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tiny-mole [99]
3 years ago
10

What is the most important mineral​

Physics
1 answer:
My name is Ann [436]3 years ago
8 0

Answer:

Iron

Explanation:

Iron is a component of hemoglobin, which as you know is a substance found in red blood cells which carries oxygen from the lungs to other parts of the body.

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What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway? a plane accelerates from
ElenaW [278]
When is at the end of the runway the velocity of the plane is given by the equation vf^{2}=0+2*a*s    where s=1800 m is the runway length. Thus
vf^{2}=2*5*1800=18000 (m/s)^{2}      
vf =134.164 (m/s)  

At half runway the velocity of the plane is
v^{2}=2*5* \frac{1800}{2}=9000 ( \frac{m}{s} )^{2}
 
v= \sqrt{9000}=94.87 ( \frac{m}{s})

Therefore at midpoint of runway the percentage of takeoff velocity is
‰P= \frac{v}{vf}=  \frac{94.87}{134.164}=0.707
6 0
3 years ago
A fighter-bomber is making a bombing run flying horizontally at 500 knots (100 m/s). At an altitude of 100 m. a. How long will i
DanielleElmas [232]

Answer:

5\:\mathrm {s}

Explanation:

We can use kinematics equation \Delta y={v_i}t+\frac{1}{2}at^2 to solve this problem. Since v_i in the vertical direction is 0, we have:

\Delta y =\frac{1}{2}at^2 (freefall equation)

Plugging in values, we get:

100=\frac{1}{2}\cdot 9.81\cdot t^2,\\\\t^2=\frac{100}{\frac{1}{2}\cdot 9.81},\\\\t=\sqrt{20.387}\\\\t=4.515\approx \fbox{$5\:\mathrm{seconds}$}(one significant figure).

*The horizontal velocity is irrelevant in this question. It only affects the horizontal displacement of the object (where the object lands), not how long it takes for the object to hit the ground.

8 0
3 years ago
Assuming atmospheric pressure to be 1.01 x 10^5 Pa and the density of sea water to be 1025 kg/m^3, what is the absolute pressure
Rudik [331]
To solve for absolute pressure, you will need this formula:

P_{total}  = P_{atm} + (rgh)

Where: P_{total} = absolute pressure
             P_{total} = atmospheric pressure
             r (rho) = density
             g  = acceleration due to gravity constant 9.8  \frac{m}{ s^{2} }
             h = depth (in this case)

rgh is the formula for pressure of fluids

So with your given, we just need to insert it into the formula:

P_{total} = P_{atm} + (rgh)
P_{total} = 1.01 x 10^{5} x (1,025 \frac{kg}{m^3} x 9.8 \frac{m}{{s^2}} x 15 m
P_{total} = 1.01 x 10^{5} + 150,675
P_{total} = 1.01 x 10^{5} + 1.51 x 10^{5}

P_{total} = 2.52 x 10^{5} This is your absolute pressure.



3 0
3 years ago
Please help asap past due<br> no thanks or I will report you
solniwko [45]

Answer:

Non-renewable energy comes from sources that will run out or will not be replenished for thousands or even millions of years. Most sources of non-renewable energy are fossil fuels. Fossil fuels were created as the remains of marine creatures decayed millions of years ago, under huge amounts of pressure and heat. Most fossil fuels are burned to create energy and electricity. Coal, above, is a type of rock that is a fossil fuel.

Explanation:

Cited: https://www.nationalgeographic.org/encyclopedia/non-renewable-energy/

6 0
3 years ago
A 20 kg block rests on a rough horizontal table. A rope is attatched to the block and is pulled with a force of 80 N to the left
Pani-rosa [81]

Given :

Mass of block , M = 20 kg .

Force applied , F = 80 N .

Acceleration of block , a=2.5\ m/s^2 .

To Find :

The coefficient is Kinetic force friction between the block and the table .

Solution :

We know , Force equation on block is given by :

F_{net }=F-\mu_k mg \\\\ma = F-\mu_k mg \\\\20\times 2.5 = 80 -\mu_k \times 20 \times 10\\\\\mu_k\times 200=30\\\\\mu_k=\dfrac{30}{200}\\\\\ mu_k=0.15

Therefore , coefficient is Kinetic force friction between the block and the table is 0.15 .

Hence , this is the required solution .

5 0
4 years ago
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