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
DochEvi [55]
3 years ago
12

2. A/An _______ is composed of two or more types of matter that can be present in varying amounts.

Physics
2 answers:
yan [13]3 years ago
7 0

Answer:

2. A compound (has two+ types of matter)

3. Homogeneous (dissolves in another substance)

4. Heterogeneous  mixture

5. Element?

6. Physical?

7. a. physical b. chemical

andrew-mc [135]3 years ago
5 0

A mixture is composed of two or more types of matter that can be present in varying amounts.

A solution is a homogeneous mixture.

A mixture that is not uniform throughout is a heterogeneous mixture.

A pure substance that cannot be broken down chemically is an element.

A characteristic of matter that’s not associated with a change in its chemical composition is known as a physical property.

Wax melting is an example of a physical change in the state of matter.

A banana peel turning brown is an example of a chemical change in the state of matter.

Answers:

<em>2. A mixture</em>

<em>3. a homogeneous</em>

<em>4. a heterogeneous</em>

<em>5. an element</em>

<em>6 & 7. a physical</em>

<em>8. a chemical</em>

<u>Explanation:</u>

Mixtures can be further classified as homogeneous and heterogeneous mixtures based on the types of combining elements.

  • Homogeneous mixtures are also termed as solution as they look uniform throughout the solution.
  • Heterogeneous mixture is composed of different concentration of solute and solvent and it do not look uniform throughout the mixture.  

The physical changes occur on the object without changing its chemical properties like wax melting. While chemical changes occur due to oxidation or reduction or any other kind of reaction with the surface of matter.

You might be interested in
Which of the following is a form of mechanical energy?
ki77a [65]

Answer:

D. gravitational potential energy

Explanation:

7 0
2 years ago
HELP ME PLEASE If an object is placed under a force of 20 N, it accelerates at a rate of 5 m/s^2. If the force is increased to 5
lara [203]

Answer:

b

Explanation:

3 0
3 years ago
Read 2 more answers
Newton’s first law relates motion to balanced and unbalanced forces.
BlackZzzverrR [31]
True, an object at rest stays and rest and an object in motion stays in motion
8 0
3 years ago
Read 2 more answers
0.250 moles of gas are in a piston.The gas does 109 J of work while 240 J of heat are added. What is the change in internal ener
irina [24]

Answer:

+131Joules

Explanation:

Energy can be expressed using below expresion.

ΔE = (q + w).........eqn(1)

q will be + be if heat is gained hence, q= 240 J

work "w" will be - ve if work is done by the system, hence w= -109 J

Then substitute into eqn(1)

Change in Internal energy=

= (240 -109 )

= +131J

6 0
3 years ago
When Jim and Rob ride bicycles, Jim can only accelerate at three-quarters the acceleration of Rob. Both startfrom rest at the bo
Natali5045456 [20]

Answer:

46.4 s

Explanation:

5 minutes = 60 * 5 = 300 seconds

Let g = 9.8 m/s2. And \theta be the slope of the road, s be the distance of the road, a be the acceleration generated by Rob, 3a/4 is the acceleration generated by Jim .  Both of their motions are subjected to parallel component of the gravitational acceleration gsin\theta

Rob equation of motion can be modeled as s = a_Rt_R^2/2 = a300^2/2 = 45000a[/tex]

Jim equation of motion is s = a_Jt_J^2/2 = (3a/4)t_J^2/2 = 3at_J^2/8

As both of them cover the same distance

45000a = 3at_J^2/8

t_J^2 = 45000*8/3 = 120000

t_J = \sqrt{120000} = 346.4 s

So Jim should start 346.4 – 300 = 46.4 seconds earlier than Rob in other to reach the end at the same time

7 0
3 years ago
Other questions:
  • A spring gun is made by compressing a spring in a tube and then latching the spring at
    7·1 answer
  • 4.Explain what must be true of component waves for reinforcement or interference to occur.
    9·1 answer
  • What is the biggest barrier to the use of renewable energy in the United States?
    8·1 answer
  • 3.) If Lebron James has a vertical leap of +1.35 m. then what is his takeoff speed7 For this
    14·2 answers
  • Could someone help me eliminate some of these answer choices?
    9·2 answers
  • Most scientists believe the Big Bang Theory explains which of the following questions?
    12·2 answers
  • What of a wave is a measure of the energy it carries
    10·1 answer
  • Nitrogen has a atomic mass of 14 and a atomic of number of 7 so the number of neutrons must be ?
    6·2 answers
  • A centripetal force of 250 N is exerted on a 2.2 kg discus as it rotates uniformly in a horizontal circle of radius 0.85 m. Calc
    8·1 answer
  • a hockey puck with a mass of 0.11 kg is at rest on the horizontal frictionless surface of the rink. a player applies a horizonta
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!