Consider that I'm an italian student so I may unproperly use some terms.
Being Ug (Potential energy on earth) = m·g·h
Where "m" in this case is the mass of the ball, "g" the average value of gravitation constant on Earth's surface and "h" the height reached by the ball.
The solution to the first question would be : Ug = mgh = 40[kg] · 10 [m/s²] · 5[m] = 2000 [Joule]
In order to find the value of its K (kinetic energy) and without considering air resistance, you can use the concept of mechanical conservation of energy that confirms : U(start) + K(start) = U(final) + K(final).
So since you want to find its K(final) you can isolate it in the law and it gives you:
K(final) = U(start) + K(start) - U(final)
Consider that in halfway fall its Ug(final) value is mgh = 40[kg] · 10[m/s²] · 2.5[m] = 1000[Joule]
Now you just need to change these elements into their values(consider that K(start) is 0:
K(final) = 2000[Joule] + 0[Joule] - 1000[Joule] = 1000[J]
Hope I explained it well.
Answer:
<h3>The answer is 0.54 m</h3>
Explanation:
The wavelength of a wave can be found by using the formula
where
c is the velocity
f is the frequency
So we have
We have the final answer as
<h3>0.54 m</h3>
Hope this helps you
I don't understand the question
Explanation:
Please give it clearly
Answer:
Explanation:
from snells law
sin(i)/sin(r) = refractive index
r = 90°
sin(i) = sin90°x 1.6
sin(i) = 1 x 1.6
angle of incidence = arcsin(1.6)
since sin90° = 1
hence,
angle of incidence = 36.86°
A- sulfur oxide
B- carbon monoxide