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andrew11 [14]
3 years ago
11

What happens to the pen?what could have caused the pen's motion? grade 8 asap

Chemistry
1 answer:
DedPeter [7]3 years ago
5 0

Answer:

One is tension force that acts on the string and the other one is gravitational force that is acting on the pen and is therefore, the one that pulls the pen towards the ground. Therefore, the pen's motion is caused by the unbalanced force acting on the pen.

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Identify two acids and two bases that you use or come into contact with in an average week. Identify uses for each substance.
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Explanation:

Two acids we come into contact with in an average week

  1. Vinegar is an 10% solution of acetic acid (CH_3COOH)in water. Used in salad dressing and while cooking food. It has a sour taste.
  2. Citric acid present in fruits and vegetables like : lemons, orange, tomatoes etc. It is a weak organic acid with sour taste.

Two bases we come into contact with in an average week.  

  1. Baking soda (NaHCO_3) is used in baking food like: cakes, cookies, breads. Baking soda is one of the ingredient while baking breads and cakes.
  2. Caustic soda (NaOH) is used for preparation of detergents, papers , soaps etc. We use soaps and detergents for washing.
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A bowling ball and basketball collide, what direction do they go and how is energy transferred?
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Explanation:

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