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
AlexFokin [52]
3 years ago
5

When fat comes in contact with sodium hydroxide, it produces soap and glycerin. Determine whether this is a physical change or a

chemical change. Explain your answer.
Physics
2 answers:
DochEvi [55]3 years ago
6 0

A quick, easy way to decide whether there was a chemical change

is to look and see whether there are NEW substances after the

event, that weren't there when it started.


This particular scenario started out with fat and sodium hydroxide (lye).

And then, suddenly, POOF ! Soap and glycerin showed up. Where did

THOSE come from ? They came from the molecules in fat and lye,

getting broken up and recombined to make different substances.

THAT's exactly a chemical change.

DerKrebs [107]3 years ago
5 0

Answer:

This is a chemical change because new substances are formed with different properties and identities.

Explanation:

You might be interested in
A 64.0 cm long cord is vibrating in such a manner that it forms a standing wave with two antinodes. (The cord is fixed at both e
xxMikexx [17]

Answer:

the wave represents the second harmonic.

Explanation:

Given;

length of the cord, L = 64 cm

The first harmonic of a cord fixed at both ends is given as;

f_o = \frac{V}{2L}

The wavelength of a standing wave with two antinodes is calculated as follows;

L = N---> A -----> N    +   N ----> A -----> N

Where;

N is node

A is antinode

L = N---> A -----> N    +   N ----> A -----> N =  λ/2  + λ/2

L = λ

The harmonic is calculated as;

f = \frac{V}{\lambda} \\\\f = \frac{V}{L} = 2(\frac{V}{2L} ) = 2(f_o) = 2^{nd} \ harmonic

Therefore, the wave represents the second harmonic.

L = λ

5 0
3 years ago
In a car how does an air bag minimize the force acting on a person during a collision
Klio2033 [76]
It decreases the momentum in the car.
4 0
3 years ago
Read 2 more answers
A 500kg car is driven forward with a thrust force of 1500N. Air resistance and friction acts against the motion of the car with
Wittaler [7]
2m/s^2, this is because F=ma, meaning a is also equal to F/m. The car applies 1500N in one direction and outside sources apply a total of -500N, meaning the 500kg car is moving forward with a total of 1000N of force. Taking the total 1000N and dividing it by 500kg gives you and acceleration of 2m/s^2. Hope this helps!
8 0
2 years ago
Electromagnetic waves do require a medium to travel.<br><br> True<br> False
pshichka [43]

Answer:

The Answer is false

Explanation:

Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.

8 0
3 years ago
Read 2 more answers
Brainly malfunction?|<br><br> I'm not sure why but...
Brut [27]

Answer:

its probably still trying to load ur next rank or whatever it did it to me too

Explanation:

6 0
2 years ago
Other questions:
  • Using r.i.v.p. How do I calculate circuits wit 12 volts
    14·1 answer
  • If both the pressure and volume of a given sample of an ideal gas are doubled, what happens to the temperature of the gas in Kel
    9·1 answer
  • In a certain region of space, a uniform electric field is in the x direction. A particle with negative charge is carried from x
    11·1 answer
  • 1. Explain the importance of doing muscular strength and muscular endurance activities.
    5·2 answers
  • A wave with low frequency would have relatively ________.
    8·2 answers
  • Most electrical power generation (except for solar) converts motion into electricity using a generator. The two required compone
    11·2 answers
  • You pour 250 g of tea into a Styrofoam cup, initially at 80∘C and stir in a little sugar using a 100-g aluminum 20∘C spoon and l
    10·1 answer
  • A weather forecaster uses a computational model on a Monday to predict the weather on Friday. Why might that forecast change? (1
    6·1 answer
  • Se deja caer una caja de madera de 4.5kg de masa desde una altura de 2.25metros .
    10·1 answer
  • A simple pendulum is suspended from the ceiling of a stationary elevator, and the period is determined.(i) When the elevator acc
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!