What is free-fall acceleration near earth's surface

Answers

Answer 1
Answer: free fall is when the only force acting on an object is gravity
Answer 2
Answer: Near Earth's surface, the distance between the object that is falling and the center of Earth does not change very much. Thus, the force given by the law of universal gravitation depends only on the mass of the object that is falling.

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The reduced vapor pressure at high altitudes causes a liquid to boil at a temperature.A. Lower B. Higher
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When a chemical reaction is in equilibrium, a. the reaction is proceeding at its maximum rate. b. there is no net change in the amount of substrates or products. c. the reaction has stopped. d. there are equivalent amounts of substrates and products.
An atom has 6 electrons in its valence shell. how many unpaired electrons does it have?

What do hydrogen ions and hydroxide ions come together to form?a. a base
b. water
c.a tritant
d. an acid

Answers

They come together to form water. I hope this helps. Let me know if anything is unclear. That is the bases of a neutralization reaction.

Which two characteristics are associated with metals?(1) low first ionization energy and low electronegativity
(2) low first ionization energy and high electronegativity
(3) high first ionization energy and low electronegativity
(4) high first ionization energy and high electronegativity

Answers

Answer:

low first ionization energy and low electronegativity

Explanation:

Final answer:

Metals are typically characterized by low first ionization energy and low electronegativity. This is because metals can easily lose electrons to become positive ions and do not attract electrons strongly.

Explanation:

Two properties that are typically associated with metals are low first ionization energy and low electronegativity. Therefore, the correct option is (1).

Ionization energy is the energy required to remove an electron from an atom. Metals have low first ionization energy because they can easily lose an electron to become positive ions. Electronegativity is a measure of the ability of an atom to attract electrons. Metals have low electronegativity because they do not attract electrons strongly.

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What is the melting point of wrought iron in degrees celcius?

Answers

The melting point of iron is 2,800°F or 1,538°C.

25. In the formula for a molecular compound, which atom generally comes first? You may wentto refer to a periodic table.

Answers

Answer:

For organic compounds, carbon and hydrogen are listed as the first elements in the molecular formula, and they are followed by the remaining elements in alphabetical order. For example, for butane, the molecular formula is C 4 H 10.

Explanation:

Which is evidence that a chemical Reagan occurred?A. A phase change occurs
B. A new gas is observed in the form of bubbles
C. Red and yellow paint mixing to make orange
D. The temperature of the substance remains constant updates

Answers

To solve such this we must know the concept of chemical reaction. Therefore, the correct option is option B that is  a new gas is observed in the form of bubbles.

What is chemical reaction?

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

The characteristics of chemical reaction are:

Evolution of a Gas

Change in temperature

Change in color

Formation of Precipitate

The evidence that a chemical reaction has occurred is  a new gas is observed in the form of bubbles.

Therefore, the correct option is option B that is  a new gas is observed in the form of bubbles.

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Igneous rocks with an andesitic composition ________.

Answers

are found along volcanic island arcs