Step-by-step explanation:
Average = 30 mil/h
Period = 10s
Av = 30 ÷ 360 / 3600 ÷ 360
Av = 1/12 mil / 10 sec
Answer:
21 miles
Step-by-step explanation:
s=vt
Vt = 3.5mi/h + 7mi/h
= 10.5mi/h
Tt = 0.5 hr + 1.5hr
= 2 hr
St = 10.5(2hr)
= 21 miles
As angle 6y° and angle( 13y - 10 )° are interior angles on the same side of transversal their sum will be equal to 180° .
Then :-
Which means :-
= 13y - 10
= 13 × 10 - 10
= 130 - 10
= 120°
Then angle 6y :-
= 6 × 10
= 60°
As angle 60° and angle 9x + 12° are a linear their sum will also add up to form 180° .
Which can be written as :-
Then :-
= Angle 9x + 12
= 9 × 12 + 12
= 108 + 12
= 120°
Therefore , the value of y = 10 and the value of x = 12 .
Answer:
k = Y*A/L
Step-by-step explanation:
We can apply the Law of Hooke in order to explain the problem.
If we define k = F / ΔL and the Y = S / δ
Where S is the uniaxial stress: S = F / A <em>(i)</em>
and δ is the strain: δ = ΔL / L <em>(ii) </em>
ΔL is the change in length
we can combine the equations i and ii as follows
Y = (F / A) / (ΔL / L) = (F * L) / (A * ΔL) <em>(iii)</em>
if k = F / ΔL the equation <em>iii</em> results
Y = k * (L / A) ⇒ k = Y*(A / L)
9 - 2c + c = -13
9 - 3c = -13
-3c = -22
c = 7 1/3