The complete question in the attached figure
we know that
the root mean square speed, is the square root of the average (mean) of all of the square of the speeds of individual particles in a gas.
step 1
find the square of the speeds of individual particles
2.8²----> 7.84
3.2²---->10.24
5.8²----> 33.64
7.3²----> 53.29
7.4²---> 54.76
average=[7.84+10.24+33.64+53.29+54.76]/5-----> 159.77/5----> 31.954
step 2
find the square root of the average
√31.954=5.65
therefore
the answer isthe option b) 5.7 m/s
Answer:
Im not sure ok
Step-by-step explanation:
Im trying to solve too
Answer:
176.39 inches or
14.70 feet
Step-by-step explanation:
Consider the right triangle made by Kristen, ground and shadow.
This triangle has one leg as 64 inches.
Next consider the right triangle formed by street light, ground upto shadow tip.
The two triangles have common angle of elevation and also another angle as 90 degrees.
Hence the two triangles would be similar
Also if A is the angle made by hypotenuse of both triangles with the ground we have

This value also equals by bigger triangle as

From these two we get
h = height of street light =
It took her 45 minutes to rest and it to her 45 minutes to bike the initial 8 miles. or .75 hours for both
Answer:
<em>The </em><em>val</em><em>ue</em><em> of</em><em> </em><em>x</em><em> </em><em>is</em><em> </em><em>D</em><em>.</em><em> </em><em>3</em><em>0</em>
Step-by-step explanation:
hope it works out!!!!