Two substances at different temperatures are brought together and allowed to reach thermal equilibrium. Substance B has a specific heat capacity that is four times that of substance A. The mass of substance A is two times the mass of substance B.
Which statement best describes the final temperature of the two substances after they are allowed to reach thermal equilibrium?
A)The final temperature will be midway between the initial temperatures of the two substances.
B)The final temperature will be closer to the initial temperature of substance B.
C)The relative final temperature cannot be determined based on the information given.
D)The final temperature will be closer to the initial temperature of substance A.

From the given list, let's determine the given qualitative information.

Qualitative data can be said to be data that are represented without determining a value.

This type of data are uncountable.

It is data that can be observable in nature and they cannot be measured.

From the given list, the qualitative data is blue sky.

Other information given are that of quantitative data because they are measured values.

Therefore, the qualitative information is blue sky.

ANSWER:

D. Blue sky

Answer:

It is safer to endure an explosion on land rather than in water. So it is better to take cover on lanad.

The physically reasonable situation is the one where the magnetic force F is perpendicular to both the velocity v and the magnetic field B, following the right-hand rule.

Since the velocity is directed to the right and the magnetic field is directed out of the screen toward you, the force should be directed either up or down. Based on the given information, it's not possible to specify which drawing is correct without visual references. Please provide more details or the drawings to help you identify the correct situation.

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The required amplitude of the oscillation when mass, spring constant and total energy are specified is calculated to be 14 cm.

The mass of the spring is provided as 0.5 kg.

Spring constant is given as 330 N/m.

Total energy of the oscillation is given to be 3.24 J.

The spring only possesses potential energy of its oscillation.

1/2 k x² = 3.24

where,

x = A, the spring's extension equals its amplitude

k is spring constant

Putting in the values into the equation,

⇒ 1/2 k A² = 3.24

⇒ k A² = 6.48

⇒ A² = 6.48/330 = 0.0196

⇒ A = 0.14 m

Converting metres to centimetres, we have,

⇒ 0.14 m = 14 cm

Therefore, 14 cm is determined to be the necessary oscillation's amplitude.

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Answer:

75mph

Explanation:

you multiply 33.528 by 2.237.

Answer: Science is involved in cooking, eating, breathing, driving, playing, etc. The fabric we wear, the brush and paste we use, the shampoo, the talcum powder, the oil we apply, everything is the consequence of advancement of science. Life is unimaginable without all this, as it has become a necessity.

Explanation:

Answer:

Science is at work in almost every part of our lives from the computer we use to the foods that we consume. For example take the yellow corn that we are use to eating it is actually a result of bio-agriculture.

Explanation:

Answer:

The Sun transfers in each second and amount of 1367J per square meter, so in hour it can transfer:

E = 60*60*1367 J/h*m2 = 4,921,200 J/h*m^2.

in one year, we have 3000h*4,921,200 J/h*m^2. = 14,763,600,000 Joules per square meter.

Now, only 20% of this can be used as energy, so the amount that can be used is:

E = 0.2* 14,763,600,000 J/m^2 = 2,952,720,000 J/m^2

Now, we want to find the number X of square meters such:

X*2,952,720,000 J/m^2 = 4x10^11 J

X = ( 4x10^11 J)/(2,952,720,000 J/m^2) = 135.5 m^2

So you only need around 135.5 square metters per house.

Answer:

Compression

Explanation:

I would think it would be compression because you are compressing the marshmallow, and pushing it down until its compact.

Answer: Compression, I to had to get an answer for this but imma help you out :)

Answer:

force on brake shoes is 10 N

Explanation:

for the master cylinder;

force applied = 140 N

diameter = 14d

for brake cylinder;

force applied on the brake shoe by the brake cylinder f = ?

diameter = d

The pressure will be transmitted undiminished from the master cylinder to the brake cylinder according to pascals pressure law.

pressure = force/area

but cross sectional area is proportional to diameter of the cylinder

therefore

\(\frac{140}{14d } = \frac{f}{d }\)

the diameters will cancel out, and we're left with

force on brake shoes = 10 N

Answer:

Explanation:

The answers are Static electricity, gravity, and magnetism.

Static electricity:

This force is very similar to gravitational force, the main difference being that gravitational force acts between masses, and electrostatic force acts between two charged bodies.

