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
just olya [345]
3 years ago
5

What is a substance

Physics
2 answers:
Korolek [52]3 years ago
8 0

Explanation:

A particular kind of matter with uniform properties..

Alja [10]3 years ago
7 0

Answer:

es una clase particular de materia homogénea cuya composición es fija​ y químicamente definida.​ Se compone por las siguientes entidades: moléculas, unidades formulares y átomos.​

Explanation:

You might be interested in
What is the definition of chemical change
Dima020 [189]
Chemical change is any change that results in the formation of new chemical substances. At the molecular level, chemical change involves making or breaking of bonds between atoms. These changes are chemical: iron rusting (iron oxide forms) gasoline burning (water vapor and carbon dioxide form)
3 0
3 years ago
Match the scenario to the type of potential energy represented.
Phantasy [73]

Explanation:

A battery sits in an iPod before the iPod is turned on      Chemical

A man at a carnival lifts a hammer high over his head

before swinging it down onto a pad.                                 Gravitational

A positively charged particle is slowly moved away

from a strong, negatively charged plate                               Electric

The string of a bow and arrow is pulled tight.                      Elastic

Energy is defined as the ability to do work. There are two main forms of energy which are:

  • Potential energy
  • Kinetic energy

Chemical energy energy is a form of potential energy produced through chemical reactions. A car battery is an electrochemical that converts chemical energy into electrical energy for use in the iPod. The battery is made up of electrodes through which electron flows in one direction and current is generated by the potential difference set up

Gravitational energy is a form of potential energy that tends to pull all bodies to the center of the earth. It is an attractive force.

Electrical energy is a form of energy produced through the flow of electric current in a body. As the positive charge moves away from the strong negative plate, an electric current is produced.

Elastic energy is a potential energy stored in elastic bodies that can be stretched and are not plastic.

Learn more;

Energy brainly.com/question/9231468

#learnwithBrainly

4 0
3 years ago
Describe three physical changes that occur in nature?
Alex Ar [27]

Answer: Physical changes in nature could then be erosion in a mountain, the melting of snow, and a river freezing over from the cold. Since none of these changes affect the chemical composition of the mountain, the snow, or the river, they are physical changes.

Explanation:

8 0
3 years ago
Read 2 more answers
A 3kg object has an initial velocity (6i - 2j) m/s (a ) what is its kinetic energy at this time? (b) Find total work done on the
guapka [62]

Answer:

K.E =  \frac{1}{2} m {v}^{2}  \\  {v}^{2}_i  =  {v}^{2} _x + {v}^{2} _y \\  =  {(6)}^{2}  +  {( - 2)}^{2}  = 36 + 4 = 40m. {s}^{ - 1} \\ K.E_i =  \frac{1}{2} (3) (40) = 60J \\  \\ {v}^{2}_f  =  {v}^{2} _x + {v}^{2} _y \\  =  {(8)}^{2}  +  {(4)}^{2}  = 80m. {s}^{ - 1} \\ K.E_i =  \frac{1}{2} (3) (80) = 120J \\ W_{net}=K.E_f-K.E_i \\  = 120J - 60J \\  = 60J

3 0
3 years ago
What is the mass of a sample of water that takes 2000 kJ of energy to boil into steam at 373 K? The latent heat of vaporization
GREYUIT [131]

Answer : The mass of a sample of water is, 888.89 grams

Explanation :

Latent heat of vaporization : It is defined as the amount of heat energy released or absorbed when the liquid converted to vapor at atmospheric pressure at its boiling point.

Formula used :

q=L\times m

where,

q = heat = 2000 kJ = 2\times 10^6J       (1 kJ = 1000 J)

L = latent heat of vaporization of water = 2.25\times 10^6J/kg

m = mass of sample of water = ?

Now put all the given values in the above formula, we get:

2\times 10^6J=(2.25\times 10^6J/kg)\times m

m=0.88889kg=888.89g       (1 kg = 1000 g)

Therefore, the mass of a sample of water is, 888.89 grams

3 0
3 years ago
Other questions:
  • A student creates interest in a visualization by contrasting the amount of light and dark. what color element is used?
    12·1 answer
  • What is geothermal power
    12·2 answers
  • The position of a 2.2 kg mass is given by x=(2t3â5t2) m, where t is in seconds.
    11·1 answer
  • Is the momentum of a 0.1 kg Mass moving with a velocity of 5 miles per second West
    7·2 answers
  • Your spaceship lands on an unknown planet. to determine the characteristics of this planet, you drop a 1.50 kg wrench from 5.50
    12·2 answers
  • A push or a pull on an object is known as a(n)
    6·2 answers
  • If you drop a bar of soap on the floor is it clean or dirty
    10·2 answers
  • If an object of mass m1 = 0.55 ???????? is sliding without friction in the +x-direction on a level surface at a speed of ????1 =
    6·1 answer
  • Famous scientists, who was credited with perfecting the telescope and saying there is another side to the moon?.
    6·1 answer
  • Light with a wavelength of about 490 nm is made to pass through a diffraction grating. the angle formed between the path of the
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!