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choli [55]
3 years ago
13

Which of these changes do not involve forming or breaking chemical bonds?

Physics
2 answers:
Anon25 [30]3 years ago
5 0
Hi 
let me help you you out 

the answer is boiling ans melting 

everything else can form or break chemical bonds 

hope it helps 
kumpel [21]3 years ago
3 0
When bonds form or break, it is called a chemical change. Which changes the substance completely and it cannot go back to the original substance. 
Therefore, to answer this question correctly, we must find a physical property. Which can be a change in state and doesn't change the substance by breaking bonds or forming new bonds. 
D. Boiling and melting
Explanation:
Because when you melt, you change the physical state. Also when you boil something, you are not changing the bonds. That is because you can change it back to its original substance. It is a temperature change which makes it melt or boil. 
Hope I helped. :)
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4 0
4 years ago
A car travels 30 km north in 25 min. And 40 km east in 35 min. What is the total distance traveled
Stella [2.4K]

Answer:

70 km

Explanation:

Before answering, let's remind the difference between distance and displacement:

- Distance: the total length of the path covered, no matter in which direction

- Displacement: the distance in a straigth line between the final point and the starting point of the motion

In this problem, we are asked to find the total distance travelled. So, we can simply add the length of the two parts of the path, regardless of their direction:

d = 30 km + 40 km = 70 km

4 0
3 years ago
A plane with a mass of 6,800 kg is moving at a speed of 55.0 m/s. What is the kinetic energy of the plane?
ioda

The kinetic energy of plane is 10285000 J

Kinetic energy is defined as the energy possed by an object in motion. The mathematical representation of kinetic energy is given below:

<h3>KE = ½mv²</h3>

Where:

KE is the kinetic energy

m is the mass of the object

v is the velocity of the object.

With the above formula, we can obtain kinetic energy of the plane as follow:

Mass (m) = 6800 kg

Velocity (v) = 55.0 m/s

<h3>Kinetic energy (KE) =? </h3>

KE = ½mv²

KE = ½ × 6800 × 55²

KE = 3400 × 3025

<h3>KE = 10285000 J</h3>

Therefore, the kinetic energy of plane is 10285000 J

Learn more: brainly.com/question/24713075

7 0
2 years ago
Read 2 more answers
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