Physics, 06.11.2019 14:31 lolabizzer

Which two forces act directly on objects that are unable to be viewed by the unaided eye?
electromagnetic and strong
gravitational and electromagnetic
strong and weak
weak and gravitational

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Answer from: bri9263

strong and weak

Explanation:

There are four fundamental forces in the universe:

- Gravitational force: this force acts between all objects having mass, and it is always attractive. Its strength is very weak compared to the other forces, so its effects can only be seen on very massive objects (such as planets, stars, etc.)

- Electromagnetic force: this force acts between all objects having electrical charge, and it can be either attractive or repulsive. The effects of this force can be osbserved both on daily-life objects or on small particles.

- Strong nuclear force: this force is responsible for keeping neutrons and protons together in the nuclei of the atoms, and it acts on very small scales. Due to its very short range of action, the effects of this force can only be observed on microscopic scales.

- Weak nuclear force: this force is responsible for the decays of atoms (for example, it is responsible for certain radioactive decays). Due to its very short range of action, the effects of this force can only be observed on microscopic scales.

Based on the definitions of the four forces listed above, we can state that the two forces that act on objects unable to be viewed by unaided eye are

strong and weak

Because effects of the the other two forces (gravitational and electromagnetic) can be also observed on large-size objects.

Answer from: Quest

the answer is a)

mark brainliest

Answer from: Quest

Acetic acid /əˈsiːtɪk/, systematically named ethanoic acid /ˌɛθəˈnoʊɪk/, is a colourless liquid organic compound with the chemical formula ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called glacial acetic acid. vinegar is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to polyvinyl acetate and cellulose acetate. it is classified as a weak acid since it only partially dissociates in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7 3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366 chemblchembl539 chemspider171 drugbankdb03166 echa infocard100.000.528ec number200-580-7e numbere260 (preservatives)gmelin reference1380iuphar/bps1058keggd00010 meshacetic+acidpubchem cid176rtecs numberaf1225000uniiq40q9n063p un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4) key: qtbsbxvteameqo-uhfffaoysa-n smilescc(o)=o

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Which two forces act directly on objects that are unable to be viewed by the unaided eye?
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