Hufflepuff and Ravenclaw are having their annual tug of war contest. Each team can have 20 students. What is the most important
2 answers:
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<u>Answer:</u> The correct statement is combining baking soda and vinegar will cause a chemical change.
<u>Explanation:</u>
A chemical reaction is defined as the reaction in which two or more chemical substances react to form two or more different chemical substances
A new substance (product) is formed in a chemical reaction when the bonds between the reactants are broken so that the new bonds between the products can be formed.
A physical process is defined as the process in which the physical state of matter takes place. Like, in the process of vaporization, a liquid state changes to the gaseous state without changing the composition of species.
When baking soda (Sodium bicarbonate) is reacted with vinegar (acetic acid), it leads to the formation of sodium acetate, water, and carbon dioxide.
A new compound is getting formed in this process which is denoted by the chemical equation:
Hence, the correct statement is combining baking soda and vinegar will cause a chemical change.
Answer:
a) On Earth
490N
b) On the Moon
85N
c) On Mars
185N
d)in outer space traveling with constant velocity.
0
Explanation:
The weight is defined as:
(1)
Where m is the mass and g is the gravity
a) On Earth
Then, equation 1 can be used:
but 1N = Kg.m/s^{2}
Hence, the weight of the astronaut on Earth is
b) On the Moon
Hence, the weight of the astronaut on the Moon is
c) On Mars
Hence, the weight of the astronaut on Mars is
(d) in outer space traveling with constant velocity.
Tanking into consideration that the astronaut is traveling in outer space at a constant velocity, it can be concluded that the acceleration will be zero.
Remember that the acceleration is defined as:
Since the acceleration is the variation of the velocity in a unit of time.
Therefore, from equation 1 is gotten.
Remember that g is the acceleration that a body experience as a consequence of the gravitational field.