PHYSICS
MIDDLE SCHOOL

Answer: The sun is always hitting the icebergs melting them. When two icebergs rub together it makes heat while also the sun is also melting them giving it lots of heat energy

Answer: The tension of cold icebergs rubbing creates heat and it can also be how large the quantity is

MIDDLE SCHOOL

A benefit of using good human relations is that you'll A. have an easy time getting a better job.

B. adjust to new situations better.

C. find new and better friends.

D. try to outdo your friends.

Its either B or C but im leaning more towards B but i could be wrong

The Answer Is B adjust to new situations better.

COLLEGE

Calculate the efficiency of an engine in a power plant operating between 40 Â° c and 320 Â° c. remember that the efficiency is a decimal number less than 1.

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MIDDLE SCHOOL

How much heat is needed to raise the temperature of 10g of water by 16°C?

26°F

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COLLEGE

Calculate the freezing point of a solution of 40.0 g methyl salicylate, c7h6o2, dissolved in 800. g of benzene, c6h6. and the freezing point is 5.50°c for benzene. calculate the freezing point of a solution of 40.0 g methyl salicylate, c7h6o2, dissolved in 800. g of benzene, c6h6. and the freezing point is 5.50°c for benzene. 3.41°c -2.09°c 7.59°c 2.09°c

From the problem statement, we are given a solution thus the solute in the solution would have an effect on some of the properties of the whole system. These properties are called the colligative properties. To calculate the freezing point of the solution, we use the freezing point depression equation which is expressed as follows:

ΔTf = kf(m)i

where ΔTf represents the freezing point depression, kf is a constant which 4.90 C/m for benzene, i is the vant hoff factor which is 1 for the given solute since it does not dissociate into ions and m is the molality of the solution. We calculate as follows:

ΔTf = kf(m)i

ΔTf = 4.90 (40.00 / .800 (122.13)) (1)

ΔTf = 2.01 C

ΔTf = Tf - Tfs

Tfs = 5.5 - 2.01

Tfs = 3.49 C

The correct answer would be the first option.

ΔTf = kf(m)i

where ΔTf represents the freezing point depression, kf is a constant which 4.90 C/m for benzene, i is the vant hoff factor which is 1 for the given solute since it does not dissociate into ions and m is the molality of the solution. We calculate as follows:

ΔTf = kf(m)i

ΔTf = 4.90 (40.00 / .800 (122.13)) (1)

ΔTf = 2.01 C

ΔTf = Tf - Tfs

Tfs = 5.5 - 2.01

Tfs = 3.49 C

The correct answer would be the first option.

The freezing point of the solution will be 3.9075 .

The freezing point of the solution will be calculated by the formula:

is the constant = 4.90 C/m (benzene), i = von't hoff factor = 1

molality =

molality =

molality = 0.325 m

= 4.90 0.325

= 1.5925

The temperature of benzene is and the change in temperature is 1.5925 .

So, the solution temperature will be :

= 5.50 - 1.5925 .

= 3.9075 .

The freezing point of the solution will be 3.9075 .

For more information, refer to the link:

brainly.com/question/20470260

HIGH SCHOOL

An aircraft has a liftoff speed of 33 m/s. what minimum constant acceleration does this require if the aircraft is to be airborne after a take-off run of 240m? show work.

We will use simple formula for velocity with constant acceleration.

and formula for path

where:

v0 - initial velocity

a - constant acceleration

t- time

x - path

x0 - initial position

v0, and x0 are equal to 0 in this case, so we can simplify our formula to

and

We can modify first formula to get time

and substitute it to second formula.

Now we can find acceleration

m/s

and formula for path

where:

v0 - initial velocity

a - constant acceleration

t- time

x - path

x0 - initial position

v0, and x0 are equal to 0 in this case, so we can simplify our formula to

and

We can modify first formula to get time

and substitute it to second formula.

Now we can find acceleration

m/s

HIGH SCHOOL

A country produces pears and barley . 1.) using the 3-point curved line drawing tool, draw a representative ppc for this country. label it 'ppc'. 2.) using the point drawing tool, show a production point that is efficient. label it 'a'. 3

Answer:

1) The representative PPC for the country is shown on the first uploaded image.

2)The point labeled A on the uploaded image is the efficient production point

Explanation:

In order to gain an understanding for how the solution was gotten we need to gain an understanding of what PPC( Production Possibility curve) is

PPC (Production Possibility curve):

The Production Possibility curve (PPC) can be defined as a curve that give insight on various combinations of the amounts of two goods which can be produced within the given resource and technology it can also be as a graphical representation showing all the possible options of output for two products that can be produced using all factors of production,given that all the available resources are fully and efficiently utilized.

Looking at the diagram uploaded the TT⁾ curve represents the PPC of this economy that we are considering.The slope of the of PPC is MRT (Marginal Rate Transformation) and this measures the rate at which how much production of one goods has to be reduced to increase the production of another goo.looking at the curve we see that this PPC is negatively sloped which implies that as the production of one good increases,the production of the other goods decreases.

The point A on the curve is the efficient point because all point on the PPC curve are efficient ,since all points on the PPC represents the maximum production of goods utilizing the given resources in the best way,and the given technology.

MIDDLE SCHOOL

9. You drive a car from Milwaukee to Chicago, which is a distance of 150km and it takes you 95 min. What is its velocity in km/hr and m/s?

For this case we have to, by definition:

Where:

v: It's the velocity

x: It is the distance traveled

t: It is the time spent

1 hour equals 60 minutes and 1 minute equals 60 seconds.

On the other hand:

1 kilometer equals 1000 meters

So:

On the other hand:

ANswer:

HIGH SCHOOL

During the early 1800s, these professionals regularly appeared in court to answer questions related to physical evidence. chemistry

forensic science

legal

medical

Answer: Forensic science

In early 1800s, the professional investigators regularly attend court trial to answer questions related to physical evidence, which is described as forensic science. The study of physical evidence is a practical tool to assist police in conducting investigations by developing a sense of how the crime was committed. Therefore, the application of forensic science is a great help in solving crime.

Forensic science is the answer

HIGH SCHOOL

The air in a room has a mass of 50kg and a specific heat of 1,000 J/(kg.C). What is the change in the thermal energy of the air when it warms from 20 degrees C to 30 degrees C?

We know the change of thermal energy is proportional to the specific heat of the matter, its mass and the change of temperatures, according the following formula: Q = C*m*(Tf-Ti) where: Q is the heat added or removed (in joules, J) C is the specific heat of the matter, in our case air 1,000 J/(Kg*C) m is the mass, in our case 50 kg of air Tf is final temperature Ti is initial temperature then: Q = 1000 * 50 * (30-20) = 500,000 Joules That means that 500,000 joules need to be added to increase temperature of the room 10 ÂşC (from 20 to 30 ÂşC)

Answer:the answer is Q306,000j

Explanation: