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
DiKsa [7]
3 years ago
9

When salt and water are mixed, they form a solution like in the ocean. When sand and water are mixed, they form a mixture where

the sand does not dissolve. Which statement might summarize this observation?
A) Mixtures and solutions are the same.
B) All substances mixed with water are solutions.
C) In mixtures, you cannot see the separate substances.
D) In solutions you cannot see the separate substances.
Physics
2 answers:
kodGreya [7K]3 years ago
4 0

The correct answer is D) In solutions you cannot see the separate substances.

Explanation:

In a solution, one substance dissolves in another, for example, salt dissolves in water. This process results in a homogeneous substance or mixture, in which the particles of the original substances cannot be seen separately. Also, these substances are chemically combined forming a new substance.

On the other hand, in a mixture such as combining sand and water, the particles of each substance are physically, but not chemically combined. Due to this, particles of each substance can be identified in the mixture, and these can be separated. According to this, the statement that summarizes the observation presented is "in solutions you cannot see the separate substances" considering in solutions the result is a homogeneous substance.

Yuliya22 [10]3 years ago
3 0

Answer:

D

Explanation:

The answer is D. Solutions you cannot see the separate substances. however in a mixture you can see the different substances. So the correct choice is D

You might be interested in
Indicate the substance that is NOT an element.
Volgvan
Water is Not an element
4 0
2 years ago
Susan's 12.0 kg baby brother Paul sits on a mat. Susan pulls the mat across the floor using a rope that is angled 30∘ above the
Pavlova-9 [17]

Answer:1.71 m/s

Explanation:

Given

mass of Susan m=12 kg

Inclination \theta =30^{\circ}

Tension T=29 N

coefficient of Friction \mu =0.18

Resolving Forces Along x axis

F_x=T\cos \theta -f_r

where f_r=friction\ Force  

F_y=mg-N-T\sin \theta

since there is no movement in Y direction therefore

N=mg-T\sin \theta

and f_r=\mu N

Thus F_x=T\cos \theta -\mu N

F_x=29\cos (30)-\0.18\times (12\times 9.8-29\sin (30))                

F_x=25.114-18.558

F_x=6.556 N

Work done by applied Force is equal to change to kinetic Energy

F_x\cdot x=\frac{1}{2}\cdot mv_f^2-\frac{1}{2}\cdot mv_i^2

6.556\times 2.7=\frac{1}{2}\cdot 12\times v_f^2

v_f^2=\frac{6.556\times 2.7\times 2}{12}

v_f^2=2.95

v_f=1.717 m/s        

8 0
3 years ago
Which word means rain? A. cirrus B. nimbus C. stratus D. cumulus
vovikov84 [41]
C- Stratus clouds are the rainy clouds.
Hope this helps!
8 0
3 years ago
A train travels 77 kilometers in 4 hours, and then 76 kilometers in 2 hours. What is its average speed?
Masja [62]

( (77/4) + 76/2 )/2 = 28.625 km/h is what i got

4 0
3 years ago
Find the ratio of the diameter of iron to copper wire, if they have the same resistance per unit length (as they might in househ
Natasha_Volkova [10]

Answer:

The ratio of the diameter of iron to Cu is;

\frac{d{Fe}   }{ d{Cu}   } =\sqrt{\frac{p_{Fe} }{ p_{Cu} }}

Explanation:

R=(ρL)/A

  • R is resistance,
  • L is length,
  • A is area,
  • ρ is resistivity
  • d is diameter

from the question the two materials have the same resistance per unit length.

\frac{R}{L}= \frac{p}{A}

\frac{R}{L}   for iron = \frac{R}{L}  for copper

This means we can equate ρ/A for both materials.

\frac{p_{Fe} }{A_{Fe} } =\frac{p_{Cu} }{A_{Cu} }

re-arranging the equation we have,

\frac{A_{Fe}}{A_{Cu} } =\frac{p_{Fe} }{ p_{Cu} }

A=\pi \frac{d^{2} }{4}

\frac{A_{Fe}}{A_{Cu} } =\frac{d^{2}{Fe}   }{ d^{2}{Cu}   }

\frac{d^{2}{Fe}   }{ d^{2}{Cu}   } =\frac{p_{Fe} }{ p_{Cu} }

\frac{d{Fe}   }{ d{Cu}   } =\sqrt{\frac{p_{Fe} }{ p_{Cu} }}

5 0
3 years ago
Other questions:
  • You used three methods of analysis to find the acceleration of the cart on the track: a two-point difference from v(t), an avera
    7·2 answers
  • A sound wave is a
    15·1 answer
  • Why do scientists often take several measurements of the same object, average them together, and use the average value as the me
    7·1 answer
  • The electric field, generated by a point charge, has strength of 180,000 N/C at a point 1.50 cm from the point charge. What is t
    11·1 answer
  • To calculate the _____ of a moving object, divide the displacement by the time interval in which the displacement occurred.
    8·2 answers
  • You are building a uniform to protect workers from all types of nuclear radiation. If you use material that blocks _____ radiati
    5·1 answer
  • Define a machine in the physics subject ​
    8·1 answer
  • Can you help me with a science test
    6·2 answers
  • URGENT PHYSICS QUESTION WILL GIVE BRAINLIEST
    6·1 answer
  • Please help<br><br>why does 45° produce a max. range?​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!