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
nekit [7.7K]
3 years ago
11

I really need help!!

Physics
2 answers:
pishuonlain [190]3 years ago
4 0
-- Ice melts and becomes liquid when its temperature reaches 32°F.
The "warm and sunny day" is certainly warmer than that.

-- Table salt melts and becomes liquid when its temperature reaches 1474°F.
I'm pretty sure the day is not THAT warm and sunny.
Mars2501 [29]3 years ago
3 0
Omg! i just answered this <em>exact same</em> question last year!!! the salt doesnt melt cuz it is an ionic compound, which needs large amounts of energy to melt. it is simply sunny and warm outside, so it doesnt melt. hope i answered your question! ;)
You might be interested in
Define Archemedics principle?​
azamat

Answer:

Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially, is equal to the weight of the fluid that the body displaces. Archimedes' principle is a law of physics fundamental to fluid mechanics. It was formulated by Archimedes of Syracuse.

6 0
3 years ago
Physical Science Lesson 4 unit 2 questions, I need the answers
neonofarm [45]
I know I'm a bit late but just in case you still need some of the answers.

1: Oxygen
2: Change in shape
3: Water breaking down into hydrogen and oxygen
4: I think it's Milk but I might be wrong.

I might be wrong about some of them, sorry it's not much.

7 0
4 years ago
Read 2 more answers
What are the difference between conductor and insulator? ​
Anvisha [2.4K]

Answer:

  • A conductor allows energy e.g. electric charge or heat to pass through it easily. While an insulator does not let electric current or heat to travel through it.
  • Insulators have strong molecular bonds. While molecular bonds are very weak in conductors.
  • Insulators have very low conductivity. While in conductors, it is very high.
  • Insulators have a very high resistance and therefore the electrons are held together very firmly. The conductors, on the other hand, have a very low resistance.
  • Insulators do not have any electric field, neither inside nor on the surface. While in conductors, it is found on the surface and continues to be zero in the inner part of the conductor.
5 0
3 years ago
Which term, taken from the celestial sphere, gives its name to a.m. and p.m.?
DaniilM [7]

Options are. Zenith, Great circle, Equinox, or Meridan
3 0
3 years ago
The filament of a certain lamp has a resistance that increases linearly with temperature. When a constant voltage is switched on
alekssr [168]

Answer:

The change in temperature is \Delta T  = 1795 K

Explanation:

From the question we  are told that

   The temperature coefficient is  \alpha  =  4 * 10^{-3 }\  k^{-1 }

The resistance of the filament is mathematically represented as

           R  =  R_o [1 + \alpha  \Delta T]

Where R_o is the initial resistance

Making the change in temperature the subject of the formula

     \Delta T = \frac{1}{\alpha } [\frac{R}{R_o} - 1 ]

Now from ohm law

           I = \frac{V}{R}

This implies that current varies inversely with current so

           \frac{R}{R_o} = \frac{I_o}{I}

Substituting this we have

       \Delta T  = \frac{1}{\alpha } [\frac{I_o}{I} - 1 ]

From the question we are told that

    I  = \frac{I_o}{8}

Substituting this we have

   \Delta T  = \frac{1}{\alpha } [\frac{I_o}{\frac{I_o}{8} } - 1 ]

=>     \Delta T  = \frac{1}{3.9 * 10^{-3}} (8 -1 )

        \Delta T  = 1795 K

6 0
3 years ago
Other questions:
  • At a certain elevation, the ________ , the air becomes saturated and water-vapor molecules ________.
    14·1 answer
  • Why non-metals aren't good at conducting electricity?
    6·1 answer
  • If the shoe has less mass, it will experience _______________ (more, less, the same) friction as it would with more mass.
    12·1 answer
  • A planet's temperature depends on its distance from the Sun as well as the strength of its greenhouse effect. Let's remove the e
    11·1 answer
  • Which avtivties belongs on top of physical activity pyramid
    15·2 answers
  • From readong these two paragraph only the best description of Austin is that he is a ___ character
    10·2 answers
  • How much time is needed to push a 5,000 N car 50 meters if you are using a machine with a power of 4,500 W?
    7·1 answer
  • Newspapers often talk about an energy crisis-about running out of certain energy sources in the not-so-distant future. About whi
    13·1 answer
  • At standard temperature and pressure, carbon dioxide has a density of 1.98 kg/m3. What volume does 1.70 kg of carbon dioxide occ
    7·1 answer
  • Deaths due to lifestyle diseases have declined since the early 1900s.<br><br> T<br> F
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!