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
xenn [34]
3 years ago
11

Help me I need help anyone

Physics
2 answers:
katovenus [111]3 years ago
8 0
Is a physical change because only the state of the matter has changed.

Physical changes can often be reversed. Allowing the water to evaporate will return the salt to a solid state.

It has not combined with the water to cause an irreversible chemical reaction.
vodomira [7]3 years ago
5 0

boil off water. salt residue left. just answered this q somewhere else.

the salt is the same as it was before

You might be interested in
During intercourse, Lydia constantly worries whether her partner thinks she is
Misha Larkins [42]
Answer is c spectatoring
6 0
3 years ago
Students who embrace an innate mindset might view their poor performance in math as inevitable or beyond their control
PilotLPTM [1.2K]

Answer:

True

Explanation:

4 0
3 years ago
Read 2 more answers
Water flows through a cast steel pipe (k = 50 W m.K, ε = 0.8) with an outer diameter of 104mm and 2 mm wall thickness. Calculate
masha68 [24]

Answer:

The heat loss per unit length is   \frac{Q}{L}   = 2981 W/m

Explanation:

From the question we are told that

     The outer diameter of the pipe is d = 104mm = \frac{104}{1000} = 0.104 m

     The thickness is  D = 2mm = \frac{2}{1000} = 0.002m  

      The temperature  of water is  T = 90^oC = 90 + 273 = 363K  

      The outside air temperature is T_a = -10^oC = -10 +273 = 263K

        The water side heat transfer coefficient is z_1 = 300 W/ m^2 \cdot K

       The  heat transfer coefficient is  z_2 = 20 W/m^2 \cdot K

The heat lost per unit length is mathematically represented as

           \frac{Q}{L}   = \frac{2 \pi (T - Ta)}{ \frac{ln [\frac{d}{D} ]}{z_1}  +  \frac{ln [\frac{d}{D} ]}{z_2}}

Substituting values

         \frac{Q}{L}   = \frac{2 * 3.142 (363 - 263)}{ \frac{ln [\frac{0.104}{0.002} ]}{300}  +  \frac{ln [\frac{0.104}{0.002} ]}{20}}

           \frac{Q}{L}   = \frac{628}{0.2107}

           \frac{Q}{L}   = 2981 W/m

6 0
3 years ago
how far can a mother push a 20.0kg baby carriage, using a force of 62.0N at angle of 30.0°to the horizontal, if she can do 2920
enot [183]
Here is my solution using my app.

4 0
3 years ago
What are valence electrons?
SashulF [63]

Answer:

The correct answer is D. Electrons in an atom that can bond with other atoms.

Explanation:

For those of you that need it still

8 0
2 years ago
Other questions:
  • Two common ions of manganese are Mn2+ and Mn3+. Which binary ionic compound is likely to form? A) Mn2N3 B) MnBr4 C) MnCl D) MnO
    11·2 answers
  • A small sphere of mass m is launched horizontally over a body of water from a height h above the water and with a launch speed v
    15·1 answer
  • What angle would you use for the greatest distance when the projectile leaves at zero height above ground g
    14·2 answers
  • A mixture can be classified as a solution, suspension, or coiled based on the: A. Number or particles it contains. B. Size of it
    11·1 answer
  • A student is conducting an experiment to determine how far a ball will roll down a ramp based on the angle of incline. What are
    7·1 answer
  • An object is moving at a constant velocity. All but one of the following statements could be true. Which one cannot be true?
    10·1 answer
  • 1. Two students have volunteered to explore the galaxy in a
    13·1 answer
  • small plastic container, called the coolant reservoir, catches the radiator fluid that overflowswhen the automobile engine becom
    5·1 answer
  • How can you tell there is only one atom of oxygen in H2O?
    10·1 answer
  • Why this app says im in high school.?. im in middle and im 13
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!