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2 years ago

How much force does the astronaut exert on his chair while accelerating straight up at 10.0 m/s2m/s2

Physics

1 answer:

Mkey [24]2 years ago

3 0

Answer:

M a = Fc -M g

Use up as positive - a is the acceleration upwards

Fc = M (a + g) force exerted by chair

Fc = 19.8 M m/s^2 where M is the mass of the astronaut

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A person's body is producing energy internally due to metabolic processes. If the body loses more energy than metabolic processe

SVETLANKA909090 [29]

Answer:

$T_s = 6.8 degree C$

Explanation:

As per thermal radiation we know that rate is heat radiation is given as

$\frac{dQ}{dt} = \sigma eA (T^4 - T_s^4)$

here we know that

T = 34 degree C = 307 K

$A = 1.38 m^2$

e = 0.557

$\sigma = 5.67 \times 10^{-8} W/m^2K^4$

$\frac{dQ}{dt} = 120 J/s$

now we have

$120 = (5.67 \times 10^{-8})(0.557)(1.38)(307^4 - T_s^4)$

$120 = (4.36 \times 10^{-8})(307^4 - T_s^4)$

$T_s = 279.8 K$

$T_s = 6.8 degree C$

5 0

3 years ago

I need help with this physics question.

Bumek [7]

The acceleration will increase by 61.3%.

Explanation:

The centripetal acceleration $a_c$ is given by

$a_c = \dfrac{v^2}{r}$

If the velocity of the object increases by 27.0%, then its new velocity v' becomes

$v' = 1.270v$

The new centripetal acceleration $a'_c$ becomes

$a'_c = \dfrac{(1.270v)^2}{r} = 1.613 \left(\dfrac{v^2}{r} \right)$

$\:\:\:\:\:\:\:\:\:= 1.613a_c$

8 0

3 years ago

1. Nombrar mediante ITEMS las características que tiene el musculo de pescado y como se diferencian del musculo animal terrestre

garri49 [273]

Answer:

Similitudes y diferencias entre los músculos de los peces y los de los animales terrestres.

Explicación:

Los músculos de los peces se diferencian del músculo de los animales terrestres porque los peces tienen músculos rojos, rosados y blancos. También tienen tejido muscular de pescado que se compone de músculo estriado al igual que el músculo de los animales terrestres. La mayor parte del tejido muscular de los peces es de color blanco, pero muchos peces también tienen una cierta cantidad de tejido oscuro de color marrón o rojizo. El músculo oscuro se encuentra justo debajo de la piel a lo largo del costado del cuerpo.

8 0

3 years ago

An electron with energy 13.2 eV collides with an element, and the electron emerges with energy 4.5 eV. What wavelength of light

Alecsey [184]

Answer: $140\ nm$

Explanation:

Given

Initial kinetic energy is $K_i=13.2\ eV$

Final kinetic energy is $K_f=4.5\ eV$

Change in kinetic energy is $\Delta K=K_i-K_f$

$\Rightarrow \Delta K=13.2-4.5\\\Rightarrow \Delta K=8.7\ eV$

Energy is given by

$E=\dfrac{hc}{\lambda}$

Equate it to change in kinetic energy

$\Rightarrow 8.7=\dfrac{hc}{\lambda}\\\\\Rightarrow \lambda =\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{8.7\times 1.6\times 10^{-19}}\\\\\Rightarrow \lambda =1.4\times 10^{-7}\ m\\\Rightarrow \lambda=140\ nm$

Therefore, the wavelength associated with it is $140\ nm$ .

3 0

3 years ago

to determine the temperature of a gas in kelvins add ____ to the ____ temperature a) 100 degrees, celsius b) 273 degrees, fahren

Lyrx [107]

I believe that the answer is C. I did this last week

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3 years ago