Which TWO of the following examples are a chemical reaction?
A melting ice
B breaking glass
C crumpling paper
D rusting iron
E burning wood

The order in which the objects arrive at the bottom of the incline depends on their moment of inertia and their shape. The objects with the smallest moment of inertia will arrive at the bottom first. The shapes are different, then the order will depend on the moment of inertia of each object.

The moment of inertia of a hoop is given by I = M\(R^{2}\),

where M is the mass of the hoop and R is its radius.

The moment of inertia of a uniform solid cylinder is given by I = (1/2)M\(R^{2}\),

where M is the mass of the cylinder and R is its radius.

The moment of inertia of a spherical shell is given by I = (2/3)M\(R^{2}\),

where M is the mass of the shell and R is its radius.

The moment of inertia of a uniform solid sphere is given by I = (2/5)M\(R^{2}\),

where M is the mass of the sphere and R is its radius.

Therefore, the order in which the objects arrive at the bottom of the incline from fastest to slowest is: hoop, solid cylinder, spherical shell, solid sphere. This order is not affected by the masses and radii of the objects, as long as they are all of the same shape. However, if the shapes are different, then the order will depend on the moment of inertia of each object.

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The fraction of the neutron's kinetic energy transferred to the atomic nucleus is 2.05

If the initial kinetic energy of the neutron is

4.2 × 10−13 J, its final kinetic energy  will be 2.50 joules

kinetic energy of an object is described as the energy that it possesses due to its motion which is also the work needed to accelerate a body of a given mass from rest to its stated velocity.

In elastic head-on collision, the energy of the system and total momentum is conserved.

For the neutron,

m - mass

Vi - initial velocity

Vf - final velocity

For the atom ,

M- mass

Mi - initial velocity

Mf - final velocity

Conserved momentum on the head-on collision

mvi = mvf + MVF

vi - vf = MmVf

Vi- vf = 11.1 vf...... (i)

The kinetic energy is

Vi²- vf² = 11.1 v²f.......(ii)

Combining both equations

Vi + Vf = Vf

Solve equation (I) and (III) for Vi

vi = 5.4vf

Now, the fraction of the neutron's kinetic energy transferred to the atomic nucleus,

1/2 mv²f/ 1/2 mv²i = 11.1/ 5.4

If the initial kinetic energy of the neutron is

4.2 × 10−13 J, its final kinetic energy  will be 2.50 joules

Hence, we can conclude that the fraction of the neutron's kinetic energy transferred to the atomic nucleus is 2.05

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Answer:

6.72 m/s

Explanation:

recall that the equations of motion may be expressed as

v² = u² + 2as

where,

v = final velocity,

u = initial velocity = 0 m/s because it is stationary before it starts falling

a = acceleration (in this case because it is falling, it is the acceleration due to gravity = 9.81 m/s²)

s = distance traveled = 2.3m

in our case, if we neglect air resistance, then we simply substitute the known values above into the equation of motion.

v² = u² + 2as

v² = 0² + 2(9.81)(2.3)

v² = 45.126

v = √45.126

v = 6.72 m/s

To determine which operations would increase the angular magnification of a refracting telescope, let's first understand that the angular magnification (M) is given by the ratio of the focal length of the objective lens (f_obj) to the focal length of the eyepiece (f_eye): M = f_obj / f_eye.

To increase the angular magnification, we can either increase the focal length of the objective lens or decrease the focal length of the eyepiece.

a: Increase the focal length of the objective lens - This would increase M, so it's a correct choice.
b: Increase the focal length of the eyepiece - This would decrease M, so it's not a correct choice.
c: Decrease the focal length of the objective - This would decrease M, so it's not a correct choice.
d: Decrease the focal length of the eyepiece - This would increase M, so it's a correct choice.
e: Increase the focal length of both the objective lens and the eyepiece by the same factor - This would not change M, so it's not a correct choice.

So, the correct answers are a and d. Your final answer should be "ad."

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Explanation:

Cultural Ecosystem Services (CES) are the non-material benefits people obtain from nature. They include recreation, aesthetic enjoyment, physical and mental health benefits and spiritual experiences. They contribute to a sense of place, foster social cohesion and are essential for human health and well-being.

