He has 1 1/30 gallons, or 31/30 gallons, you can find this by setting all the fractions to a common denominator and adding them
D
Because the rest of the answers are illogical
Answer:
The horizontal reaction force is 230.3 N.
Explanation:
Given that,
Length l= 14.0 m
Weight of ladder F = 490 N
Angle = 65°
Weight of firefighter F'= 850 N
Height l'= 4.10 m
Suppose horizontal force magnitude N direction vertical force magnitude N direction
We need to calculate the horizontal reaction force
Horizontal reaction force = normal reaction from wall
Vertical reaction force = weight of ladder +weight of man


We need to calculate the moment about bottom is zero

Put the value in the equation



Hence, The horizontal reaction force is 230.3 N.
Answer:
60 %
Explanation:
Efficiency is defined as the ratio of output power to the input power.
Input energy each hour = 9 x 10^12 J
Output energy each hour = 5.4 x 10^12 J
Efficiency = Output energy per hour / input energy per hour
Efficiency = (5.4 x 10^12) / ( 9 x 10^12) = 5.4 / 9 = 0.6
Efficiency in percentage form = 0.6 x 100 = 60 %