Roberto and his dad drove from town a to town b taking the long way, ate lunch and then came back using a
straight short cut. what distance did roberto and his dad travel?
a)
20 km
b)
50 km
c)
70 km
o km

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The distance traveled by Roberto and his dad is 70 km

Explanation:

We are given:

Roberto and his dad drove from town A to town B.

= Distance traveled by Roberto and his dad during this is 50 km (as per the image)

Then, both of them came back by taking a straight short cut.

= Distance traveled by Roberto and his dad during this is 20 km (as per the image)

We know that, distance shows an additive property. This means that distance can be added.

Total distance traveled =

Hence, the distance traveled by Roberto and his dad is 70 km

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.