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zvonat [6]
3 years ago
11

PLS HELPP (for physics) (dont answer if u dont know pls its a rlly important test)

Physics
1 answer:
GaryK [48]3 years ago
6 0

Answer: number 2 is d correct answer for this MCQs

Explanation:

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A train departs from its station at a constant acceleration of 5m/s2. What is the speed of the train at the end of 20 seconds
Shalnov [3]

a = v/t

v = a.t

v = 5 * 20 = 100m/s

8 0
4 years ago
Científico que formuló 3 leyes de astronomía
s2008m [1.1K]

Answer:

El astrónomo alemán Johannes Kepler

Explanation:

Primera Ley:

Los planetas giran alrededor del Sol siguiendo una trayectoria elíptica. El Sol se sitúa en uno de los focos de la elipse.

La excentricidad e de una elipse es una medida de lo alejado que se encuentran los focos del centro.

Pues bien, la mayoría de las órbitas planetarias tienen un valor muy pequeño de excentricidad, es decir e ≈ 0. Esto significa que, a nivel práctico, pueden considerarse círculos descentrados.

Segunda Ley:

La recta que une el planeta con el Sol barre áreas iguales en tiempos iguales.Para que esto se cumpla, la velocidad del planeta debe aumentar a medida que se acerque al Sol. Esto sugiere la presencia de una fuerza que permite al Sol atraer los planetas, tal y como descubrió Newton años más tarde.

Tercera ley de Kepler:

La tercera ley, también conocida como armónica o de los periodos, relaciona los periodos de los planetas, es decir, lo que tardan en completar una vuelta alrededor del Sol, con sus radios medios.

Para un planeta dado, el cuadrado de su periodo orbital es proporcional al cubo de su distancia media al Sol.

4 0
3 years ago
HELP PLEASE- BRAINLY TO FIRST REAL/ CORRECT AWNSER, NO LINKS NOT BOTS
tankabanditka [31]

Answer:

D. in space

because light is an electromagnetic wave that moves faster without a medium.. so, space is the correct answer

4 0
3 years ago
Read 2 more answers
How do day and night at Uranus equator change as Uranus revolves around the sun
stich3 [128]
They don't because there to big to fit inside me
8 0
3 years ago
Ce unitate de masura are indicele de REFRACTIE?
ivolga24 [154]

Answer:se obesrva ca indicele de refractie NU are unitate de masura, este adimensional. Se exprima print-un raport, de exemplu 4/3, 1,5 etc.

Explanation:

3 0
3 years ago
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