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3 years ago

Which speed is measured in speedometer to track speed violation?

Physics

1 answer:

damaskus [11]3 years ago

4 0

Answer:

Infrared radiations in radar gun

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A planet is 15 light years from earth. At which of the following speeds will the crew of a spaceship complete the trip to the pl

Svetradugi [14.3K]

Answer:

option c) 0.88c is the correct answer

Explanation:

using the Lorrentz equation we have

$t=\frac{d}{v}\sqrt{1-(\frac{v}{c})^2}$

where,

t = time taken to cover the distance

d = Distance

v = velocity

c = speed of light

given

d = 15 light years

Now,

$8years=\frac{15years\times c}{v}\sqrt{1-(\frac{v}{c})^2}$

$(\frac{v}{c})^2\times (\frac{8}{15})^2=1-(\frac{v}{c})^2$

$(\frac{v}{c})^2\times 0.284=1-(\frac{v}{c})^2$

$(\frac{v}{c})^2\times 0.284 + (\frac{v}{c})^2 =1$

$(1.284\times \frac{v}{c})^2 =1$

$(\frac{v}{c}) =\sqrt{\frac{1}{0.284}}$

$v=0.88c$

7 0

3 years ago

A net force of 10.N accelerates an object at 5.0 m/s^2. What net force would be required to accelerate the same object at 1.0 m/

Leokris [45]

Answer:

I believe the answer is 2.0

Explanation:

4 0

3 years ago

Pls answer need help

igomit [66]

Answer:

See below

Explanation:

Find the NET forces on the objects

A 20==>

B 0

C 30==>

D 15==>

So biggest accel = C because it has the most force acting on it

next is A because it has the next biggest force

next is D then B ...B has no net force acting on it

6 0

3 years ago

I really need your help I will mark you brainliest!

Artist 52 [7]

Https://www.lsop.colostate.edu/wp-content/uploads/sites/6/2014/10/HurricanesGoCounterclockwise.pdf

4 0

3 years ago

Sobre un recipiente lleno de agua se sumerge completamente un objeto que desplaza un volumen de 0.096 metros cúbicos de agua hac

Licemer1 [7]

Answer:

Fb = 941.76 [N]

Explanation:

La fuerza de flotacion se define como el producto de la densidad del liquido por la aceleración gravitacional y por el volumen desplazado

Fb = Ro*g*V

donde:

Fb = fuerza de flotacion [N] (unidades del Newtons)

Ro = densidad del liquido = 1000 [kg/m³]

g = aceleracion gravitacional = 9.81 [m/s²]

V = volumen desplazado = 0.096 [m³]

Reemplazando:

Fb = 1000*9.81*0.096

Fb = 941.76 [N]

7 0

3 years ago