The answer is pressure and gravity
Explanation:
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Helium is lighter than air from the lungs.
Explanation:
A balloon filled with the air from lungs will sink to the ground but a balloon filled with Helium floats because helium is lighter than air.
Air is a mixture of many gases.
The air from the lungs is predominantly made up of carbon dioxide and water vapor.
- Gram per mole of carbon dioxide is 44. Water vapor is 18.
- Compared to helium which is 4, we see that the gas is lighter.
- Since the gas is lighter, it will float in air.
- The main component of air around us is nitrogen gas with a gram per mole of 28.
- A balloon filled with more of air from the lungs weigh more than that will filled air around and even far more than helium gas.
- This will cause a helium filled balloon to float.
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Answer:
43.89 m/s
Explanation:
395000 meters/9000 seconds is 43.889 meters/second Speed = distance/time so we have 395000/9000 = 43.89 m/s.
Explanation:
1- El primer paso para calcular la fuerza del brazo en el punto medio de la excavadora para levantar la tierra, es averiguar dónde está el fulcro, que en este caso está en las manos.
2- El segundo paso es calcular el brazo de potencia, al que llamaremos Bp, y el brazo de resistencia, que estará representado por Br.
Si Bp es igual a la distancia de la potencia al fulcro, Bp = 60cm
y si Br es igual a la distancia desde la resistencia al fulcro, entonces
Br = 40 + 60 = 100cm
3- Ahora aplicamos la fórmula de la ley de la palanca. Nosotros
piden que se aplique la fuerza en manos de
en el medio, es decir, la potencia P. La fórmula sería:
Y en el tercer paso, aplicaremos la fórmula de la ley de la palanca, que es:
P = R x Br / Bp
P = 8 x 100/60
P = 13,33 Kgf
<u>Entonces la respuesta final es:</u>
P = 13,33 Kgf
