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hram777 [196]
3 years ago
5

What does it mean to say the mass is conserved during a physical change ?

Physics
2 answers:
vesna_86 [32]3 years ago
5 0

The total mass of the substance remains the same from beginning to end. The physical properties of the substance, such as size and shape, may change. The amount of matter in the substance does not change.

Olin [163]3 years ago
4 0
Mater doesn't just appear or disappeared. Chemical elements are still there just the connections and how it combines changes.

So what goes into your chemical eqation must still exist after the change.
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Please help me do this problem
Digiron [165]

Answer:

i) acceleration from B to D is 0, because the velocity is constant (stays the same)

ii) whatever units of distathat might be, we can calculate the number:

for 4 time-steps (2 to 6) the velocity is 6 per time step, that makes 24 distance units in these 4 time steps. it's the same the area underneath the graph.

there is also the vertical line from 0 to 2. we can calculate that distance like the area of a triangle with 2*6 / 2 = 6

the total distance from 0 to D is therefore 30

4 0
3 years ago
The advantage of nuclear power include the low production of air pollution and the fact that is not produce a toxic waste materi
Inessa05 [86]
False, it does create pollution form the smoke stacks and after the process is done they have barrels of toxic waste 
5 0
3 years ago
Give one example of something you use or make at home that is an example of solubility.
Nana76 [90]

Answer:

Salt can dissolve in water making it an excellent soluble for water

5 0
3 years ago
Read 2 more answers
If it takes 100 N to get a 10 kg object to accelerate at 10m/s/s, how much force will it take to get a 20 kg object to accelerat
yan [13]

Answer: C) 200 N

Explanation:

The force F is defined as:

F=m.a

Where:

m=20 kg is the mass of the object

a=10 m/s^{2} is the acceleration

Then:

F=(20 kg)(10 m/s^{2})

Finally:

F=200 N

Hence, the correct option is C.

7 0
3 years ago
3. Specify the wrong sentences.
soldi70 [24.7K]

Answer:

a: false

b: True

c: i dont know

Explanation:

4 0
1 year ago
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