Answer:

Extrusive rocks form on the Earth's surface from lava, which is magma that has risen from underground. Intrusive rocks are formed when magma cools and solidifies within the planet's crust.

That's the difference

Each image was focused on the retina because the sclera altered the lens's shape, which also altered its focal length.

The retina is the tissue layer at the rear of the eyeball that is light-sensitive. The retina receives the images that pass through the eye's lens. The retina subsequently transforms these images into electric signals, which it then transmits to the brain via the optic nerve. Within the eye, the retina is a layer of photoreceptor and glial cells that collects incoming photons and transfers them through neural pathways as electrical and chemical signals so the brain may see a visual image. tissue that is sensitive to light and lines the back of the eye. It has millions of photoreceptors, including rods and cones, which change light rays into electrical impulses and transmit those signals to the brain via the optic nerve.

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Answer:

During winter time the northern hemisphere leans away from the sun due to the rotation of earth and due to this change the sunlight is not direct on these areas instead it is spread and due to this the shadows are longer and the sunlight is not intense. The earths rotation around the sun causes the seasons to change and that is why we experience shorter hours of daytime.

Explanation:

During winter time the northern hemisphere leans away from the sun due to the rotation of earth and due to this change the sunlight is not direct on these areas instead it is spread and due to this the shadows are longer and the sunlight is not intense. The earths rotation around the sun causes the seasons to change and that is why we experience shorter hours of daytime.

It takes approximately 66.56 seconds for the worker producing 160 watts of power to do 10,650 joules of work.

Power is the rate at which work or energy is done per unit of time. It is a measure of how quickly energy in a mechanism is transformed or transferred.

Power is defined mathematically as Power = Work / Time or Power = Energy / Time.

We can use the formula:

time = work / power

where work is the amount of work done in Joules, power is the amount of power being produced in Watts, and time is the time it takes to do the work in seconds.

Plugging in the given values, we get:

time = 10,650 J / 160 W

= 66.56 s (rounded to two decimal places)

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The block has a mass of 0.86kg.

By using the theory of energy conservation, we may resolve this:

\(U+K=U_{f}+ K_{f}\)

The act or process of shifting or altering one's location or position; motion. power of motion, similar to a living creature. the way the body moves when walking; gait. a physical gesture, such as a shift in posture.

Motion is the free rotation of a body with regard to time. For instance, a moving car, a ball rolling around, the fan, dust blowing off the carpet, water flowing from the faucet, etc. Even the universe is always moving.

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In the theory of tension, F = T describes the strength of the downward force acting on section a. Tension is used to describe this.

It is expressed as a Newton (N) or Kg m/s2 articulation. The centre of mass of the body is where the force of gravity passes through and always acts downward. Actually, the force of gravity is a type of pull that the earth applies to a body as it moves toward its centre.

The force communicated through a rope, string, or wire when two opposing forces draw on it is known as tension. The tension force draws energy equally on the bodies at the ends and is applied along the length of the wire.

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The stopping distance of the car, considering a reaction time of 0.50 seconds and a deceleration rate of 6.0 m/s², is approximately 52 meters.

To calculate the stopping distance of the car, we need to consider two factors: the distance covered during the driver's reaction time and the distance covered while the car decelerates.

Distance during the reaction time:

The car is traveling at 28 m/s. In 0.50 seconds, the car will cover a distance equal to its initial velocity multiplied by the reaction time:

Distance = Velocity × Time

Distance = 28 m/s × 0.50 s

Distance = 14 meters

Distance during deceleration:

The car decelerates at a rate of 6.0 m/s². To calculate the distance covered during deceleration, we can use the following formula:

Distance = (Velocity² - Initial Velocity²) / (2 × Acceleration)

Where:

Velocity = Final velocity = 0 m/s (since the car stops)

Initial Velocity = 28 m/s

Acceleration = -6.0 m/s² (negative because the car is decelerating)

Plugging in the values, we get:

Distance = (0² - 28²) / (2 × -6.0)

Distance = (0 - 784) / (-12)

Distance = 784 / 12

Distance ≈ 65.33 meters

Total stopping distance:

To find the total stopping distance, we add the distance covered during the reaction time to the distance covered during deceleration:

Total Stopping Distance = Distance during Reaction Time + Distance during Deceleration

Total Stopping Distance = 14 meters + 65.33 meters

Total Stopping Distance ≈ 79.33 meters

Therefore, the stopping distance of the car, considering a reaction time of 0.50 seconds and a deceleration rate of 6.0 m/s², is approximately 79.33 meters.

