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
Lunna [17]
3 years ago
8

Which of these is an example of a chemical change?

Physics
2 answers:
nadya68 [22]3 years ago
6 0
1 - fireworks exploding
lora16 [44]3 years ago
3 0

Answer:

Fireworks Exploding

Explanation:

You might be interested in
Gold, which has a mass of 19.32 g for each cubic centimeter of volume, is the most ductile metal and can be pressed into a thin
Dennis_Churaev [7]

Answer:

area = 5733.33  cm²

length = 5.47 ×10^{7} cm

Explanation:

Given data

density = 19.32 g/cm³

mass = 33.16 g

thickness = 3.000 µm = 3 ×10^{-4} cm

radius r = 1.000 µm = 1 ×10^{-4} cm

to find out

area of the leaf and  length of the fiber

solution

we know volume formula that is

volume = mass / density

volume = 33.16 /  19.32

volume = 1.72 cm³

we know that volume = thickness × area

so area

area = volume / thickness

area = 1.72 / 3 ×10^{-4}

area = 5733.33  cm²

and

we know volume = πr²L

so L = volume /  πr²

length = 1.72 / π(1×10^{-4})²

length = 5.47 ×10^{7} cm

3 0
3 years ago
A velocity selector in a mass spectrometer uses an electric field of 4.4 x 105 V/m. What magnetic field strength (in Tesla) is n
Brut [27]

Answer:

  B = 9.16 10⁻²  T

Explanation:

The speed selector is a configuration where the electric and magnetic force has the opposite direction, which for a specific speed cancel

       q v B = q E

       v = E / B

       B = E / v

Let's calculate

      B = 4.4 10⁵ / 4.8 10⁶

      B = 9.16 10⁻²  T

5 0
3 years ago
I DO NOT WANT LINKES OR …………..
il63 [147K]

1st B is correct option

2nd D is correct option

4 0
3 years ago
Read 2 more answers
3 facts about the concept or term of tectonic plates 
Agata [3.3K]
1) Plates movement happens very slowly.
2) The earth's lithosphere is divided into pieces
3) they are caused by convection currents in the asthenosphere (upper mantle)

8 0
3 years ago
Whats the answer???????????????????????
murzikaleks [220]

The answer is 30 ... same as the Atomic number.

4 0
3 years ago
Other questions:
  • Which layer of ground contain organic matter and tiny rock particles
    8·1 answer
  • which part of a circuit creates an electric force field that makes it possible for the circuit to work
    12·1 answer
  • Why does the frequency of a wave increase as the wavelength decreases?
    7·2 answers
  • A 30 N block is being pulled along a horizontal surface with an acceleration of 6 m/s2 by a rope. The coefficient of kinetic fri
    13·1 answer
  • A straight wire carries a current of 40 A in a uniform magnetic field (magnitude = 80 mT). If the force per unit length on this
    15·2 answers
  • Multiply 0.00032 cm by 4.02 cm and express the answer in scientific notation
    7·2 answers
  • How much greater is the light-collecting area of a 6-meter telescope than a 3-meter telescope? How much greater is the light-col
    6·1 answer
  • List two ways of recording or measuring absolute time
    15·1 answer
  • Four satellites are in orbit around the Earth. The heights of their four orbits
    11·1 answer
  • A clothes dryer in a home draws a current of 10 amps when connected on a special 220-volts household circuit.what is the resista
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!