cm³ at room temperature and atmospheric pressure.

While the trendline equation may describe the general trend in the data and can be used to make predictions, it does not necessarily intersect with the specific density value determined experimentally. This is because the trendline equation is based on statistical analysis and takes into account the overall relationship between the variables, whereas the experimentally determined density is a specific measurement. The trendline equation provides an estimation or prediction of density based on the independent variable(s) being studied, but it is not guaranteed to match the exact value obtained in the experiment. Therefore, the intersection of the trendline equation with the density determined for pure water in experiment 1a using a buret is not a necessary or expected outcome.

In conclusion, the trendline equation and the density determined for pure water in experiment 1a using a buret are two different concepts. The trendline equation represents the general trend in the data and provides an estimation or prediction of density, while the experimentally determined density is a specific value obtained through direct measurement. The intersection between the trendline equation and the specific density value is not a necessary or expected outcome.

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Answer:

P T V n

Initial: 730 mmHg; 298 K; 250 cm³; --

Final: 760 mmHg; 273 K; ?; --

Effect: ↑; ↓; ↓P ↓T; --

250 cm³ x 273 K/298 K x 730 mmHg/760 mmHg = 220 cm³

Explanation:

A deflecting telescope is one with a lens as its objective and no mirror.

A deflecting telescope is one that makes use of a single or more curved mirrors to reflect light and generate a picture. Mirrors, rather than lenses, are employed in reflecting telescopes to gather light. The light in a reflector passes from the telescope tube to the big concave primary mirror, which reflects the light up the tube to the smaller convex secondary mirror, which reflects the light in relation to the eyepiece. Because light is reflected back and forth rather than traveling in a straight line from one end of the telescope tube to the other, reflecting telescopes are shorter than refractors.

Here,

A deflecting telescope has a lens as its objective rather than a mirror.

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Answer:

0.048J/g°C

Explanation:

Given parameters:

Mass of Mercury  = 25g

Initial temperature  = 25°C

Final temperature  = 155°C

Amount of heat absorbed  = 455J

Unknown:

Specific heat capacity of mercury  = ?

Solution:

To solve this problem, we use the expression below:

      Q  = m x C  x Δt

Q is the heat absorbed

m is the mass

C is the unknown specific heat capacity

Δt is the change in temperature;

          455  = 25 x C x (155  - 25)

          455  = 25 x C x 130

             C  = 0.048J/g°C

Water turns from a liquid to a solid/liquid/gas when it evaporates. Ice can also evaporate. Sublimation is the transformation of solid ice into a gas (water vapour).

The right response is sublimation. Without passing through a liquid phase, sublimation is the transformation of a solid into a gaseous phase of matter. Deposition, which occurs when water vapour transforms straight into ice, such as in snowflakes and frost, is the reverse of sublimation.

A specific amount of solid ice will have a smaller volume when it transforms into liquid water because melting ice produces denser water.

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Answer:

While there is no such thing as 100 percent safe, having nuclear energy is much safer than you think. It's thousands of times safer than conventional coal and other fossil-fuel-derived energy, not to mention the specter of environmental disaster from continued use of carbon-based energy sources.29 may. 2011

Explanation:

I hope it helps you

Hi there!

Ignoring friction, we know that the centripetal force experienced by the car is due to the normal force exerted by the road.

We can do a summation of forces in both the horizontal and vertical directions.

Vertical:
\(W = Mg\), force due to gravity

\(Ncos\theta\), VERTICAL component of the normal force.

\(\Sigma F_y = Ncos\theta - Mg\\\\Mg = Ncos\theta\)

Horizontal:
\(Nsin\theta = F_{Hnet}\)

The net horizontal force is equivalent to the centripetal force:
\(Nsin\theta = \frac{mv^2}{r}\)

We can solve for theta by dividing:

\(\frac{Nsin\theta = \frac{mv^2}{r}}{Ncos\theta = mg}\)

Simplify:

\(tan\theta = \frac{ \frac{v^2}{r}}{ g}\\\\tan\theta =\frac{v^2}{rg}\)

Solve:

\(\theta = tan^{-1}(\frac{v^2}{rg}) = tan^{-1}(\frac{30^2}{(1000)(9.8)}) = \boxed{5.26^o}\)

Answer:

Explanation:

Particles of a solid are closely packed, and  when a solid is hit to produce a sound the kinetic energy present in the solid will cause the particles to vibrate vigorously in the intermolecular spaces in the solid, whereas the paticles of liquids and gases are rather further apart therefore having large intermolecular spaces between particles.

A technique that can be used to provide information about the angles of a joint as part of a total motion pattern is called Electrogoniometry.

In physiotherapy, both a universal goniometer and an electro-goniometer are used to measure joint range of motion. The active knee extension test is used to evaluate hamstring shortening in patients suffering from chronic low back pain. The purpose of this study was to evaluate the reliability of universal goniometers and electro-goniometers in assessing knee "Angle" during an active knee extension test.From 2016 to 2017, 45 patients with chronic low back pain and short hamstring muscles were sent to the Kermanshah University of Medical Sciences clinic for an intra-examiner reliability study between three assessments of knee extension angle. During an active knee extension test, the knee extension angle was measured three times using a universal goniometer and an electro-goniometer.One competent physiotherapist measured the knee extension angle at the beginning, middle, and finish of a single session.

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Answer:

Density of the mixture = 855.56kgm-3

Explanation:

Density = Mass / Volume

Volume of Liquid X = 0.5m³

Density of Liquid X = 900kgm-3

Mass of Liquid X = Density × Volume

= 900kgm-3 × 0.5m³ = 450kg

Volume of Liquid Y = 0.4m³

Density of Liquid Y = 800kgm-3

Mass of Liquid Y = Density × Volume

= 800kgm-3 × 0.4m³= 320kg

As X and Y are mixed, we add their masses and volumes together:

Mass = 770kg

Volume = 0.9m³

Now we can find the density of the mixture:

Density = 770kg / 0.9m³ = 855.56kgm-3 (rounded to the 2nd decimal)

We should position the metre scale along the item such that the zero mark of the metre scale aligns with one end of the object if we want to measure an object's length using metres. The length of the object will then be revealed by the reading on the scale's opposite end.

A foot or so distant or close enough to read a ruler, stand in front of a mirror. The 0 on a plastic ruler should be positioned in the centre of your pupil when you hold it vertically against the frame. The bottom edge of the lens, not the frame's edge, should be measured from the middle of your pupil. Keep track of each eye's height.

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The magnitude of force exerted on the woman by the floor when the lift is accelerating is 150 Newton.

Given the following data:

To calculate the force exerted on the woman by the floor when the lift is accelerating, we would apply Newton's Second Law of Motion:

Mathematically, Newton's Second Law of Motion is given by this formula;

\(Force = mass \times acceleration\)

Substituting the given parameters into the formula, we have;

\(Force = 60 \times 2.5\)

Force = 150 Newton.

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Answer:

Explanation:

Definition: Noise pollution is generally defined as regular exposure to elevated sound levels that may lead to adverse effects in humans or other living organisms.

Measures to be taken:

Explanation:

interesting let's see it is very confusing

Answer:

See below

Explanation:

Motion as the change of position of an object with respect to time.

Uniform motion covers equal distance at an equal time interval. The velocity is constant. For example, a car traveling at 55 mph constant speed for 2 hours has uniform motion

Non-uniform motion covers unequal distance at equal time intervals. For example, in heavy traffic, a car may travel at 20mph for the first 10 minutes, then 10mph for the next 10 minutes etc. Thus velocity changes over equal time periods