Answer:
Non metals are brittle solids.
Explanation:
The option A is correct,
Non metals are brittle solids.
It is the property of non metals. They can not be stretched into thin wire if stress is applied non metals brake down.
All other options are incorrect because,
B = Non metals are often malleable
It is the property of metals. Metals can be malleable into think sheets.
C = Non metals often conduct electricity.
It is the property of metals. Metals conduct electricity because of availability of free electrons.
D = Non metals are often ductile.
It is the property of metals. They can stretched into thin wire.
Convection
because convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
There is no delay because the effects of gravity are constantly acting on bodies of water. Hence, option D is correct.
<h3>What is the gravitational effect?</h3>
Gravitation or just gravity is the force of attraction between any two bodies.
The Moon exerts over twice the gravitational pull of the Sun on Earth's tides because of its proximity to Earth. -The lunar tidal bulges are about twice the size of the solar tidal bulges. -The Sun's contribution to the tides is less than that of the Moon.
When the sun and moon are perfectly unaligned (they form a 90-degree angle relative to the earth), there are still tides because the moon's gravitational gradient is stronger than the sun's. The sun's gravitational gradient never completely cancels out the moon's.
Hence, option D is correct.
Learn more about the gravitational effect here:
brainly.com/question/14433868
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Answer:
Number 4 is an example of a chemical reaction
Explanation:
heThe chalk is reacting with the vingear which is creating a new substance. The new substance is the gas that the reaction gives off.
The focal length of the mirror is 15 cm
From the question given above, the following data were obtained:
Object distance (u) = 30 cm
Image distance (v) = 30 cm
<h3>Focal length (f) =? </h3>
The focal length of the mirror can be obtained as follow:
<h3>Invert </h3><h3>f = 15 cm</h3>
Therefore, the focal length of the mirror is 15 cm
Learn more: brainly.com/question/1392083
