“We have very good evidence that there<span> was a </span>Big Bang, so the universe as ... found that before<span> our universe </span>there<span> was nothing, nothing at all, </span>not<span> even time itself. ... behind the more familiar forms of </span>matter<span> and energy that fill the universe today. ... </span>If<span> we assume inflation is eternal into the past </span>
Answer:
(A) 0.8 kgm/s
Explanation:
because of the even ground it would only slow down
Answer:
a) 0.014N
b) 0.069N
c) 22 seconds
Explanation:
We are given:
t = 49 seconds
let's take
a) At terminal speed, net force will be zero.
Therefore,
2. Since 5 coffee filters were dropped, we assume the gravity force and mass will increase by 5, so we have:
= 0.069N
3. At terminal velocity, drag force will be a function of V²
Therefore,
Terminal velocity will now be
We are told it takes 49 seconds for 1 filter to hit the ground, thus for 5 filters to hit the grround we have:
= 21.9 => 22 seconds
It will take approximately 22 seconds for a stack of 5 filters to hit the ground
Answer:
C.
Explanation:
If there are the same number of protons (+) as electrons (-) they will cancel out and make the atom neutral.