Answer:
h = 61.16[cm]
Explanation:
In order to solve this problem we must use the principle of energy conservation. Which tells us that energy is conserved or equal in two points in space for an instant in time.
In this way we will have the points A & B, the point A for the moment before shooting and the moment B when the Dart is in the highest position.
In this way the energy is:
Now we must identify the energies in the moments A & B. in the instant A we have the spring compressed, in such a way that only elastic energy is stored.
where:
k = spring constant = 20 [N/m]
x = distance = 0.3 [m]
Now, at the moment when the dart is in the highest position (B), it means that it does not go up anymore, that is, its movement is zero, and therefore its kinetic energy is zero, in this way the energy at the highest point corresponds to potential energy.
where:
m = mass = 0.15[kg]
g = gravity acceleration = 9.81 [m/s²]
h = elevation [m]
Now replacing:
![\frac{1}{2} *20*(0.3)^{2}=0.15*9.81*h\\0.9=1.4715*h\\h=0.61[m]\\or\\h = 61.16[cm]](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%20%2A20%2A%280.3%29%5E%7B2%7D%3D0.15%2A9.81%2Ah%5C%5C0.9%3D1.4715%2Ah%5C%5Ch%3D0.61%5Bm%5D%5C%5Cor%5C%5Ch%20%3D%2061.16%5Bcm%5D)
0.19
Explanation:you will divide 3.5 and 18
Answer: is option C: <em>Prolonged periods of cooling and warming</em>.
Explanation:
In the history of Earth, climate varies time to time. At times, the Earth's atmosphere was much hotter and humid as compare to the present time, but similarly it has been noticed that climate also has been much colder than he present time, whereas the number of glaciers covers much of the Earth's surface. There are two kinds of periods in which we further classified Earth's climate namely, Glacial period, and Inter-glacial periods. It has been noticed that the average global temperature of Earth during glacial periods was around 5.5°C or 10°F, which is less than Earth's present climate. On the other hand, during inter-glacial periods Earth's temperature was about 1.1°C or 2.0°F, which is again higher as compared to current temperature. Over the past 900,000 years, Earth's temperature varied less than 5°C. Scientist believe by looking at the Earth's climate history, that glaciers will proceed again in formation, but it will take thousands of years.
I believe the answer is C. protoplanetary disc. Let me know if this helps
Answer:
c20800
Explanation:
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