Answer: The correct option is b.
Explanation:
The second law of the thermodynamics states that thermal energy can flow from the colder objects to hotter objects.
It is not possible to transfer heat from the colder body to hotter body without any work.
Energy will not flow spontaneously from the object at low temperature to an object at higher temperature.
Therefore, the correct option is b.
It is a parabola, or a curve. Hope this helps!
Answer:
<h2>Solving elastic collisions problem the hard way</h2><h3 />
Explanation:
perfect drawing
Answer:
Vf = 62.61 m/s
Explanation:
Since, the truck completely stops t highest point. Therefore, from conservation of energy principle:
Kinetic Energy Lost by Truck = Potential Energy Gained by Truck
(0.5)(m)(Vf² - Vi²) = mgh
(0.5)(Vf² - Vi²) = gh
where,
Vf = final velocity = 0 m/s (since, truck finally stops)
Vi = initial velocity = ?
g = acceleration due to gravity = - 9.8 m/s² (negative sign due to upward motion)
h = Height of Ramp = (Length)(Sin θ) = (400 m)(Sin 30°) = 200 m
Therefore,
(0.5)(0² m/s - Vf²) = (-9.8 m/s²)(200 m)
Vf² = (1960 m²/s²)/(0.5)
Vf = √(3920 m²/s²)
<u>Vf = 62.61 m/s</u>