3 years ago

How does the velocity of a falling object change over time?

Chemistry

1 answer:

valentinak56 [21]3 years ago

7 0

I’m pretty sure the velocity increases as the time of an object falling increases :)

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A race car is driven by a professional driver at 99 . What is this speed in and ? 1 mile = 1.61 kilometers 1 hour = 60 minutes E

slavikrds [6]

Answer: The speed is equivalent to 159.39 kilometers per hour or 2.65 kilometers per minute.

Explanation:

Given, The speed of a race car = 99 miles/ hour

To convert the speed into kilometers per hour and kilometers per minute

Since 1 mile = 1.61 kilometers

So, Speed of car = (99 ) x (1.61 )

= 159.39 kilometers per hour.

Also, 1 hour = 60 minutes

Then, Speed of car = (159.39) ÷60

= 2.6565≈2.65 kilometer per minute.

Hence, the speed is equivalent to 159.39 kilometers per hour or 2.65 kilometers per minute.

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4 years ago

P and Q are two substances such that the melting point of P and the boiling point of Q are the same. If P is a solid at a certai

Nimfa-mama [501]

Answer:

Explanation:

Firstly, it should be noted that melting and freezing points are the same. Thus, when a substance melts at a certain temperature, it means it can also start freezing/solidifying at that same temperature. That been said, when the substance P is a solid at a certain temperature, the other compound Q will boil at that same temperature and hence will be a gas at that same temperature.

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3 years ago

The balanced equation for the combustion of Hexane,C6H14 , is

shusha [124]

Answer:

$2C _{6}H _{14} + 19O _{2}→12CO _{2} +14H _{2} O$