Answer:
Resumes and References
Explanation:
It would always be good to have em, what if you lost some or need some information to back you up. Just how I look at it.
Answer:
B. The crumple method, because the car absorbs all the forces that would otherwise act on the person.
Explanation:
The impact forces transmission to passengers needs to be minimized in order to achieve the highest safety level, hence in the case of a collision, car will crumple and absorb most part of that force and will not cause harmful sudden deceleration.
Answer:
F = 51.3°
Explanation:
The component of weight parallel to the inclined plane must be responsible for the rolling back motion of the car. Hence, the force required to be applied by the child must also be equal to that component of weight:
where,
W = Weight of Wagon = 150 N
θ = Angle of Inclinition = 20°
Therefore,
<u>F = 51.3°</u>
Note that
The specific heat of water is 4.184 J/(g -C)
Let x = the final equilibrium temperature.
Heat loss by the copper is
(155 g)*(0.385 J/(g -C))*(168 - x C) = 59.675(168 -x) J
Heat gain by the water is
(250 g)*(4.184 J/(g-C))*(x - 20.9 C) = 1046(x - 20.9) J
Because there is no heat loss to the surroundings, therefore
59.675(168 - x) = 1046(x - 20.9)
168 - x = 17.5283(x - 20.9)
18.5283x = 534.3415
x = 28.84 °C
Answer: 28.8 °°C nearest tenth)