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
Andru [333]
3 years ago
8

Synthetic plastics are made by linking many simple carbon molecules together to form much larger molecules. This process is call

ed 
      A. polymerization.  B. cyclization.  C. thermosetting.  D. functionalization.​
Physics
1 answer:
professor190 [17]3 years ago
8 0

Answer:

A. polymerization

Explanation:

Synthetic plastics are made by linking many simple carbon molecules together to form much larger molecules. This process is called polymerization.

Synthetic or artifical giant molecules consists of synthetic polymers such as plastics, elastomers etc. They are made up of simple monomers which links to form the complex and giant structure.

Monomers are the simplest unit of polymers. Polymers have very great sizes. The size mkaes their structure quite complex. This makes the molecules more disposed in a regular pattern with respect to one another.

The complexity of structure and the attendant effects accounts for the properties and uses that makes synthetic molecules very unique. For example, plastics can be extruded as sheets, pipes and or moulded into other objects.

You might be interested in
The froghopper, Philaenus spumarius, holds the world record for insect jumps. When leaping at an angle of 58.0 above the horizon
kirza4 [7]

Answer:

A) 3.79 m/s  B) 1.33 m

Explanation:

A)

  • Horizontal movement:
  • Once in the air, no forces act on the froghopper, so it keeps moving with the same initial horizontal speed.
  • This horizontal component, is the projection of the velocity vector on the horizontal direction (x-axis):

        v_{ox} = v_{o} *cos (58.0 deg)

  • The horizontal displacement can be simply calculated as follows:

        x = v_{ox} *t

  • Vertical movement:
  • As the vertical and horizontal are independent each other (due to they are perpendicular, so there is no projection of one movement on the other), in the vertical direction, all happens as if would be a body thrown upward with a given initial vertical velocity.
  • This velocity can be found as the projection of the velocity vector on the vertical direction (y-axis):

        v_{oy} = v_{o} *sin (58.0 deg) (1)

  • Once in the air, the gravity will cause that the froghopper be slow down, till it reaches to the maximum height, where it will come momentarily to an stop.
  • In that moment, we can apply the following kinematic equation:

        v_{fy} ^{2} -v_{oy} ^{2} = 2*g*h_{max}

  • where vfy = 0, g = -9.8m/s2, hmax = 52.7 cm= 0.527 m
  • Replacing by the givens, we can solve for voy:

        v_{oy} =\sqrt{2*g*h_{max}} = \sqrt{2*9.8m/s2*0.527m} =3.21 m/s

  • From the equation (1), we can solve for the magnitude of the initial velocity, v₀:

        v_{o} = \frac{v_{oy}}{sin 58.0} =\frac{3.21m/s}{0.848} = 3.79 m/s

B)

  • With the value of the magnitude of the initial velocity, we can find the horizontal component vox, as follows:

        v_{ox} = v_{o} *cos (58.0 deg) =\\  \\ 3.79 m/s * cos (58.0deg) = 2.01 m/s

  • In order to know the horizontal distance travelled, we need to find the time that the insect was in the air.
  • We can use the equation for the vertical displacement, replacing this value by 0, as follows:

       y = 0 = v_{oy} *t -\frac{1}{2} * g *t^{2}

  • Replacing by  the givens, and rearranging terms, we can solve for t:

        t_{air} =\frac{2*v_{oy} }{g} = \frac{2*3.21 m/s}{9.8 m/s} = 0.66 s

  • Finally, we find the horizontal displacement, as follows:

       x_{max}  = v_{ox} *t_{air} = 2.01 m/s * 0.66 s \\ \\ x_{max} = 1.33 m

  • The horizontal distance covered by  the froghopper was 1.33 m.
4 0
3 years ago
We spend our lives in visible light without risks to our health. Yet exposure to UV waves in sunlight can cause skin cancer. Wha
Trava [24]
The correct answer is
<span>B) UV waves are higher frequency and carry more energy. 

In fact, UV waves have higher frequency than visible light. For comparison, visible light has frequency in the range 430-770 THz (</span>10^{12} Hz)<span>, while ultraviolets (UV) have frequency higher than these values (at the order of 1 PHz, </span>1\cdot 10^{15}Hz).

The energy of electromagnetic radiation is proportional to its frequency, according to the equation
E=hf
where h is the Planck constant and f is the frequency. We see that the higher the frequency, the greater the energy, so UV waves carry more energy than visible light.
3 0
3 years ago
Read 2 more answers
A charge of 6.4x 10^-7 c experiences an electric force of 1.8 x10^-1 N. What is the electric field strength ?
laila [671]
Electric
field strength = Electric force/charge
E = F/q
E = (1.8×10^-1) / (6.4×10^-7)
E = 2.81×10^5 NC^-1

Hope it helped!
5 0
3 years ago
Gravitational pull between 2 objects is determined by which of the following?
vampirchik [111]
Both distance between and mass of the 2 objects.
3 0
3 years ago
Read 2 more answers
Air is composed of many gases, while water is composed of a pure substance. Which best compares air and water?
natta225 [31]

Answer: c

Explanation:

C Air is a compound of two or more components that keep their own identifying properties, while water is composed of mixtures that combine to form a compound.

4 0
2 years ago
Read 2 more answers
Other questions:
  • What was your hypothesis? According to your data, do you think your hypothesis was correct? What is latent heat? How does it sho
    9·2 answers
  • Technician A says that engine parts should be be cleaned before a thorough test can be done to detect cracks. Technician B says
    11·1 answer
  • Science Question
    10·2 answers
  • In chemistry class, you are given 3 liquids: Liquid A, Liquid B, and Liquid C. They are each in their own beaker. One of these l
    9·1 answer
  • What makes up the unit joules?​
    13·1 answer
  • A student is on a balcony 15.6 m above the street. She throws a ball vertically downward at 10.7 m/s.
    13·1 answer
  • A force of 50 N was necessary to lift a rock. A total of 150 J of work was done. How far was the rock lifted? ​
    15·1 answer
  • A scientist measuring the resistivity of a new metal alloy left her ammeter in another lab, but she does have a magnetic field p
    8·1 answer
  • 2. a) A student obtained ice at 0°C from a refrigerator and placed it in a beaker on a
    11·1 answer
  • At what rate is thermal energy being generated in the 2R-resistor when  = 12 V and R = 3.0 ?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!