Answer:
The time taken by the car to get to the other side of an intersection is, t = 4.9 s
Explanation:
Given data,
The acceleration of the car, a = 2.5 m/s²
The initial velocity of the car, u = 0
The distance traveled, s = 30 m
Using the II equations of motion,
<em> S = ut + ½ at²</em>
Therefore,
t = √(2S/a) ( since u = 0)
Substituting the values
t = √(2 x 30 / 2.5)
= 4.9 s
Hence, the time taken by the car to get to the other side of an intersection is, t = 4.9 s
Answer:
diameter of transmission is 3.473 mm
Explanation:
given data
current = 300 A
total wire length = 1.0 m
voltage drop = 0.55 V
solution
as here Resistivity of copper is = 1.68 × ohm- m
so we get here resistance of wire that is
resistance = ..............1
R =
R = 1.774 × ohm
and now we get diameter of wire that is
R = .............2
d² = ...............3
put here value
d² =
d =
d = 3.473 × m
d = 3.473 mm
so diameter of transmission is 3.473 mm
Water changes from a liquid to a gas.
Explanation:
In locations U and X, water changes from a liquid to a gas.
What we have in this step is a phase change by which liquid water turns into vapor.
- Evaporation is a phase change from liquid to gaseous form.
- Water in the ocean and in plants are removed by evaporation and turned into vapor.
- In the air, at stage V, the water condenses
- The condensed water falls back as precipitation in step W which runs off
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Answer:
r = 2161.9 m
Explanation:
Aerodynamic lift(L) is perpendicular to the wing, which is tilted 40 degrees to the horizontal.
Since the plane is moving in a horizontal circle, the vertical component of the lift must cancel the weight W of the airplane, but the horizontal component is the centripetal force that keeps it in a circle.
L is perpendicular to wing at angle θ with respect to horizontal
Thus,
Vertical component of lift is:
L cosθ = W = mg
Thus, m = L cosθ / g - - - - (eq1)
Horizontal component of lift is:
L sinθ = centripetal force = mv² / r - - - - (eq2)
Combining equations 1 and 2,we have;
L sinθ = (L cosθ / g)(v² / r)
L cancels out on both sides to give;
tanθ = v²/ rg
r = v² / (g tanθ)
We are given;
velocity; v = 480 km/hr = 480 x 10/36 = 133.33 m/s
r = 133.33²/[(9.8) tan(40)] = 2161.9 m