1) Upward motion
y1 = Vo*t - g(t^2) / 2
2) Downward motion
y2 = D - [Vo*t + g(t^2) / 2]
3) Collision => y1 = y2
y1 = Vo*t - g(t^2) / 2
y2 = D - [Vo*t + g(t^2) / 2]
Vo*t - g(t^2) / 2 = D - [Vo*t + g(t^2) / 2]
Vo*t - g(t^2) / 2 = D - Vo*t - g(t^2)/2
D = 2Vo*t => t = D / (2Vo)
Substitute the value of t in the equation of y1 (it is the same if you do it in the equation of y2)
y1 = Vo*t - g(t^2) / 2 = Vo [D/(2Vo) ] - g [D / (2Vo)]^2 / 2
y1 = D/2 - g(D^2) / 8(Vo ^2)
Answer: y1 = D/2 - g(D^2) / 8(Vo ^2)
Answer:
is a double displacement reaction
- is a redox reaction
- is a combination reaction
- is a decomposition reaction
Explanation:
It is of the form
Both oxidation and reduction occur in this reaction. Fe gets oxidized and H gets reduced.
It is an exothermic combination reaction. Calcium reacts with water to produce calcium hydroxide and heat is released in this process.
It is a decomposition reaction where nickel chloride decomposes to nickel and chlorine.
<span>The correct option is C. Energy cannot be created or destroyed. This statement is known as law of conservation of energy, and it implies that whenever a certain form of energy does change, the loss of this form of energy must have converted into an another type of energy. A typical example is an object falling to the ground: initially, the object has gravitational potential energy. As the object falls down, it loses potential energy (since its altitude from the grounf decreases), but it acquires kinetic energy (because its velocity increases). In this example, potential energy has converted into kinetic energy, but the total energy of the object has remained constant.</span>
Answer:
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C. Margaret Floy Washburn
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Answer:
A.
Explanation:
The SUV accelerates uniformly. In this case, speed () is directly proportional to time (). That is:
(1)
Where is the proportionality constant.
Then, we eliminate this constant by creating the following relationship:
(2)
If we know that , and , then the time interval for the SUV to accelerate from rest to a speed is:
Hence, correct answer is A.