Answer:
Explanation:
kindly check the attachment below for detailed explanations. Thanks
Answer:
Q' = 8 KW.h
Q'=28800 KJ
Explanation:
Given that
Heat Q= 4 KW
time ,t = 2 hours
The amount of energy used in KWh given as
Q ' = Q x t
Q' = 4 x 2 KW.h
Q' = 8 KW.h
We know that
1 h = 60 min = 60 x 60 s = 3600 s
We know that W = 1 J/s
The amount of energy used in KJ given as
Q' = 8 x 3600 = 28800 KJ
Therefore
Q' = 8 KW.h
Q'=28800 KJ
Answer:
Explanation:
Given Preception time = 1.0 sec
Deceleration rate = 11 ft /sec2
Interpretation rate as = 3words /sec
The board consists of “WORK ZONE: 20 MPH SPEED ZONE”
Then Interpretation time = 2.0 sec
Decision time = 0.5 sec
Assume that the vehicle was traveling with 65mph
Perception Time
So, if you’re driving at 65 mph, your vehicle will travel 71 feet before you realize you need to start braking.
Reaction Distance
At 65 mph, that’s another 71 feet traveled.
Braking Distance
At 65 mph, it takes an additional 5.5 seconds or about 525 feet of actual brake application to stop your vehicle.
Stopping Distance
To determine the stopping distance, you calculate: Perception Distance (71 feet) + Reaction Distance (71 feet) + Braking Distance (525 feet) = Stopping Distance (667 feet)
Then to reduce the speed it takes 7.0 secs
