Carson’s <span>“Silent Spring” influenced the
environmental movement </span>as it presents a view of nature compromised by synthetic pesticides,
especially DDT. The pesticides not only kill bugs but also threaten bird and
fish populations, and eventually sicken children. Much of the data and case
studies that Carson drew from weren’t new but she was the first to consolidate
them all for the general public and to draw blunt conclusions. This book was so
revolutionary that by the end of the twentieth century, it took its place on
lists of the best books of the century or even of all time.
Answer: A hot air balloon rising and falling in the atmosphere, a radiator that emits warm air and draws in cool air, and rice moving in a pot of water that is being heated. :)
It’s Mechanical Advantage. It’s used to analyze the forces in simple machines like levers or pulleys.
Answer:
b) True. the force of air drag on him is equal to his weight.
Explanation:
Let us propose the solution of the problem in order to analyze the given statements.
The problem must be solved with Newton's second law.
When he jumps off the plane
fr - w = ma
Where the friction force has some form of type.
fr = G v + H v²
Let's replace
(G v + H v²) - mg = m dv / dt
We can see that the friction force increases as the speed increases
At the equilibrium point
fr - w = 0
fr = mg
(G v + H v2) = mg
For low speeds the quadratic depended is not important, so we can reduce the equation to
G v = mg
v = mg / G
This is the terminal speed.
Now let's analyze the claims
a) False is g between the friction force constant
b) True.
c) False. It is equal to the weight
d) False. In the terminal speed the acceleration is zero
e) False. The friction force is equal to the weight
Explanation:
no hablo español pero tuve que traducir mi respuesta por ti.................................una fuerza eléctrica es una fuerza entre dos cargas