Before the launch, the momentum of the (spacecraft + asteroid) was zero. So after the launch, the momentum of the (spacecraft + asteroid) has to be zero.
Momentum = (mass) x (velocity)
Momentum after the launch:
Spacecraft: (1,000 kg) x (250 m/s) = 250,000 kg-m/s
Asteroid: (mass) x (-25 m/s)
Their sum: 250,000 - 25(mass) .
Their sum must be zero, so 250,000 kg-m/s = (25 m/s) x (mass)
Divide each side by 25 : 10,000 kg-m/s = (1 m/s) x (mass)
Divide each side by (1 m/s) : 10,000 kg = mass
Answer:
Sherman is right about the green used to camoflauge the dragonflies.
He is wrong about them being the **same** dragonflies.
<span> the angle of reflection is
30 degrees</span>
Answer:
The distance of the star is meters
Explanation:
It is known that the speed of light has a value of in vacuum. That is, it travels in one second, according with the following equation:
Where v is the speed, x is the distance and t is the time.
(1)
Equation 1 can be used to determine the distance that the light travels in 1 year:
It is necessary to find how many seconds are in 1 year (365.25 days).
⇒
Therefore, in 1 year, light travels meters.
<em>If the distance to a star is 3.6 light-years, what is this distance in meters? </em>
A simple conversion between units can be used to get the distance in meters
<em> ⇒ </em>
Hence, the distance of the star is meters.