Answer:
Explanation:
Conservation of angular momentum
The MGR originally has momentum
L = 100(3.0) = 300 kg•m²/s²
The child can be thought of as a point mass with I = mr²
When she jumps onto the rim of the MGR
300 = (100 + 22(2.0²)ω
ω = 300 / 188 = 1.5957... 1.6 rad/s
As she moves toward the center of the MGR, her moment of inertia goes to zero as her radius goes to zero.
The angular velocity when she reaches the center will again be 3.0 rad/s
I would say millions of people think the world is flat. I would guess the vast majority of indigenous peoples in say the Amazon, or parts of Africa, or many people in the Himalayas or rural India likely believe the world is flat. This isn't due to stupidity but rather a lack of education and the fact that whether the world is flat or round has no bearing on their lives. The Internet and globalization is rapidly changing this, but there are probably many more flat earthers than we often assume.
Now how many in the developed world believe the earth is flat? Hopefully a vanishingly small percentage.
Answer:
10 km/h
Explanation:
Before calculating the average speed, we need to convert the time taken for the trip from minutes to hours. Since 1 hour cointains 60 minutes, we have:
Karen's average speed is given by:
where
d = 5 km is the distance covered
t = 0.5 h is the time taken for the trip
Substituting into the equation, we find
Answer:
This is due to the stronger bond that forms between carbon and oxygen, which is greater than the bond between hydrogen and oxygen.
Explanation:
Well, if F = ma, then to find the mass the equation is m = Fa
So then m(1) = Fa(1)
m(2) = F(3)a(2)
Fa(1):F(3)a(2) should be the ratio, though the question doesn’t clarify how simplified this answer needs to be. So it may be incorrect.