Answer: 1.25 miles per minute
Explanation:
Average speed is the rate of change of total distance covered per unit time.
i.e Average speed = (Total distance / Time taken)
Total distance covered = (25miles + 40 miles + 70 miles + 15 miles)
= 150 miles
Total time taken = ( 15 minutes + 30 minutes + 1 hour + 15 minutes) = 120 minutes
Since 60 minutes = 1 hour, the total time taken is 120 minutes
Now, apply Average speed = (Total distance / Time taken)
= (150 miles / 120 minutes)
= 1.25 miles per minutes
Thus, Joseph drove with an average speed of 1.25 miles per minute.
Newton's third law states that every action has an equal and opposite reaction. The action and reaction forces are pairs of opposing forces.
In the given examples all three obey Newton's third law.
B) Action force: John pulls the door handle
Reaction: door handle gets pulled
C) Action force: Tire pushes on road
Reaction: The road pushes on the tire, vehicle moves
D) Action force: Exhaust pushes out of a rocket
Reaction: Rocket is pushed forward
Ans A) All these are examples of Newtons third law
132.67 K is the temperature at which 55 grams of chlorine gas exert a pressure of 245 kPa at a volume of 3.4 liter.
Explanation:
Data given:
mass of chlorine gas = 55 grams
atomic mass of chlorine gas = 71 grams/mole
pressure of chlorine gas = 245 kPa 0R 2.41 atm
volume of the chlorine gas = 3.4 litres
temperature of the chlorine gas = ?
R = 0.08201 Latm/moles K
n =?
Assuming that chlorine behaved like ideal gas, the formula used will be,
PV = nRT
number of moles = 
number of moles= 
number of moles = 0.77
putting the values in ideal gas equation:
T = 
T = 132.67 K
temperature is 132.67 K
No 8) one mole at all side.
no 9)one mole at N2 and three mole at H2 to get two mole of NH3.
no 10) four mole of Al and three mole of O2 to get two mole of Al2O3.
no 12) two mole of Na and two mole of H2O to get two mole of NaOH and one mole of H2.
no 13) one mole of H2SO4 and two mole of NaOH to get two mole of H2O.
