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3 years ago

Can someone help your amiga :(??

Chemistry

1 answer:

bekas [8.4K]3 years ago

4 0

i think the answer is C but don't take my word for it

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When light strikes a transparent material, most of the light is absorbed or reflected.

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When light strikes a transparent material, most of the light passes through it it doesn't absorb or reflect it

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3 years ago

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In a combustion reaction, one of the reactants is always _______________.

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In a combustion reaction, one of the reactants is always oxygen.

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Which is not an indicator for a chemical change?

Anastasy [175]

Answer:

Explanation:

Because it does not change entirely.

8 0

3 years ago

Need help please it must be right thank u

vova2212 [387]

Answer:

13. c) Net

14. a) Gravity

15. d) Watt

16. b) the speed will suddenly decrease.

Explanation:

13. The net force is combination of all individual forces.

14. When we sit on the chair , then gravitational force acts on our body due to our mass.

F = mg

here, F = force due to gravity , g = acceleration due to gravity and m= mass of the body

15.Power : It is the force acting per unit area .It is discovered by James Watt

$Power =\frac{force}{area}$

$Power =\frac{N}{m^{2}}$

Its unit is $Nm^{-2}$ .In honor of the Scientist , its unit is Watt.

Watt = $Nm^{-2}$

16. When the parachute first opens , the speed of the skydiver suddenly decreases because of the resistance offered by the air particles.(For more details look at the figure attached)

17. Transfer of momentum from one object to other is the law of conservation of momentum (NOT ENERGY).So the answer is False

 Law of Conservation of Momentum :  Total momentum of a system is conserved if no external force attack on it. Momentum can neither be created nor destroyed but transferred from one form to other.

7 0

3 years ago

Why is no dew formed on a windy day or when the sky is cloudy?

joja [24]

Dew forms when the air just above the ground is cooled to its dew point. The air above the ground is cooled because the ground radiates heat into space. If there are clouds overhead the clouds reflect the heat back to the ground so it does not cool and o dew forms. If it is windy then the air just above the ground to the dew point and no dew forms. Thus to form dew you need a still clear keeps on getting mixed with the air higher up and the air does not cooled to the dew point and no dew forms.

4 0

3 years ago