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True. A conductor meeting the definition of a covered conductor is not considered an insulated conductor.

A covered conductor refers to a conductor that has a protective covering or insulation layer around it. However, this insulation is typically not sufficient to meet the requirements for full electrical insulation. Therefore, a covered conductor does not meet the criteria of being considered an insulated conductor.

The purpose of the covering or insulation on a covered conductor is primarily to provide mechanical protection and reduce the risk of accidental contact with the conductor. It may provide some degree of electrical insulation, but it is not designed or intended to provide complete electrical isolation. In contrast, an insulated conductor refers to a conductor that has been specifically designed and manufactured with a suitable insulation material to provide a high level of electrical insulation.

Insulated conductors are used in various electrical applications to ensure safe and reliable electrical connections. Therefore, a conductor meeting the definition of a covered conductor, although it has some form of protective covering, does not meet the criteria for being classified as an insulated conductor.

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Answer:

C

Explanation:

because it's new chemical substances

The distance traveled by the sprinter in meters is determined as 1.88 m.

The acceleration of the sprinter is the rate of change of velocity of the sprinter with time.

The acceleration of the sprinter is calculated as follows;

Apply Newton's second law of motion as follows;

F = ma

a = F/m

where;

a = 693 N / 64 kg

a = 10.83 m/s²

The distance traveled by the sprinter is calculated as follows;

s = ut + ¹/₂at²

where;

s = ¹/₂at²

where;

s = (0.5)(10.83)(0.59²)

s = 1.88 m

Thus, the distance traveled by the sprinter in meters is determined as 1.88 m.

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An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision. Both momentum and kinetic energy are conserved quantities in elastic collisions. ... They collide, bouncing off each other with no loss in speed.

Answer:

1000000.

Explanation:

We need more 50 g of KNO3

Solubility is the ability of a substance to dissolve in a solvent (usually a liquid) to form a homogeneous solution. It is a property of a substance and can be defined as the maximum amount of a substance that can dissolve in a given amount of solvent at a specified temperature and pressure.

The solubility of the KNO3 at this temperature is 80 g/100 g water. If we have already 3og of the solute then we need an extra 50 g to make a saturated solution.

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Pressure = Force / area

m= mass = 17.3 kg

g= gravity = 9.8 m/s^2

Force = m * g = 17.3 kg * 9.8 m/s^2 = 169.54 N

P = F / A

A = area = 1.44^2 = 2.0736 m^2

P = 169.54 N/ 2.0736 m^2 = 81.76 Pa

ANSWERS

a. 635.26 Hz

b. 673.23 Hz

c. 597.87 Hz

d. 562.14 Hz

EXPLANATION

a. In this case, the source is the train moving toward the station. The frequency of the source, fs = 616 Hz, the velocity of the source is vs = 10.4 m/s. The "observer" is the people in the station and we can assume that they are at rest, so the velocity of the observer, vo, is 0 m/s.

We have to find what is the frequency that the observer gets,

In this formula, v represents the velocity of sound, v = 343 m/s.

The frequency heard by the observer is,

Hence, a frequency of 635.26 Hz is heard at the station.

b. This is a different case because the observer is now another train, moving toward the station in the opposite direction - which means that the observer is moving toward the source, and it does it at 20.5 m/s. We also have to find the frequency heard by the observer,

Replace with the known values: v = 343 m/s, vo = 20.5 m/s, vs = 10.4 m/s, fs = 616 Hz,

Hence, the other train hears a frequency of 673.23 Hz

c. Now the velocity and frequency of the source are the same, but instead of moving toward the observer, it is moving away from it. The equation changes to,

Hence, the frequency heard at the station will be 597.87 Hz.

d. Again, this case is similar to part b, but in this case, the source and the observer are both moving away from each other, so the equation changes to,

Hence, the other train will hear a frequency of 562.14 Hz.

Answer:

16m + 25m + 16m = 57m

the car travelled 57 m

Explanation:

here's the answer, shouldn't be too hard to get the rest now!

