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
Simora [160]
3 years ago
15

Melting, freezing, and boiling are _____________ changes. Question 3 options: A. compound

Physics
2 answers:
maks197457 [2]3 years ago
4 0
<span>Melting, freezing, and boiling are PHYSICAL changes. Reason why, you can SEE their PHYSICAL appearance change. Melting, you can see a solid (ice) melt, and turn into a liquid (that's a physical change). Freezing, is when a liquid </span>(possibly water) <span>becomes a solid. It's features change, thus it's a physical change. Boiling, when something is boiled you can see it physically BUBBLE. It heats up, and you can see steam escape from it. This is a physical change, but when you turn it off, the water goes back to normal. But not exactly. When you boil water, you're cleaning and purifying the water. So it become purified drinking water. </span>Also just a tip, when boiling water, make sure the<span> temperature is above 185° F (85° C) so it'll be able to kill all bacteria.
(I wrote this myself, it's my work.) 
Good luck with your studies, hope this helps!! ^-^</span>
vfiekz [6]3 years ago
3 0
Melting freezing and boiling are molecular changes


You might be interested in
Observing and experimenting are two ways that ecologists can answer scientific questions. What are some differences between thes
Sav [38]

Answer:OBSERVING IS WHATCHING A OBJECT VERY CLOSELY AND EXPIERIMENTING IS WER YOUTEST ON A CERTAIN THING OR CREATURE OR MASS OR ELEMENT

Explanation:IM THE MYSTERY MAN WHOOSH

6 0
3 years ago
Astronomers have observed a small, massive object at the center of our Milky Way Galaxy. A ring of material orbits this massive
Setler [38]

Answer:

The mass of the massive object at the center of the Milky Way galaxy is 3.44\times10^{37}\ Kg

Explanation:

Given that,

Diameter = 10 light year

Orbital speed = 180 km/s

Suppose determine the mass of the massive object at the center of the Milky Way galaxy.

Take the distance of one light year to be 9.461×10¹⁵ m. I was able to get this it is 4.26×10³⁷ kg.

We need to calculate the radius of the orbit

Using formula of radius

r=\dfrac{d}{2}

r=\dfrac{15\times9.461\times10^{15}}{2}

r=7.09\times10^{16}\ m

We need to calculate the mass of the massive object at the center of the Milky Way galaxy

Using formula of mass

M=\dfrac{v^2r}{G}

Put the value into the formula

M=\dfrac{(180\times10^3)^2\times7.09\times10^{16}}{6.67\times10^{-11}}

M=3.44\times10^{37}\ Kg

Hence, The mass of the massive object at the center of the Milky Way galaxy is 3.44\times10^{37}\ Kg

5 0
3 years ago
55 Points ££<br>which state of matter can undergo three types of thermal expansion​
bija089 [108]

Answer:

The three types of thermal expansions are Linear expansion , Superficial expansion and Cubical expansion

7 0
3 years ago
Read 2 more answers
Two 0.50 g spheres are charged equally and placed 2.5 cm apart. When released, they begin to accelerate at 170 m/s^2 .What is th
vitfil [10]

Answer:

q=7.65*10^{-8}C

Explanation:

Using Newton's second law, we calculate the magnitude of the electric force between the spheres:

F=ma\\F=0.5*10^{-3}kg(170\frac{m}{s^2})\\F=0.085N

The magnitude of the charge in both spheres is the same. So, we calculate the charge, using Coulomb's law:

F=\frac{kq^2}{d^2}\\q=\sqrt\frac{Fd^2}{k}\\q=\sqrt\frac{(0.085N)(2.5*10^{-2}m)^2}{8.99*10^9\frac{N\cdot m^2}{C^2}}\\q=7.65*10^{-8}C

8 0
3 years ago
Creating plasma can be dangerous because of the high amount of ___ needed to create it.
Allushta [10]
<span>Creating plasma can be dangerous because of the high amount of ENERGY needed to create it.</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • Kristina works out seven days a week. Lately, she has been tired, and her body aches. If she is overtraining, which training pri
    7·1 answer
  • A raft is made of 12 logs lashed together. Each is 45 cm in diameter and has a length of 6.5 m. How many people can the raft hol
    14·1 answer
  • Which of the following statements is true in the case of a collision?
    13·1 answer
  • A conservative force acts on a particle. We can conclude:
    15·1 answer
  • How is Venus’ rotation different than most planets? Question 3 options: A.It spins the opposite direction of most planets. B.It
    7·1 answer
  • A space transportation vehicle releases a 470-kg communications satellite while in a circular orbit 350 km above the surface of
    7·1 answer
  • Si un cuerpo adquiere una carga de -0,02 C, ha ganado o ha perdido electrones? Cuantos?
    7·1 answer
  • 4. A microchip lets computers process information very quickly,
    10·1 answer
  • What is theory of kinematics ??<br><br>this question hasn't been asked lol -,-​
    10·1 answer
  • 4. What would you suggest we do to reduce our trade deficit?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!