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
mixas84 [53]
3 years ago
10

What is the difference between a physical change and a chemical change

Physics
2 answers:
Contact [7]3 years ago
6 0
A physical change in something doesn't change what the it is. For example, if you break glass, it will still be glass. In a chemical change where there is a chemical reaction, a new thing is formed and energy is either given off or absorbed. For example, when you burn a log. The carbon in the log is reacting to the oxygen to create ashe and smoke
Aleks [24]3 years ago
4 0
 physical rearranges molecules but doesn't affect their internal structures while chemical <span>is any change that results in the formation of new chemical substances</span>
You might be interested in
Does a rolling basketball have kinetic energy
777dan777 [17]

Answer:

yes

Explanation:

kinetic energy is when something has a force acting upon it. potential energy is the opposite

3 0
3 years ago
Read 2 more answers
What is meant by the "lever arm" of a torque?
enyata [817]
Torque = Force applied x lever arm. It twists the object or changes the rotational motion of things


Hope it helps
3 0
3 years ago
A rock is attached to the left end of a uniform meter stick that has the same mass as the rock. How far from the left end of the
kotykmax [81]

Answer:

M₂ = M  then L₂ = L

M₂> M  then L₂ = \frac{M}{M_{2}} L

Explanation:

This is a static equilibrium exercise, to solve it we must fix a reference system at the turning point, generally in the center of the rod. By convention counterclockwise turns are considered positive

          ∑ τ = 0

           

The mass of the rock is M and placed at a distance, L the mass of the rod M₁, is considered to be placed in its center of mass, which by uniform e is in its geometric center (x = 0) and the triangular mass M₂, with a distance L₂

The triangular shape of the second object determines that its mass can be considered concentrated in its geometric center (median) that tapers with a vertical line if the triangle is equilateral, the most used shape in measurements.

         M L + M₁ 0 - m₂ L₂ = 0

         M L - m₂ L₂ = 0

         L₂ = \frac{M}{M_{2}} L

From this answer we have several possibilities

* if the two masses are equal then L₂ = L

* If the masses are different, with M₂> M then L₂ = \frac{M}{M_{2}} L

6 0
3 years ago
The volume of water in a measuring cylinder is 50 ml. When a piece of stone is immersed
Sergio039 [100]
Volume = 873 - 50 = 723 cm^3
4 0
3 years ago
What traction of the radioisotope<br>remains in the body after one day?​
r-ruslan [8.4K]

The fraction of radioisotope left after 1 day is (\frac{1}{2})^{\frac{1}{\tau}}, with the half-life expressed in days

Explanation:

The question is incomplete: however, we can still answer as follows.

The mass of a radioactive sample after a time t is given by the equation:

m(t)=m_0 (\frac{1}{2})^{\frac{t}{\tau}}

where:

m_0 is the mass of the radioactive sample at t = 0

\tau is the half-life of the sample

This means that the mass of the sample halves after one half-life.

We can rewrite the equation as

\frac{m(t)}{m_0}=(\frac{1}{2})^{\frac{t}{\tau}}

And the term on the left represents the fraction of the radioisotope left after a certain time t.

Therefore, after t = 1 days, the fraction of radioisotope left in the body is

\frac{m(1)}{m_0}=(\frac{1}{2})^{\frac{1}{\tau}}

where the half-life \tau must be expressed in days in order to match the units.

Learn more about radioactive decay:

brainly.com/question/4207569

brainly.com/question/1695370

#LearnwithBrainly

5 0
3 years ago
Other questions:
  • Friction between solids can be most accurately defined as the force that opposes the sliding motion of two surfaces that are tou
    5·1 answer
  • A closed-end manometer was attached to a vessel containing argon. The difference in the mercury levels in the two arms of the ma
    5·1 answer
  • HELP PLEASE <br>what is the total resistance an current in the diagram below
    15·1 answer
  • If you walk 8km at an average speed of 4km/h, how much time does it take
    15·2 answers
  • A block and a ball have the same mass and move with the same initial velocity across a floor and then encounter identical ramps.
    15·1 answer
  • A 0.500 kg aluminum pan on a stove is used to heat 0.250 liters of water from 20.0ºC to 80.0ºC. (a) How much heatis required? Wh
    15·1 answer
  • Satellite technology has allowed us to monitor areas that were once so remote that we had no way of monitoring them. Review the
    11·1 answer
  • HELP ME!
    10·1 answer
  • which of the answers below best describes the precaution you must make before connecting a capacitor to a circuit?
    10·1 answer
  • What is the word when 2 waves meet and affect each other
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!