Because the coefficient of friction depends on the surface
Answer:
n=0.03928 moles
Moles of oxygen do the lungs contain at the end of an inflation are 0.03928 moles
Explanation:
The amount of oxygen which lung can have is 20% of 5 L which is the capacity of lungs
Volume of oxygen in lungs =V=5*20%= 1 L=
Temperature=T=
Pressure at sea level = P= 1 atm=
R is universal Gas Constant =8.314 J/mol.K
Formula:
Moles of oxygen do the lungs contain at the end of an inflation are 0.03928 moles
Answer:
The average speed of the runner is 18.2 km/h.
Explanation:
Hi there!
The average speed is calculated as the traveled distance over time:
speed = traveled distance / elapsed time to cover that distance
We have to find the speed in km/h, so let´s start converting the time into hours:
23 s · (1 min/60 s) = 0.38 min
15.38 min · (1 h / 60 min) = 0.26 h
Total time: 0.26 h + 2 h = 2.26 h
The distance traveled in km is:
25.5 mi · (1.61 km/ 1 mi) = 41.1 km
Then, the average speed will be:
speed = 41.1 km / 2.26 h = 18.2 km/h
The average speed of the runner is 18.2 km/h.
Answer is D - from the equation of electric field for point charge
Explanation:
PE= mgh
6 J= (3m) (9.81 m/s2) (mass)
mass=( 6)/(3×9.81)
mass= 0.20 Kg
