1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kolbaska11 [484]
3 years ago
11

An experiment was devised to investigate the effects on the temperature of a cup of coffee when cream is added at different time

intervals. Hot and cold water were used instead of coffee and cream. First, a container of water heated to 80°C was allowed to sit for 15 minutes. Its temperature was measured at regular intervals. Next, similar temperature measurements were taken for 15 minutes on a new container of heated water, but this time some cold water was added after the 2-minute reading. Finally, the procedure was repeated except that for this last test, the cold water was added after the 12-minute reading. The resulting recorded temperatures were plotted on the graph shown here.  
1. What question was asked in the experiment?


 2. What was the hypothesis, expressed as an if-then statement? 



 3. What were the independent and dependent variables?


 4. What was the control in the experiment? 



 5. There is one thing that is wrong about this graph. What is it?

Physics
2 answers:
Darina [25.2K]3 years ago
8 0

Hypotheses followed by a conclusion is called an If-then statement or a conditional statement.

This is noted as

p→q

This is read - if p then q.

A conditional statement is false if hypothesis is true and the conclusion is false.

A dependent variable is what you measure in the experiment and what is affected during the experiment. The dependent variable responds to the independent variable. It is called dependent because it "depends" on the independent variable.

A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable. This increases the reliability of the results, often through a comparison between control measurements and the other measurements.

Its a negative and its not going up-Graph

Darya [45]3 years ago
8 0

Hi Babylilith32,

Your Question:

An experiment was devised to investigate the effects on the temperature of a cup of coffee when cream is added at different time intervals. Hot and cold water were used instead of coffee and cream. First, a container of water heated to 80°C was allowed to sit for 15 minutes. Its temperature was measured at regular intervals. Next, similar temperature measurements were taken for 15 minutes on a new container of heated water, but this time some cold water was added after the 2-minute reading. Finally, the procedure was repeated except that for this last test, the cold water was added after the 12-minute reading. The resulting recorded temperatures were plotted on the graph shown here.  

Answers:

1. If you have cool water then you have to add it to the hot water after a few minutes.

2. The independant variable is the cold water

3. The dependant variable is the temperature

4. The control is the hot water without the cold water.

5. The 2 min cold water drops way to much.

You might be interested in
An object of mass 30 kg is in free fall in a vacuum where there is no air resistance. Determine the acceleration of the object.
velikii [3]

Answer:

In free fall, mass is not relevant and there's no air resistance, so the acceleration the object is experimenting will be equal to the gravity exerted. If the object is falling on our planet, the value of gravity is approximately 9.81ms2 .

7 0
3 years ago
Which type of mountain is created when rock layers are pushed up by forces inside the Earth?
skad [1K]

Correct answer choice is :


B) Upwarped


Explanation:


An upwarped mountain is a mountain consisting of a large area of the Earth's coat that has led smoothly upward without much visible deformation and normally including sedimentary, igneous, and metamorphic rocks. Sedimentary rocks are set down in layers called beds or layers. A bed is described as a layer of rock that has a similar lithology and character. Beds form by the removal of layers of sand on top of each other.

7 0
3 years ago
Read 2 more answers
Earth exerts a 100 N gravitational force on a metal box. What is the magnitude of the gravitational force the metal box exerts o
jeka94

We have that the magnitude of the gravitational force  is mathematically given as

f=6.377N

<h3>Force</h3>

Question Parameters:

Earth exerts a 100 N gravitational force on a metal box.

(Mass of the earth is 6e24 kg and radius of the earth is 6.4e6m.)

Generally the equation for the Gravitational mForce  is mathematically given as

F=\frac{GMm}{r^2}\\\\Therefore\\\\F=\frac{100/9.8* 6e116e24}{6.4e6^2}

f=6.377N

For more information on Force visit

brainly.com/question/26115859

7 0
2 years ago
Drosera magnifica is an organism that was first discovered in 2015.
mestny [16]

Answer:

The correct answer is - Plantae.

Explanation:

Drosera m<em>agnifica</em> is discovered in 2015 for the first time and the characteristics this organism's cell shows are -

- permanent vacuoles

- surrounded by cellulose layer

Vacuoles are present in both Plantae and Animalia kingdom of the eukaryotic organism but in animal cells, there are small and numerous vacuoles present and they are not permanent whereas in plant cells vacuoles are present permanently.

The cell of an animal cell has no surrounding layer other than cell membrane while in the plant cell there is a supporting and protecting layer of cellulose cell wall present.

On the basis of the given characteristics, it is confirmed that the Drosera magnifica belongs to Plantae kingdom.

3 0
3 years ago
Knowing that the board is 4 meters long, one child weighs 300 n and the other 250 n, where should one of the children sit so tha
Neko [114]

Answer:v nxfgdjngdnmgndjfnncnfndngndsnbxzmnfn

Explanation:

8 0
3 years ago
Other questions:
  • A car traveling at 38 m/s starts to decelerate steadily. It comes to a complete stop in 10 seconds. What is its acceleration?
    10·1 answer
  • Can someone help me?​
    11·1 answer
  • In 1985 in San Antonio, Texas, an entire hotel building was moved several
    13·1 answer
  • What are two ways that machines can change the way that work is done?
    10·2 answers
  • An astronaut tightens a bolt on a satellite in orbit. He rotates in a direction opposite to that of the bolt, and the satellite
    14·1 answer
  • PLEASE HELP IM CONFUSED
    7·1 answer
  • A train travels north at a speed of 50 m/s.
    5·1 answer
  • When you ride a bike and make a turn, you can feel your body trying to
    8·1 answer
  • 14 kilometers per hour to meters per second
    14·1 answer
  • According to Newton's Universal Law of Gravitation, when the distance between two interacting objects doubles, the gravitational
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!