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
Consider a keen little boy who is having a wagon race with a friend. He starts from rest and
MAXImum [283]
A) His wagon will accelerate more.
B) His wagon will accelerate less. Both parts are answered by F=ma. Mass is inversely proportional to acceleration, and force is directly proportional to acceleration.
7 0
3 years ago
I throw a football in the x direction with a fore of 124N. The football is 4 kilograms. The football accelerated for 5 seconds.
castortr0y [4]

31 (unit)

acceleration formula

                             net force (124)

     Acceleration = -------------

                                mass     (4)

124÷4=31

6 0
2 years ago
Can we have the Doppler effect with light waves? How?
Mekhanik [1.2K]

Answer:

Besides sound and radio waves, the Doppler effect also affects the light emitted by other bodies in space. If a body in space is "blue shifted," its light waves are compacted and it is coming towards us. If it is "red shifted" the light waves are spread apart, and it is traveling away from us.

Explanation:

7 0
3 years ago
Which example describes a norenewable resource
Sergeeva-Olga [200]

Answer: An example of a non-renewable would be oil.

Explanation:

All fossil fuels are nonrenewable, but not all nonrenewable energy sources are fossil fuels. Coal, crude oil, and natural gas are all considered fossil fuels

8 0
2 years ago
To determine a waves' frequency, you must know the
givi [52]
The correct answer is<span> number of oscillations in a given period of time

This is measured in what is called the Hertz measurement and the period of time is usually taken to be per second.</span>
6 0
3 years ago
Other questions:
  • PLEASE HELP MEEE!!!! Write a scientific explanation justifying why graph 2 shows the relationship between kinetic energy and spe
    8·1 answer
  • Now you will focus on a second hypothesis. This hypothesis can be very similar to the first, but this time you want to focus onl
    9·2 answers
  • A body falls from rest under gravity, the velocity “v” is given by v=kgp h q , where h is the distance fallen through, g the acc
    9·1 answer
  • What is the relationship between frequency and pitch?
    15·1 answer
  • if the electron affinity for an element is a negative number, does it mean that the anion of the element is more stable than the
    5·1 answer
  • A 2kg pumpkin is thrown with a velocity of 15m/s towards a
    9·1 answer
  • 1. A roller coaster with a mass of 800 kg sits stationary at the top of a section of track, 75 m above
    10·1 answer
  • If I am lifting a box with a force of 100 N and the box has an acceleration of 10 N, what is the mass of the box?
    14·1 answer
  • A boulder of mass 4 kg rolls over a cliff and reaches the beach below with a velocity of 20 metres per second minus 1.
    11·1 answer
  • Students are asked to conduct an investigation on the mixing of color. They have three flashlights, each covered with a piece of
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!