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4 years ago

Where did the iron in your blood come from?

2 answers:

8 0

Answer: Every atom of oxygen in our lungs, of carbon in our muscles, of calcium in our bones, of iron in our blood - was created inside a star before Earth was born. Hydrogen and helium, the lightest elements were produced in the Big Bang.

-babyfacesavage

Vadim26 [7]4 years ago

4 0

Answer:

Every atom of oxygen in our lungs, of carbon in our muscles, of calcium in our bones, of iron in our blood - was created inside a star before Earth was born. Hydrogen and helium, the lightest elements were produced in the Big Bang.

Explanation:

MARK ME AS BRAINLIEST PLS :)

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A car enters a freeway with initial velocity of 15.0 m/s and with con stant rate of acceleration, reaches a velocity of 22.5 m/s

LiRa [457]

Answer:

a) The acceleration is 2.14 m/s^{2}

b) The distance traveled by the car is 65.61 m

c) The average velocity is 18.75 m/s

Explanation:

Using the equations that describe an uniformly accelerated motion:

a) $a=\frac{v_f - v_o}{t} =\frac{22.5m/s - 15.0 m/s}{3.50s}$

b) $d= d_0 + v_0 t + \frac{1}{2} a t^{2} = 0 +15.0 x 3.5 + \frac{2.14x3.50^{2} }{2} = 65.61 m$

c) $v_m =\frac{d}{t}=\frac{65.61}{3.5} =18.75 m/s$

8 0

4 years ago

John and Caroline go out for a walk one day. This graph represents the distance they traveled over time.

valentinak56 [21]

Answer:

From 0.75 to 1.25 hours

Explanation:

Given

See attachment for graph

Required

Point where they didn't move

This means that we identify the point where the distance didn't change.

Given that the distance is plotted on the y-axis, we simply check for the end points of any horizontal line on the graph

The horizontal line on the graph represents 30km and the time interval is: 0.75 to 1.25 hours.

Hence, (c) is correct

4 0

3 years ago

Which of the following elements is in the same period as phosphorus?

Arte-miy333 [17]

The answer is B. magnesium I am pretty sure

5 0

3 years ago

1. how to find out the elecronic structure of i. lithium ii. potassium iii. sodium

Setler [38]

Answer:

See explanation

Explanation:

To find out the electronic structure of each element, you must know the number of electrons it contains.

If you find that out(the number of electrons in the neutral atom of an element is the same as its atomic number). Then you arrange those electrons in such a way that the first shell has only two electrons and subsequent shells have eight electrons.

Look up the groups to which the elements belong in the periodic table All the elements are in group 1 so the last shell must have only one electron.

7 0

3 years ago

I REALLY NEED HELP ON THIS PLEASE HELP ME

Lapatulllka [165]

Answer:

I have no clue lol

Explanation:

8 0

3 years ago

Read 2 more answers