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Citrus2011 [14]
3 years ago
12

Would it be faster for you to travel from planet to planet within a solar system, from star to star within a galaxy, or from gal

axy to galaxy within the universe? Explain.
Physics
1 answer:
vagabundo [1.1K]3 years ago
8 0
It would be faster for you to travel from planet to planet within a solar system because they are closer than a star to a different star, and are closer than a galaxy to another galaxy within the universe.

If you chose the same speed unit for all the same options such as the speed of light or sound:

then indeed planet to planet would be the closest.

It depends on how far away the planet is.

Light from the Sun takes eight minutes to get to Earth
But takes 5.3 hours to get to Pluto.

So Earth to say Neptune, would take about 4 hours at the speed of light.

Final Answer: Planet to Planet within a Solar System
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Un adolescente que va en monopatín rueda hacia abajo sobre un plano inclinado de 18.0 m de largo. El chico parte con una rapidez
qaws [65]

Answer: 31.62°

Explanation:

Tenemos como datos:

Distancia = 18.0m

Velocidad inicial = 2.0 m/s

Tiempo total = 3.3s

Sabemos que para un plano inclinado (ignorando el rozamiento) la aceleración se escribe como:

a(t) = g*sen(θ)

donde θ es el ángulo del plano inclinado, y g = 9.8m/s^2

Sabemos que para la velocidad tenemos que integrar la aceleración sobre el tiempo, entonces:

v(t) = g*sen(θ)*t + v0

Donde v0 es la velocidad inicial: v0 = 2.0m/s

v(t) = 9.8m/s^2*sen(θ)*t + 2.0m/s

Y para la posición, podemos integrar de vuelta sobre el tiempo:

p(t) = 0.5*9.8m/s^2*sen(θ)*t^2 + 2.0m/s*t + p0

Donde p0 es la posición inicial, podemos considerar que es cero para este problema.

p(t) = 4.9m/s^2*sen(θ)*t^2 + 2.0m/s*t

Y usando los datos iniciales, sabemos que en 3.3 segundos se recorren 18 metros, entonces:

p(3.3s) = 18m = 4.9m/s^2*sen(θ)*(3.3s)^2 + 2.0m/s*3.3s

              18m = 51.744m*sen(θ) + 6.6m

              sen(θ) = (18m - 6.6m)/ 51.744m

                   θ = cosec( (18m - 6.6m)/ 51.744m ) = 31.62°

4 0
3 years ago
A robot arm moves so that P travels in a circle about point B, which is not moving. Knowing that P starts from rest, and its spe
algol13

Answer

Acceleration=>10.20mm/s

Explanation

Below in image

4 0
3 years ago
Three 10-cm-long rods form an equilateral triangle. Two of the rods are charged to + 19 nC, the third to - 19 nC.What is the ele
Sveta_85 [38]
<span>We calculate the electric field as follows:
r = </span>√<span>(3)/6 x 19 cm = .05484 m 
The angle for the triangle would be 30 on each side.
tan(30) = r/(L/2) 

E' = kQ/{r*sqrt[(L/2)^2 + r^2]} = (8.99e9 x 15e-9) / {.05484 * sqrt[(.19/2)^2 + .003]}
</span>E' <span>= 22413 N/C
The value above is the electric field strength for a single rod at the center. 

|E'| = 22413 N/C 
E = 2|E'|sin(30) + |E'| = 49000 N/C</span>
5 0
3 years ago
A current of 6.93 A 6.93 A in a long, straight wire produces a magnetic field of 4.15 μT 4.15 μT at a certain distance from the
natka813 [3]

Answer:

0.334 m

Explanation:

The magnetic field due to current in a straight thin wire, B, is given by

B = \dfrac{\mu_0 I}{2\pi R}

where \mu_0 is the permeability of free spave with value 4\pi\times10^{-7} and R is the distance from the wire.

R = \dfrac{\mu_0 I}{2\pi B}

Substituting the values from the question,

R = \dfrac{4\pi\times10^{-7}\times 6.93}{2\pi\times 4.15\times 10^{-6}}

R = \dfrac{2\times10^{-1}\times6.93}{4.15} = 0.334 \text{ m}

7 0
4 years ago
Read 2 more answers
6.A Soldering Iron has a power of 25W. It uses the 230V mains supply. What is the current when it is switched on?
solmaris [256]
Power (P) in "watts" in a circuit is the product in multiplying the current (I) in "amperes" and voltage (V) in "volts". 
  
                        P = I x V         ; I = P / V 

Substituting the given values,
                                    I = (25 W) / (230 V) = 0.1087 amperes

Therefore, the current is approximately 0.1087 A. 

4 0
4 years ago
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