I believe the answer is A) Less work in less time.
Answer and explanation:
When you are changing a car tire, the most important thing is to keep the total diameter as equal as possible.
The total car tire diameter can be calculated as:
![D_{tot orig}=\frac{195 \cdot 75}{2540 \cdot 2}+15''=26.5''](https://tex.z-dn.net/?f=D_%7Btot%20orig%7D%3D%5Cfrac%7B195%20%5Ccdot%2075%7D%7B2540%20%5Ccdot%202%7D%2B15%27%27%3D26.5%27%27)
The profile of this tire is 75 (the higher/taller relation), therefore a 5 percent lower profile would be:
pr=0.95·75=71.25
The problem is that the profiles are normalized and the nearest profile available is 70.
If we take a theorical tire with a profile of 71.25:
![D_{tot orig}=D_{new}\\\frac{195 \cdot 75}{2540 \cdot 2}+15''=\frac{X \cdot 71.25}{2540 \cdot 2}+15''\\X=205.26](https://tex.z-dn.net/?f=D_%7Btot%20orig%7D%3DD_%7Bnew%7D%5C%5C%5Cfrac%7B195%20%5Ccdot%2075%7D%7B2540%20%5Ccdot%202%7D%2B15%27%27%3D%5Cfrac%7BX%20%5Ccdot%2071.25%7D%7B2540%20%5Ccdot%202%7D%2B15%27%27%5C%5CX%3D205.26)
The theorical tire size should be 205/71 R15.
If we look for a real tire size, we should look for a tire with a diameter nearest to 26.5'' and a profile of 70.
The best option for real tire size is: Tire 225/70 R14 (wheel diameter of 26.4'') or 205/70 R15 (wheel diameter of 26.3'').
Average Velocity = Total Displacement / Total time
1st part of journey, 350 km at velocity 125 km/h
Time = 350 / 125 = 2.8 hours.
2nd part of journey, 220 km at velocity 115 km/h
Time = 220 / 115 = 1.9 hours
Average Velocity = Total Displacement / Total time
= (350 + 220) / (2.8 + 1.9)
= 570 / 4.7 ≈ 121.3 km/hr
Average Velocity ≈ 121 km/hr due south.
Option C.
I'd have to say that the list of choices doesn't go far enough.
Advances in Astronomy have been occurring for at least the past two millennia (2000 years). Maybe longer.
Answer:
1.2 kg
Explanation:
Let UP ramp be the positive direction
F = ma
T - Wt || - Ff = m(0)
mg - Μgsinθ - μΜgcosθ = 0
m(9.8) - 13sin35 - 0.36(13)cos35 = 0
m = 13(sin35 + 0.36cos35) / 9.8
m = 1.15205... ≈ 1.2 kg