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3 years ago

Air is a solution of 78% nitrogen, 21% oxygen and 1% other gases. Which part of this solution is the solvent?

Physics

2 answers:

blondinia [14]3 years ago

8 0

The answer to your question is 78%

Tom [10]3 years ago

6 0

The answer is 78%. i got it right

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Many arlines restrict maximum mass of a case to 23 kg why

Alexxandr [17]

Answer:

weight

Explanation:

the weight of an object on an airline is one of the most important thing a pilot has to consider when prepping a flight and that is because if there is too much weight then the plane simply can't fly. imagine if everyone wanted to bring a 50 kg box. there are at least 200 people. that alone is 10,000 lg of weight than you have to factor in all the people, wires on the plane, and certain appliances that some planes have.

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3 years ago

If you travel from Tucson to Argentina, you will see some different constellations in the night sky. true or false

Nataly [62]

Answer:

its true!!

Explanation: have a nice day !!

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3 years ago

Calculate the rate of acceleration of a 2,000.-kilogram truck if a force of 4,200 N is used to make it start moving forward?

Llana [10]

Answer:

Acceleration, $a=2.1\ m/s^2$

Explanation:

Given that,

Mass of a truck, m = 2000 kg

Force used to move the truck, F = 4200 N

We need to find the acceleration of the truck. The force acting on the truck is given by the expression as follows :

F = ma

a is the acceleration of the truck

$a=\dfrac{F}{m}\\\\a=\dfrac{4200}{2000}\\\\a=2.1\ m/s^2$

So, the acceleration of the truck is $2.1\ m/s^2$ .

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3 years ago

A soccer ball with a mass of 0.434 kg approaches a player horizontally with a speed of 13.0 m/s. The player kicks the ball with

zaharov [31]

Answer:

a) 15.49

b) Opposite to the ball's initial velocity

c) 258.16N

Explanation:

$\Delta p=m \Delta v\\\\\Delta p= (0.434)(13.0-(-22.7)) \\\\\Delta p=(0.434)(35.7)\approx 15.49 kg \cdot m/s$

Since the player is kicking the ball in the opposite direction to which it came, the impulse is being directed opposite to the ball's initial velocity.

$\Delta p= F \Delta t \\\\\\F=\dfrac{\Delta p}{\Delta t} \\\\\\F=\dfrac{15.49 kg \cdot m/s}{0.06 s}\approx 258.16N$

Hope this helps!

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4 years ago

A cannon ball fired horizontally from a cliff has a velocity directed at 60 degrees above horizontal when it hits the ground 3.0

Kamila [148]

Since the ball is fired horizontally, the initial y velocity is zero and the time to hit the ground is the same as if the ball was simply dropped from the cliff. So you can solve the y position function:
$-\frac{1}{2}g t^{2} + h_{o}=0$
giving a height of 44.1m.
The given final velocity vector tells us that the initial x-directed velocity was about 17m/s.

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3 years ago

Read 2 more answers