You would get 13.7
mi/51mm=3.5mm/13mm
by solving it you will B13.7mm
Answer:
Volume of each grain of sand:

radius of the spherical grain is given,

The grains are made up of silicon dioxide.
The density is equal to 
Then, the mass of each grain is given by:

Answer:
The white car will cover the most distance every second.
Explanation:
The formula for the uniform speed of an object is given as follows:

where,
s = distance covered by the object
v = speed of the object
t = time required
Now, if we assume time to be constant at 1 s. Then the distance covered by each car will be directly proportional to the speed of the car. Hence, the car with the greatest speed will travel the greatest distance in 1 second.
We, have:
Speed of white car > Speed of red car > Speed of green car
<u>Therefore, the white car will cover the most distance every second.</u>
The trash bag will gain gain speed in till hitting the ground and passably exploding on impact of the ground depending on the strength of the trash bag it may rip during the fall.
If this was not what you were looking for please explain what you need in more detail.
Amagat's law of additive volumes states that we can simply add up the individual volumes of each gas (provided they are at the same temperature and pressure) to get the total volume of the mixture. Conservation of volume is an acceptable assumption for gases (but not always for liquid mixtures). This works for gases since the molecules are very small and only take up a minimal amount of space in a gas.