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
WARRIOR [948]
3 years ago
15

Which would show an example of how physical changes are reversible?

Physics
2 answers:
kondor19780726 [428]3 years ago
8 0

Answer:

Melting tin and then cooling it into a mold

Explanation:

When you melt something, and when it cools it returns to its physical state, therefore the physical changes are reversible. For example, take chocolate. When chocolate melts its liquid, then when it's in a colder situation it becomes solid again and so on, the changes are reversible.

il63 [147K]3 years ago
8 0

Answer:

C

Explanation:

the physical change was the gold bar being cut and if it is put back together the physical change is reversed

You might be interested in
Two particles are moving along the x axis. Particle 1 has a mass m₁ and a velocity v₁ = +4.7 m/s. Particle 2 has a mass m₂ and a
nirvana33 [79]

Answer:

m₁ / m₂ = 1.3

Explanation:

We can work this problem with the moment, the system is formed by the two particles

The moment is conserved, to simulate the system the particles initially move with a moment and suppose a shock where the particular that, without speed, this determines that if you center, you should be stationary, which creates a moment equal to zero

    p₀o = m₁ v₁ + m₂ v₂

    pf = 0

    m₁ v₁ + m₂ v₂ = 0

    m₁ / m₂ = -v₂ / v₁

    m₁ / m₂=  - (-6.2) / 4.7

     m₁ / m₂ = 1.3

Another way to solve this exercise is to use the mass center relationship

    Xcm = 1/M    (m₁ x₁ + m₂ x₂)

We derive from time

   Vcm = 1/M   (m₁ v₁ + m₂v₂)

As they say the velocity of the center of zero masses

    0 = 1/M   (m₁ v₁ + m₂v₂)

   m₁ v₁ + m₂v₂ = 0

    m₁ / m₂ = -v₂ / v₁

   m₁ / m₂ = 1.3

4 0
3 years ago
What property do protons can electrons have that neutrons do not ?
Vesna [10]

Answer:

Protons and electrons are charged particles. Neutrons have no charge.

4 0
3 years ago
The two forces in each pair can either both act on the same body or they can act on different bodies. The two forces in each pai
kotykmax [81]

Answer: The given statement is false.

Explanation:

According to Newton's third law of motion, every action has an equal and opposite reaction. So, when we apply force in one direction on an object then the object also applies a force in the opposite direction.

Hence, it is true that two forces in each pair of forces act in opposite directions.

For example, when we push a wooden box of 20 kg in the forward direction then the box will also apply a force in the opposite direction.

But the statement two forces in each pair can either both act on the same body or they can act on different bodies is false.

5 0
3 years ago
I want to know about the inventions caused due to rain. Like the Benjamin Franklin's Lightning Conductor. I have to make a chart
nydimaria [60]
Franklin had been waiting for an opportunity like this. He wanted to demonstrate the electrical nature of lightning, and to do so, he needed a thunderstorm.

He had his materials at the ready: a simple kite made with a large silk handkerchief, a hemp string, and a silk string. He also had a house key, a Leyden jar (a device that could store an electrical charge for later use), and a sharp length of wire. His son William assisted him.

Franklin had originally planned to conduct the experiment atop a Philadelphia church spire, according to his contemporary, British scientist Joseph Priestley (who, incidentally, is credited with discovering oxygen), but he changed his plans when he realized he could achieve the same goal by using a kite.
3 0
3 years ago
What is the medium through which the wave is moving?
irakobra [83]

Rope or one could consider it to be C to B or A to D

5 0
3 years ago
Read 2 more answers
Other questions:
  • A team of ecologists are studying four different ecosystems with varying levels of biodiversity. The ecologists categorize the d
    13·1 answer
  • What landform is created when magma squeezes between rock layers to form a hardened slab of rock?
    12·1 answer
  • A car has a force of 2000N and a mass of<br> 1000kg. What is the acceleration of the<br> car?
    11·1 answer
  • The combined-gas law relates which of these?
    5·1 answer
  • How is circular motion different from variable motion?
    9·1 answer
  • In the fusion reaction occurring in the Sun, how does the mass of helium atom formed compare to the mass of the hydrogen atoms?
    12·1 answer
  • how does the electric force between two charged particles change if the distance between them is increased by a factor of 3? a.
    10·2 answers
  • In science, the inquiry process involves observing, questioning, ________, and summarizing.​
    12·2 answers
  • An 800-kHz radio signal is detected at a point 4.5 km distant from a transmitter tower. The electric field amplitude of the sign
    13·1 answer
  • What is the difference in force of a car and a tractor
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!