This force can be generated by rubbing the comb against clothing and then holding it close to tiny pieces of paper. You can watch the pieces of paper standing on their ends being attracted to the comb.

Gravity:

Gravitational force is a type of attractive force that exists between all bodies of mass, and the gravitational force of the sun keeps the sun and all the other planets of the solar system in a fixed orbit. Gravitation force is not required to be contacted to excerpt its downward force.

Magnetism:

Remember that if you push the ends of the magnet together, the other magnet will bounce off due to the magnetic force. It is also responsible for attracting iron with the force of magnets. The magnetic force of a magnet decreases as the distance between magnets increases.

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During a time of reverse polarity, the Earth's magnetic field flips such that the magnetic North Pole becomes the magnetic South Pole, and vice versa.

This means that the north-seeking end of a magnet, such as a compass needle, will point towards the newly established magnetic South Pole, rather than the magnetic North Pole as it does today.

It's worth noting that the Earth's magnetic field has undergone many reversals throughout its history, with the most recent one occurring about 780,000 years ago. However, scientists cannot predict when the next reversal will occur, as it is a natural and unpredictable process.

So, if a magnet were used during a time of reverse polarity, the north-seeking end of the magnet would point towards the newly established magnetic South Pole of the Earth, rather than the magnetic North Pole. This means that a compass needle would point southwards rather than northwards.

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Answer:

ITS 20

Explanation:

Answer:

a)15m/s

b)7.5m/s

Explanation:

a)use the formula for acceleration

b)calculate distance then calculate speed

Answer:

nuclear

Explanation:

A: a type of mechanical energy is kinetic, which comes from velocity/movement

C: people produce heat

D: converting food energy into usable energy within the body

The strength coefficient has the same value as the yield strength under the circumstances when the material exhibits perfect plastic behavior.

The strength coefficient and yield strength are parameters used to describe the mechanical behavior of a material under load. The strength coefficient, often denoted as K, represents the material's ability to resist deformation and is typically determined through experimental testing. On the other hand, the yield strength is the stress level at which permanent deformation or yielding of the material begins.

In materials that exhibit perfect plastic behavior, the deformation is entirely plastic, meaning there is no elastic deformation and the material deforms permanently without springing back to its original shape. Under these circumstances, the strength coefficient and yield strength have the same value because the material's resistance to deformation is consistent throughout the plastic region.

However, it's important to note that many materials do not exhibit perfect plastic behavior. They may undergo some degree of elastic deformation before yielding, and their deformation characteristics may vary across different stress levels. In such cases, the strength coefficient and yield strength will typically have different values.

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The electric field due to charge q1 and q2 at the middle point of the line joining the charges q1 and q2 is 8.64*10^(4) N/C.

Note: You have not given the point where the resultant magnetic field has to be calculated. Most probably it is asked to find the electric field at the middle point of the line joining the point charges.

Electric field: The electric force exerted on a unit charge is called the electric field. Electric field due to a charge is calculated using the formula,

E=kq/r^2

where k is a constant whose value is 9*10^(9) N m^2/ C^(2), q is the charge and r is the distance from the charge to the point where the electric field has to be calculated. In the given case, the electric field has to be calculated at the middle point of the line joining charges q1 and q2.

Calculation of electric field due to charge q1:

Given that q1=+12 nC or q1=+12*10^(-9) C and the distance of the charge q1 from the center d1=10.0/2 cm or d1=5*10^(-2) m, the magnitude of the electric field E1 due to charge q1 is,

E1=kq1 /d1^(2)

E1=9*10^(9)*12*10^(-9) / (5*10^(-2))^2

E1=4.32*10^(4) N/C

The direction of the electric field E1 at the middle point is towards the negative charge.

Calculation of electric field due to charge q2:

Given that q2=-12 nC or q1=-12*10^(-9) C and the distance of the charge q2 from the center d2=10.0/2 cm or d2=5*10^(-2) m, the magnitude of the electric field E2 due to charge q2 is,

E2=kq2 /d2^(2)

E2=9*10^(9)*12*10^(-9) / (5*10^(-2))^2

E2=4.32*10^(4) N/C

The direction of the electric field E2 at the middle point is towards the negative charge.

