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3 years ago

Easy science question please help. Will give brainliest

Physics

2 answers:

dybincka [34]3 years ago

6 0

Answer:

ITS A

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aivan3 [116]3 years ago

6 0

Answer:

Explanation:

Because the force of gas is pushing the rocket upward, while the force of gravity is trying to keep the rocket on the ground. (I'm sorry if this is wrong, I haven't been learning about Newton very much recently XD. But based on general knowledge and Google, I'm confident this is correct.)

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The weight of a person is 500N and his foot imprint area is 0.5m^2.Calculate the total pressure exerted by person when he stands

Ghella [55]

Answer:

Pressure on both feet will be $500N/m^2$

Explanation:

Weight of the person F = 500 N

Area of foot print $A=0.5m^2$

Area of both the foot $A=2\times 0.5=1m^2$

We have to find pressure on both the feet

Pressure is equal to ratio of force and area

So pressure $P=\frac{F}{A}$

$P=\frac{500}{1}=500N/m^2$

So the pressure on both feet will be $500N/m^2$ when person stands on both feet.

7 0

3 years ago

On a Saturday afternoon, you decide to pay a neighborhood kid to mow your lawn. The kid usesa manual push lawn mower with a mass

Mars2501 [29]

Answer with Explanation:

We are given that

A.Mass,m=12 kg

$\theta=53^{\circ}$

$\mu_k=0.16$

Speed,v=1.5m/s

Net force in x direction must be zero

$F_{net}=0$

$Fsin\theta-f=0$

$Fsin\theta=f$

Net force in y direction

$N-mg-Fcos\theta=0$

$N=mg+Fcos\theta$

$f=\mu_kN=\mu_k(mg+Fcos\theta)$

$Fsin\theta=\mu_k(mg+Fcos\theta)$

$Fsin\theta=\mu_kmg+\mu_kFcos\theta$

$Fsin\theta-\mu_kFcos\theta=\mu_kmg$

$F(sin\theta-\mu_kcos\theta)=\mu_kmg$

$F=\frac{\mu_kmg}{sin\theta-\mu_kcos\theta}$

Power,P=Fv

$P=\frac{\mu_kmg}{sin\theta-\mu_kcos\theta}v$

Where $g=9.8m/s^2$

B.Substitute the values

$P=\frac{0.16\times 12\times 9.8}{sin53-0.16cos53}\times 1.5$

$P=40.17W$

6 0

4 years ago

¿A qué se llama Campo en Psicología?

rjkz [21]

¡Hola! Un campo de la psicología son las ramas principales de la psicología. (Por ejemplo, psicología del comportamiento, psicología cognitiva, psicología del desarrollo, psicología de la personalidad). ¡Espero que esto le ayude! Buena suerte y que tengas un gran día. Por cierto, AMO la psicología, ¡así que siéntete libre de hacerme más preguntas al respecto! Además, intente utilizar la versión en español de Brainly para obtener mejores respuestas en su idioma: https://brainly.lat/

❤️✨

4 0

3 years ago

Read 2 more answers

An indicator of average kinetic energy is _____. pressure volume diffusion temperature

slega [8]

An indicator of average kinetic energy is temperature. Temperature is directly proportional to Kinetic energy of the molecules of an element.

3 0

3 years ago

Read 2 more answers

Each year, an average person in the United States is exposed to a radiation level of _____.

Anna11 [10]

Answer:

The correct answer is 0,2 rems

Explanation:

People are exposed to natural sources of radiation all the time. According to recent estimates, the average person in the United States receives an effective dose of approximately 3 mSv per year of natural radiation, which is equivalent to 0.3 rems. This amount includes cosmic radiation from outer space and is average because it varies depending on the region people are in.

The amount of radiation for a chest x-ray of an adult (0.01 rems) is approximately equal to 10 days of natural radiation to which we are all exposed every day.

Have a nice day!

3 0

3 years ago