Answer: Wire Quality
Explanation: Exposed wires and chafing show wear and tear of the drills electrical cord and how reliable it could be in the future.
If exposed wires are visible, wrap in electrical tape, replace the cord, or buy a new drill.
Life scientist which is C If im wrong it must be B
Answer:
t ≤ 0.31s
Explanation:
Given
Frequency = 0.1Hz
Dynamic Error:
σ = 1 - M(σ)
From the question
σ= 1 - M(σ) ≤ 2%
1 - M(σ) ≤ 0.02
The above corresponds to
M(σ) = 1/(1 + (wt))² ≥ 100% - 0.02
M(σ) = 1/(1 + (wt))² ≥ 1 - 0.02
M(σ) = 1/(1 + (wt))² ≥ 0.98
Since frequency = 0.1Hz
w = 2πf =
w = 0.628571428571428
w = 0.628rads
So, M(0.628) = 1/(1 + (0.628t)²) ≥ 0.98
Solving 1/(1 + (0.628t)²) ≥ 0.98 we get that
t ≤ 0.31s
Answer:
23.34 seconds
Explanation:
Flow rate = 1500
Arrival = 800 vehicle per hour
Cycle c = 60 seconds
Dissipation time = 10 seconds
Arrival time = 800/3600 = 0.2222
Rate of departure = 1500/3600 = 0.4167
Traffic density p = 0.2222/0.4167 = 0.5332
Real time = r
r + to + 10 = c
to = c-r-10 ----1
t0 = p*r/1-p ----2
Equate both 1 and 2
C-r-10 = p*r/1-p
60-r-10 = 0.5332r/1-0.5332
50-r = 0.5332r/0.4668
50-r = 1.1422r
50 = 1.1422r + r
50 = 2.1422r
r = 50/2.1422
r = 23.34 seconds