Total electric field:

The total electric field is given by the addition of the electric field. The direction of the electric field is the same for both charges, hence total electric field E is,

E=E1+E2

E=4.32*10^(4) +4.32*10^(4)

E=8.64*10^(4) N/C

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Answer:

Option D. 4.4 m/s²

Explanation:

The following data were obtained from the question:

Velocity (v) = 21 m/s

Radius (r) = 100 m

Centripetal acceleration (a) =.?

The centripetal acceleration of the car can be obtained as follow:

Centripetal acceleration (a) = Velocity square (v²) / radius (r)

a = v²/r

a = 21²/100

a = 441/100

a = 4.41 ≈ 4.4 m/s²

Therefore, the centripetal acceleration of the car is 4.4 m/s².

A spring of force constant 120 N/m acted up by a constant force of 240N. Then, the elastic potential energy stored in the spring is 240 Nm.

The elastic potential energy stored in the spring is formulated as follows

                                                 PE = ½kx²

Where PE is the elastic potential energy, x is the displacement of the spring from its equilibrium position, and k is the spring force constant.

In this question, the spring force constant is 120 N/m, and the constant force acting on the spring is 240 N. To find the spring displacement, we can use the formula:

F = kx

Where F is the force acting on the spring, x is the displacement, and k is the force constant,

So that:

F = kx

240 N = 120 N/m . x

x = 240 N/120 N/m

x = 2 m

Once x is known, then we can calculate the potential energy of the spring:

PE = ½kx²

PE = ½ (120) (2²)

PE = 60 x 40

PE = 240 Nm

So, the elastic potential energy stored in the spring is 240 Nm.

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The satement is true.

This comes from the fact that, according to Einstein:

and since c² is a very large number then, if we find a way to convert all the mass in energy a small amount will produce a large amount of energy.

When a ball is hit at an angle to the horizontal, the ball has two motions going for it concurrently: the first and simpler one is the constant-speed horizontal motion; the other is the vertical constant-acceleration motion. To investigate the motion of the ball, we use kinematic equations based on Newton's laws.

Answer:

We know that a solar electrical panel converts sunlight to electricity by means of solar cells and then, the electricity can be used as any electrical current.

I am not familiar with solar heating panels but assume that a liquid is heated by sunlight and then circulated thru the area that needs heating - it converts heat from sunlight to usable heat. The heat energy could also be stored and delivered at a different time (accumulated during the day and delivered at night). This is somewhat similar to a company freezing water at night when electricity is cheaper and then using the cooled water during the day for cooling.

The H-R diagram, also known as the Hertzsprung-Russell diagram is a graph that demonstrates the relationship between luminosity, temperature, classification, and spectral types of stars. This diagram shows the life cycle of stars. The life cycle of stars begins with their formation, followed by a sequence of changes leading to the death of a star. The location of a star on an H-R diagram enables us to determine the mass, temperature, and luminosity of the star.

The following can be determined from the location of a main-sequence star on the H-R diagram- The position of a star on the H-R diagram is determined by the star's mass. More massive stars are placed to the left of the diagram, while less massive stars are placed on the right. Temperature can be calculated by looking at where the star falls on the horizontal axis of the H-R diagram. The temperature ranges from cool to hot, left to right. By studying the location of the star on the vertical axis, we can determine its luminosity. The luminosity ranges from dim to bright, from bottom to top.

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The expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by E = Y * e * ln(L) * A

The work done to stretch the wire can be calculated by integrating the force applied over the displacement. In this case, the force applied is the tension (T) in the wire, and the displacement is the change in length (ΔL) from the original length (L) to the stretched length (L + ΔL).

The tension in the wire is given by Hooke's law, which states that the tension is proportional to the extension of the wire:

T = Y * (ΔL / L)

where Y is the Young's modulus of the material of the wire.

Now, let's calculate the work done to stretch the wire:

dW = T * dL

Integrating this expression from L to L + ΔL:

W = ∫ T * dL = ∫ Y * (ΔL / L) * dL

W = Y * ΔL * ∫ (dL / L)

W = Y * ΔL * ln(L) + C

Here, C is the constant of integration. Since the energy stored in the wire is zero when it is unstretched (ΔL = 0), we can set C = 0.