4. f

5. t

6. t

7. t

8. f

9. t

10. f

The thing to do here is to balance the eqns that is to balance the stoichometric ratios or coefficients of the cpds.

hope you understand. all the best.

Answer:

Explanation:

First of all, I used the specific heat of water as 4182 J/(kgC) and the specific heat of ethyl alcohol (EtOH) as 2440 J/(kgC); that means that we need the masses in kg, not g.

120.g = .1200 kg of ethyl alcohol. Now for the formula:

\(t_f=\frac{(m_{H2O}*spheat_{H2O}*temp_{H2O})+(m_{EtOH}*spheat_{EtOH}*temp_{EtOH})}{(m_{H2O}*spheat_{H2O})+(m_{EtOH}*spheat_{EtOH})}\) where spheat is specific heat.

Filling that horrifying-looking formula in with some values:

\(16.0=\frac{(x*4182*20.0)+(.1200*2440*10.0)}{(x*4182)+(.1200*2440)}\) and

\(16.0=\frac{83640x+2928}{4182x+292.8}\) and

16(4182x + 292.8) = 83640x + 2928 and

66912x + 4684.8 = 83640x + 2928 and

1756.8 = 16728x so

x = .105 kg and the amount of water added is 105 g

Answer:

Wave having a length of 9 meters and a height of 6 meters.

Explanation:

Assuming that this is a sound wave or an electromagnetic wave, we know that those have a constant speed.

The speed of sound and speed of light are the same for any sound or electromagnetic wave respectively.

And we also have the equation:

v = λ*f

Where:

v = velocity

f = frequency

λ = wavelength

And because v is a constant, we can write:

f = v/λ

Now the wavelength is in the denominator, then the wave with the smaller wavelength will be the one with a larger frequency.

The option with the smallest wavelength is

Wave having a length of 9 meters and a height of 6 meters.

Notice that the height of the waves is also given, this is actually related to the intensity of the wave, so that information does not affect this particular question.

Answer:

The weight of the box is 22.38 N.

Explanation:

The weight (W) of the mass is given by:

\( W = mg \)

Where:            

m: is the mass of the box = 6.0 kg

\(g_{m}\): is the acceleration due to gravity of mars

Since the acceleration due to the gravity of mars is 0.38 times that on Earth we have:

\(g_{m} = 0.38g_{E} = 0.38*9.81 m/s^{2} = 3.73 m/s^{2} \)

Hence, the weight of the mass is:

\( W = mg = 6.0 kg*3.73 m/s^{2} = 22.38 N \)

Therefore, the weight of the box is 22.38 N.

I hope it helps you!      

Answer:

The other end is called the south pole. When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another. This is similar to electric charges.

Explanation:

Answer: A magnet has two ends called poles the answer are the poles

North pole and South pole

Explanation:

plz mark brainliest

Answer:

Explanation:

mass of linebacker, m = 111 kg

initial velocity, u = 1.9 m/s

mass of quarterback, m' = 82 kg

initial velocity, u' = 3 m/s

(a) Let they are moving in the same direction, the velocity is v after collision.

Use conservation of momentum

m u + m' u' = (m + m') v

111 x 1.9 + 82 x 3 = (111 + 82) v

v = 2.4 m/s

Let they are moving in opposite direction, the velocity is v after collision.

Use conservation of momentum

m u - m' u' = (m + m') v

111 x 1.9 - 82 x 3 = (111 + 82) v

v = - 0.18 m/s

Answer:

The net force on the skater is zero. (\(F_{net} = 0\,N\))

Explanation:

According to Newton's First Law, an object is at equilibrium when either it is at rest or moves at constant velocity, which means a net force of zero. Based on the given statement, there are no external forces acting on skate and, therefore, the net force on the skater is zero. (\(F_{net} = 0\,N\))

The distance between the second and third dark lines of the interference pattern is 1mm.

Interference in physics is a phenomena when two waves merge by combining their displacements at each and every point in space and time to produce a new wave that has a higher, lower, or same amplitude.

The required distance= one fringe width

= ω = λ D/ d

= ( 600 × 10⁻⁹ ) ( 0.75 ) /0.45 × ( 10⁻³)

=(600×10⁻⁹)(0.75)/0.45×(10⁻³)

= 10 × 10⁻⁴

= 1mm.

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