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Science & Mathematics

About 56 billion land animals are killed for food every year... but how many are raised every year?
How many exist at any given moment? Surely a lot more since some animals aren't slaughtered until after 3 or 5 years of life... 
Simplify this maths problem?
I tried it and got 81/y^3 (0.04y^8) What have I done wrong? 
How isn’t an accidental overdose considered suicide?
Best answer: Because whoever aren't able to determine if it was an accident.
Only if it was a new medication to the person,. The first time taking the medicine, then they could say it was an accident.
Otherwise, this type of thing usually requires a thought out plan. 
How long before Greenland's glacier melt raises sea level 25 feet?

The earth is flat?
If the earth is a ball and spins why doesn't the ocean spill into the universe ? For example when you see the earth from space parts of the ocean are on the side and upside down and that n proves it's flat or water will spill . . I believe the earth is flat and that it ends somewhere like a wall and that space images are fake..maybe they are not telling us what's at the end for a reason... maybe I will set n out to find out in secret before the government comes after me for exposing the earths truth 
If the time is 4:30, what time was it 19 hours ago?

The value of 'g' at the centre of the earth? Explain.?

Can it be possible to make a cannon like from Jules Vernes novel?
Best answer: Yes, but surviving the shot would be the hard part. 
I am getting a salary of 15,700 per annum could any body explain how much this is per month? Thank you?

So, what do we know about the conditions of a black hole?
Hot, cold? Safe to pass through? 
√x^5/cubed root x^4= x ^ a/b what is the value of the fraction a over b?

Does anyone know how to develop Precognition? Or is that something that just happens to some people?
I’m curious because I would love to have this power to. I have a weak telekinesis and telepathy, sometimes I would love to see the future but I don’t know how to develop it. I honestly don’t know how I got telepathy but telekinesis just happened to me recently so I meditate a lot now which makes it a bit stronger mine is weak at the moment. I know that I have telepathy because I have been making the thought of moving back into his place by that I mean my brother we are not close really and he’s lived here for a few years he just happens to bring up moving back when I did this. We are not that close we don’t fight like we used to either I just sometimes would like a break. I’ve done so much with my telekinesis I practice it with my crystals I’ve moved them a few times and I drowned a ball in my pool I can go on and on. 
Why won’t Polar region’s 24 hrs continuous sunlight in summer cause them hot climate anymore?

Should they turn the cameras back on Voyager 1 so we can see it's environment ?
Best answer: In addition to the other correct answers, that there is nothing of interest within range of the cameras, it is probable that the cameras are not operational. As the amount of power available has steadily declined as the PU238 powering the RTGs has decayed, various systems have to be turned off to stay within the ever decreasing power available. Years ago the camera heaters were shut down, so it is very likely that the cameras were damaged by the intense cold. 
I need physics help: The magnitude of the sum of two vectors can be_____. (select two answers)?
Best answer: The magnitude of the sum of two vectors can be
a. less than the sum of the magnitudes of each vector.....TRUE
....Example. <1,2> has magnitude √(1²+2²) = √5
....and <1,2> has magnitude √((1)²+(2)²) = √5
....The sum of <1,2> + <1,2> has magnitude √(0²+0²) = 0

b. greater than the sum of the magnitudes of each vector......FALSE
....Example. <1,2> has magnitude √(1²+2²) = √5 ≈ 2.2361
....and <2,0> has magnitude √((2)²+(0)²) = 2
....The sum of <1,2> + <2,0> has magnitude √(3²+2²) = √13 ≈ 3.605

c. equal to the sum of the magnitudes of each vector .........TRUE
....Example. <0,0> has magnitude 0
....and <0,0> has magnitude 0
....The sum of <0,0> + <0,0> has magnitude 0
 
Telepathy test: which word did I write?
Best answer: You can't fool my astute telepathic powers. You wrote down "Greenland" and circled it. 
Can someone help me in this problem?
Best answer: Velocity entering the sandbag
v = 340(0.90)
v = 306 m/s
If we assume the bullet experiences constant acceleration while slowing down in the sandbag. (a rather large assumption)
v² = u² + 2as
0² = 306² + 2a(0.12)
a = 390150 m/s²
s = ½at²
t = √(2s/a)
t = √(2(0.12)/390150)
t = 7.84 x 10^4 s 
What happens when the negative and positive charges collide during lighting?
The negative charges from the clouds and the positive charges from the ground meet, and then they flow in both directions and hit each other, right? So what happens then? They hit each other and just disappear? Why don't they hit each other while they are in the cloud? Just because there is an equal number of positive and negative charges in the cloud they don't hit each other? Why? 
Simplify this math equation?

How much will it cost for 0.42 pounds if each pound costs 6.95 dollars per pound?
It's a math problem