Finally, the expression for the energy stored in the wire (E) is:

E = W = Y * ΔL * ln(L)

or, if we substitute the cross-sectional area (A) and strain (e) of the wire, where e = ΔL / L:

E = Y * e * ln(L) * A

Thus, the expression for the energy stored (E) in a stretched wire of original length (L), cross-sectional area (A), tension (T), and Young's modulus (Y) is given by:

E = Y * e * ln(L) * A

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Answer:

The mass of the cart-box system is now 20 kg (15 kg + 5 kg). The inertia of the cart-box system has also increased as the additional 5 kg box requires more force to move than just the 15 kg cart alone. So, the cart-box system has both greater mass and greater inertia than the cart alone.

Explanation:

The difference between the approved reimbursement and what the physician is charging is called: adjustment.

Reimbursement Approval is defined as the approval, agreement, determination, or decision recommending and otherwise approving the Merchandise for use and/or establishing the Product's prices that can be reimbursed in regulatory cities and counties.

Most companies' laws require the bills and the justification for the outlay to be submitted. You can submit bills for reimbursement, and the business finance department will endorse them based on your qualifications.

Reimbursement is profit paid to an employee, customer, or some other party to cover a business expense, general liability, taxes, or other costs. Out-of-pocket expenses, such as travel and food, are included in business expense reimbursements.

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If a horizontal, uniform board of weight 125 N and length 4 m is supported by vertical chains at each end and a person weighing 500 N is sitting on the board, the tension in the right chain is 250 N then the tension in the left chain is 375 N.

A horizontal, uniform board of weight 125 N and length 4 m is supported by vertical chains at each end. A person weighing 500 N is sitting on the board.

The tension in the right chain is 250 N. What is the tension in the left chain?

The tension in the left chain is 375 N.

How to find the tension in the left chain?

Here, the weight of the board is W1= 125 N

Weight of the person sitting on the board is W2 = 500 N

Length of the board is L = 4 m

Tension in the right chain is T1 = 250 N

Tension in the left chain is T2

The sum of the tension in both chains will be equal to the weight of the board and the person sitting on the board. i.e., T1 + T2 = W1 + W2.

T2 + 250 N = 125 N + 500 N

T2 = 625 N - 250 N

T2 = 375 N

Therefore, the tension in the left chain is 375 N.

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Here are the answers to the questions:1. Three main orbital changes that the earth undergoes and their time periods are:A. Precession- every 26,000 years B. Obliquity- every 41,000 years C. Eccentricity- every 100,000 yearsThese changes in the earth's orbit, together, have an impact on the amount of solar radiation that reaches the Earth's surface, which then affects climate change. Three cyclical orbital changes and their times associated with Milankovitch are:A. Eccentricity - every 100,000 yearsB. Obliquity - every 41,000 yearsC. Precession - every 26,000 years2. All EMR in order of wavelength are:- Gamma rays- X-rays- Ultraviolet radiation- Visible light- Infrared radiation- Microwave- Radio wavesForms of EMR from the sun that are reaching right now are UV radiation, visible light, and infrared radiation.

The number of forms of EMR reaching the moon right now is two, UV radiation, and visible light.The ozone layer is present in the stratosphere and is formed through a series of complex chemical reactions. The primary function of the ozone layer is to protect the earth from the harmful effects of UV radiation by absorbing it. The balance of EMR plays a critical role in the greenhouse effect. As the amount of greenhouse gases increases, the amount of energy that is absorbed by the Earth's surface also increases. Carbon dioxide and other greenhouse gases can absorb and emit infrared radiation, which plays a crucial role in climate change.3. The four forms of heat transfer to and on planet earth are:- Conduction- Convection- Radiation- AdvectionThese four forms of heat transfer are responsible for weather on planet Earth.

For example, when the sun heats the ground, it results in conduction, which then results in convection as the air heats up and rises. This can lead to cloud formation and precipitation.4. The time it takes for EMR from the University of Delaware to reach:A. Moon - About 1.28 secondsB. Jupiter - About 33.75 minutesC. Closest star (not the sun) - About 4.37 yearsD. Your mother - This question is not clear, please provide more context.

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Answer:

The cliff is 74.4m.

Explanation:

The reading above clearly state that a ball is dropped straight down with the speed of 9.3m/s and hit the ground exactly at a time of 8.0s after you released it. And it is asking for the distance of the cliff.

In speed formula make distance the subject.

Therefore Distance = speed × time

Distance = 9.3mls × 8.0s = 74.4m

Therefore the cliff is 74.4m.