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
eduard
4 years ago
6

Safety precautions taken while determining the melting point of naphthalene using cooling curve​

Physics
1 answer:
frozen [14]4 years ago
3 0

Answer:What precaution should you take with naphthalene? Briefly explain why there is a constant-temperature plateau in the cooling curve in Figure 1 but not in Figure 2. Briefly explain why, in Figures 1 and 2, the temperature rises immediately after the first crystals appear. If you could only record a single temperature reading in a freezing point determination experiment, which temperature should you record? (This is the point that you should observe most carefully when carrying out the experiment.) Briefly explain why it is important for the beaker of water to cool slowly and for you to stir the naphthalene liquid as it cools.

Explanation:

You might be interested in
The rate at which work is done is known as which of the following?
sveta [45]

Answer:

A , power

Explanation:

Hope this is useful. Have a lovely rest of your day! God bless you.

3 0
3 years ago
A man holds a child on his shoulders while watching a football match. How many work has he done if the game lasts for 2 hours? ​
Shalnov [3]

very interesting and amazing question u had asked but i get it...

Answer

  • work done is given by

W = Force × Displacement

  • but in above case force is exerted on the men as the weight of the child × gravitational pull of earth (9.8 m/s^2) but the displacement or movement is ZERO
  • there for W= F×0 =0
  • so even after carrying child for 2 hours work done by the men will be zero

<u>More</u><u> </u><u>examples</u>

  • a person standing straight and lifting weight
  • a person carry some weight and walk in a circular path and came back to its original position.........in this case also Displacement will be zero

------------------------------------

hope it helped u buddy

4 0
4 years ago
Read 2 more answers
A scientific law:
vladimir1956 [14]
D. All of the above

This is true because scientific laws are all 3:
• They are well tested (to become a definite law)
• They are usually in equation form; for example: (e=mc^2)
• They are usually an example of a scientific model. The model generally will demonstrate the principle.

Hope this helps! ✅
3 0
4 years ago
Read 2 more answers
Give at least two similarities and differences among the terrestrial planets Mars Venus and Earth​
Viktor [21]

Answer:

Answer is as follow:

Explanation:

With a distance of just 6,792 km, Mars is even smaller. And again, Venus would be almost Earth's double in terms of scale. It has 81 percent of the earth 's volume, while Mars has just 10 percent of the earth 's mass. Mars and Venus have very different ecosystems, and they are both very separate from Earth.

5 0
4 years ago
If you were to walk at a constant speed 20m/s for 30 seconds, how far would you walk?
lana [24]

Answer:

600m

Explanation:

30×20 at a constant speed is 600m.

6 0
4 years ago
Other questions:
  • Who discovered white blood cells
    15·1 answer
  • A skydiver jumps out of a helicopter and falls freely for 14.4 s before opening the parachute. What is the skydivers speed (in m
    8·1 answer
  • Choose all items below that apply to elastic collisions.
    13·1 answer
  • Which of these objects has kinetic energy?
    14·2 answers
  • Instrument used in measurement Amount of substance<br>​
    11·2 answers
  • YThe gravitational force between two objects is 100 N.
    10·2 answers
  • As shown in the figure, a 2.00-kg block is held in place against the spring by a 50-N horizontal external force. The external fo
    8·1 answer
  • What specific space object is shown in the picture below?
    14·1 answer
  • Please select the word from the list that best fits the definition
    6·1 answer
  • S A block of mass M is connected to a spring of mass m and oscillates in simple harmonic motion on a frictionless, horizontal tr
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!