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3 years ago

What is the best explanation for why, on average, children playing inside a

Physics

1 answer:

Anestetic [448]3 years ago

5 0

Answer:

In a house there is a lot less space so there is no where for the sound to travel, but if you are outside there is a lot more space so therefore, the sound can travel anywhere.

Explanation:

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How does fabric softener help prevent static electricity?

algol13

Answer:

Dryer sheets stop static cling by absorbing static electricity formed by different fabrics during your dryer cycle. The fabric softeners that coat dryer sheets are positively charged ions to balance the electrons and ions that cause static cling, leaving you with soft clothes without the static.

Explanation:

3 0

2 years ago

Total lung capacity of a typical adult is approximately 5.0L. Approximately 20% of the air is oxygen, as air is 20% oxygen. At s

Tresset [83]

Answer:

n=0.03928 moles

Moles of oxygen do the lungs contain at the end of an inflation are 0.03928 moles

Explanation:

The amount of oxygen which lung can have is 20% of 5 L which is the capacity of lungs

Volume of oxygen in lungs =V=5*20%= 1 L= $1*10^{-3} m^3$

Temperature=T= $37^oC=273+37=310K$

Pressure at sea level = P= 1 atm= $1.0125*10^5 Pa$

R is universal Gas Constant =8.314 J/mol.K

Formula:

$n=\frac{PV}{RT}\\n=\frac{(1.0125*10^5) *(1*10^{-3})}{(8.314)*310} \\n=0.03928 mol$

Moles of oxygen do the lungs contain at the end of an inflation are 0.03928 moles

8 0

4 years ago

20 kg rodsis on the edge of a 80 m high de What is the rodes gracional potencial energy?

quester [9]

Answer:

Gpe = 15680 Joules

Explanation:

Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.

Mathematically, gravitational potential energy is given by the formula;

G.P.E = mgh

Where;

G.P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Given the following data;

Mass = 20 kg

Height = 80 m

We know that acceleration due to gravity is equal to 9.8 m/s²

To find the gravitational potential energy;

Gpe = mgh

Gpe = 20 * 80 * 9.8

Gpe = 15680 Joules

7 0

3 years ago

The purpose of a motor is to:

WINSTONCH [101]

Answer:

a motor is used to covert electrical energy to mechanical energy

7 0

3 years ago

Una persona A tiene cierta cantidad de masa y una persona B tiene la mitad de masa de la persona A ¿como es el peso de B respect

musickatia [10]

Answer:

El peso de la persona B es la mitad del peso de la persona A.

Explanation:

El peso de la persona B puede calcularse con la siguiente ecuación:

$P_{B} = m_{B}g$ (1)

En donde:

$m_{B}$ : es la masa de la persona B

g: es la gravedad

Dado que la persona B tiene la mitad de la masa de la persona A, tenemos:

$m_{B} = \frac{m_{A}}{2}$ (2)

En donde:

$m_{A}$ : es la masa de la persona A

Al introducir la ecuación (2) en (1) nos queda:

$P_{B} = \frac{m_{A}}{2}g$ (3)

Sabemos que el peso de la persona A está dado por:

$P_{A} = m_{A}g$ (4)

Entonces, al introducir la ecuación (4) en (3) tenemos:

$P_{B} = \frac{P_{A}}{2}$

Por lo tanto, el peso de la persona B es la mitad del peso de la persona A.

Espero que te sea de utilidad!

5 0

3 years ago