Why is an objects density expressed as a combination of two units

Answers

Answer 1

Answer: Except for mass, length, time, and electric charge, EVERY quantity is
a combination of units ... of THOSE units in fact. Hadn't you noticed ?

Answer 2

Answer: An objects density is expressed as a combination of two units because the equation for density is Mass/Volume=Density. Therefore, both the mass and the volume retain a unit measure and when they are put together they create an expression that is a combination of two units such as kg/m^3 or g/cm^3.

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How many independent variables does a good investigator use in his or her experiment?

Answers

Answer:

You should generally have one independent variable in an experiment. This is because it is the variable you are changing in order to observe the effects it has on the other variables.

HOPE THIS HELPED!!!!!!!!!!!!XDDDDDDDDD

What force keeps you from falling through your bed when you lie on it to sleep

Answers

I think it has to do with the electrostatic repulsion of the electrons.

There is electrostatic repulsion between your electrons and those of the floor.

Please Explain two ways nitrogen gas in the atmosphere is changed into nitrogen compounds that plants can use. -Thank you all in advance! I do need this by 9:20 Am Eastern Time tomorrow

Answers

Not sure if this is what your looking for, but hope it helps. Nitrogen gas can be changed into nitrogen compound through nitrogen fixation, which is the conversion of nitrogen gas to ammonia, that are absorbed by the plant to make protein. Another way is through animals eating plants and obtaining nitrogen, which is later released, by decomposes, when the organism dies.

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5.8 m/s2 for 3.3 seconds. It then continues at a constant speed for 9.8 seconds, before applying the brakes such that the car’s speed decreases uniformly coming to rest 255.79 meters from where it started. The yellow car accelerates uniformly for the entire distance, finally catching the blue car just as the blue car comes to a stop.3)How far does the blue car travel before its brakes are applied to slow down?

Answers

Well, the car gets to 5.8*3.3=19.14 m/s, getting to 5.8*3.3*3.3=63.162 meters from the start. For 9.8 secons it goes 187.572 meters, a total of 250.734. So, in 5.056 meters, it stopped uniformly. The speed dropped from 19.14 to 0 in 5.056 meters. There was a formula which didn't use time, but I've forgotten it. It would have given us the deceleration and then one could find the time through a 2nd degree equation. The timing for the first two parts is already known.
Either way, we've calculate more than we need to know for this question. You can cut the answer from that 250.734 distance.

Answer:

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Explanation:

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The speedometer in your car reads 55mi/h this represents ___ of the car