2 years ago

3 characteristics of chemical change

2 answers:

6 0

Answer: in chemical changes, usually new substances are formed. Signs of chemical changes are change of colour, temperature and formation of precipitation

gtnhenbr [62]2 years ago

3 0

Answer:

A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

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An interstellar space probe is launched from Earth. After a brief period of acceleration it moves with a constant velocity, 70.0

sleet_krkn [62]

Answer:

22.26 years

, 15.585 light years , 11.13 light years

Explanation:

$t' = t/(\sqrt{1-(v/(c*v)/c)}$

= $15.9/\sqrt{(1-0.7*0.7)}$

= 22.26 years

0.7*c*22.26 years

=15.585 light years

0.7*c*15.9

=11.13 light years

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Elza [17]

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Which statement best describes how the period and frequency of electromagnetic waves change between gamma rays and microwaves?

Dimas [21]

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