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Ludmilka [50]
3 years ago
12

PLZ HELP which of the following is an example of a physical change ​

Chemistry
2 answers:
Elena L [17]3 years ago
8 0

Answer:

C.matter changes,but no new substance is formed.

lubasha [3.4K]3 years ago
7 0

Answer:

D. A piece of food turns brown and starts to smell bad is the answer because it is physical change and physical change is permanent change

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What is the frequency of a wave with a wavelength of 6.40x10^4 meters?
yKpoI14uk [10]

Answer:

frequency = 0.47×10⁴ Hz

Explanation:

Given data:

Wavelength of wave = 6.4× 10⁴ m

Frequency of wave = ?

Solution:

Formula:

Speed of wave = wavelength × frequency

Speed of wave = 3 × 10⁸ m/s

Now we will put the values in formula.

3 × 10⁸ m/s = 6.4× 10⁴ m × frequency

frequency = 3 × 10⁸ m/s / 6.4× 10⁴ m

frequency = 0.47×10⁴ /s

s⁻¹ = Hz

frequency = 0.47×10⁴ Hz

Thus the wave with wavelength of 6.4× 10⁴ m have 0.47×10⁴ Hz frequency.

4 0
3 years ago
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Which sentence is a scientific statement? A. Long hair looks better than short hair. B. Brick structures insulate better than wo
solong [7]

D) There is a large, apelike creature living in the Himalayas is a scientific statement. The other statements are basically opinions.

Hope this Helps!!

7 0
4 years ago
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Most of the nadh that delivers electrons to the electron transport chain comes from which of the following processes?
Neko [114]
Most of the NADH that delivers electrons to the electron transport chain comes from the citric acid cycle and or the kreb's cycle.
4 0
3 years ago
Hydrochloric acid, or HCl, reacts with solid NaOH
yuradex [85]

Answer:

NaCI and H20


To simplify it.

5 0
4 years ago
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Determine the hydroxide ion concentration in a solution that is 0.018 m naoh.
nydimaria [60]
As we know, NaOH is a strong Base and completely dissociates in water as given below,

                            NaOH + H₂O    →   Na⁺ ₍aq₎  +  OH⁻ ₍aq₎

So, the concentration of OH⁻ Ions will be the same as that the concentration of NaOH i.e. 0.018 M.
So,
                                     [OH⁻]  =  0.018 M
5 0
4 years ago
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