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
erma4kov [3.2K]
3 years ago
5

Insulators are materials that reduce heat flow. Nature uses many types of insulation to protect animals from losing too much hea

t. Blubber, feathers, and hair all help animals retain body heat. Animals often insulate their homes with wood chips, grass, and even shredded newspaper and bits of cloth. Humans have also had to find ways of insulating ourselves from the cold. In past times, homes were constructed with thick walls to protect against heat loss. Today, materials such as fiberglass and foam are often incorporated into walls and floors for insulation. In this activity, you will compare the heat-retaining ability of several insulators.
OBJECTIVES
Build and use a calorimeter to measure rate of heat loss.
Analyze data using comparative graphs.
In this experiment, you will be using a “coffee cup” calorimeter to measure the rate of heat loss for several substances and determining which of the substances is the best insulator. You will be testing the insulating capabilities of three types of fabric and the control will be air. The three types of fabric are:

Test Sample 1: 52% cotton/48% poly fabric
Test Sample 2: 100% acrylic fabric
Test Sample 3: 80% cotton/20% poly fabric
For the control, and each test sample, you will be measuring the amount of heat lost by the water in the calorimeter over 6 minutes, taking the temperature every 30 seconds. Be sure to record your data on your data sheet . View the animation to complete this experiment.

Answering the following questions will help you to focus on the outcomes of these experiments: Construct a graph of temperature versus time. Put temperature on the y-axis and time on the x-axis. Graph all three sets of data on the same graph. Use a different colored pencil for each test material. Provide a key on the graph relating the pencil color to the test material. Calculate the change in temperature from start to finish for the air and each of the samples and record on your data sheet. Which water sample lost the least amount of heat energy over the 6-minute time interval? Was the rate of heat loss constant during each experiment? How can you tell? Which material was the best insulator? Which material was the least effective insulator? Write a summary paragraph discussing this experiment and the results. Use the following questions and topics to help guide the content of your paragraph. According to your data, was your hypothesis correct? (Be sure to refer to your data and graphs when answering this question.) Summarize the conclusions that you can draw from this experiment. Use the questions above to guide your ideas. Summarize any difficulties or problems you had in performing the experiment that might have affected the results. Describe how you might change the procedure to avoid these problems. Explain why the design of the bird's nest in the picture provides good insulation for the eggs. Submit your data sheet, graph, and answers to all of the questions in the essay box below.

Physics
1 answer:
katrin2010 [14]3 years ago
6 0

Answer:

This has all the answer (Data sheet, graph, answers to the questions, and the summary) :)

You might be interested in
If Sherry took her pulse for 6 seconds and felt 14 beats, What would her heart rate be?
Schach [20]

Answer:

140 beats per minute

Explanation:

There are 60 seconds in a minute and we know that Sherry felt 14 beats in 6 seconds if you multiply 6 by 10 you get 60 seconds which can be 1 minute. Then you multiply 14 by 10 since you 14 by 10 since you multiplied 6 by 10 and you get 140 beats per minute.

5 0
2 years ago
In March 2006, two small satellites were discovered orbiting Pluto, one at a distance of 48,000 km and the other at 64,000 km. P
tatiyna

Answer:

Time period for first satellites 24.46 days and for second satellites 37.67 days

Explanation:

Given :

Distance of first satellites r_{sat1} = 48000 \times 10^{3} m

Distance of second satellites r _{sat2} = 64000 \times 10^{3} m

Distance of charon r_{c} = 19600 \times 10^{3} m

Time period of charon T_{c} = 6.39 days

From the kepler's third law,

Square of the time period is proportional to the cube of the semi major axis.

   T^{2} = r^{3}

   \frac{T}{r^{\frac{3}{2} } } = constant

For first satellites,

  \frac{T_{c} }{r_{c} ^{\frac{3}{2} }  }  = \frac{T_{sat1} }{r_{sat1} ^{\frac{3}{2} }  }

{T_{sat1} } = 6.39 \times \frac{(48000 \times 10^{3} )^{\frac{3}{2} } }{(19600\times 10^{3} )^{\frac{3}{2} }}

T_{sat1} = 24.46 days

For second satellites,

   \frac{T_{c} }{r_{c} ^{\frac{3}{2} }  }  = \frac{T_{sat2} }{r_{sat2} ^{\frac{3}{2} }  }

{T_{sat2} } = 6.39 \times \frac{(64000 \times 10^{3} )^{\frac{3}{2} } }{(19600\times 10^{3} )^{\frac{3}{2} }}

T_{sat2} = 37.67 days

Therefore, time period for first satellites = 24.46 days and for second satellites 37.67 days

8 0
3 years ago
Help now
sergiy2304 [10]

Answer:

The two neighboring planets with the greatest distance between them is <em><u>Neptune and Uranus</u></em>. This happens when they are at the opposite sides of the Sun at approximately. They are 4500 million miles away from each other.

If by adjacent you mean next to each other, in terms of the order of planets in our Solar System, then the closest would be <u><em>Earth and Venus</em></u>; which are separated by about 38,000,000 kilometres when in opposition.

I am not sure about the general patterns..

<u><em>Venus has the longest day</em></u> of any planet in our solar system. It completes one rotation every 243 Earth days.

A year on <u><em>Neptune</em></u> is the longest of any planet, lasting the equivalent of 164.8 years (or 60,182 Earth days). It is obvious because it is also the farthest with the longest orbit.

Outer planets are less dense than the inner planets because they posses a big volume but contains not much mass. Try to imagine 2 rocks, one is big, but is hollow or have a lot of holes; and the other is small, but solid with no holes.

Happy learning!!

5 0
3 years ago
Please help me
lys-0071 [83]

Answer:

3rd one I did this

Explanation:

Follow me and thank me plz

4 0
3 years ago
Place the following levels of biological organization in order from smallest to largest: atom, biosphere, cell, ecosystem, molec
enot [183]

Answer:

Explanation:

From smallest to largest we have atom >molecule>cell>tissues>organ>organism>population>ecosystem>biosphere

The smallest level capable of demonstrating all the characteristic of life is the CELL

6 0
3 years ago
Other questions:
  • Work in the amount of 280 J is done in lifting an object a distance of 4.0 m in a time. How much force did it take to lift the o
    6·1 answer
  • The energy of motion best describes which of the following
    9·2 answers
  • Question 17 options:A 71.8 kg man goes from an area where the acceleration due to gravity is 9.79 m/s2 to an area where the acce
    8·1 answer
  • Two forces (4n and 3n) pull to the left while a 12n force pulls to the right. What is the net force?
    13·2 answers
  • If questions asked in a research study to do not accurately relate to the subject or construct being studied, the study’s ______
    13·1 answer
  • A uniform rod rotates in a horizontal plane about a vertical axis through one end. The rod is 3.46 m long, weighs 12.8 N, and ro
    11·1 answer
  • Please help on this one?
    10·1 answer
  • A baseball is thrown off of a building with an initial velocity of 17 m/s and lands 2.3 seconds later. How tall is the building?
    9·1 answer
  • Answer ?
    13·1 answer
  • you are driving along a country road when you suddenly notice a log in the road ahead of you and immediately apply your brakes.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!