Answer:
Sometimes
Explanation:
Sometimes meaning in occasions. If it is a "vampire star" not likely because they also cause they also make novas happen by sucking the gas from another star.
Answer:
The acceleration is -9.8 m/s²
Explanation:
Hi there!!
When you throw a ball upward, there is a downward acceleration that makes the ball return to your hand. This acceleration is produced by gravity.
The average acceleration is calculated as the variation of the speed over time. In this case, we know the time and the initial and final speed. Then:
acceleration = final speed - initial speed/ elapsed time
acceleration = -4.3 m/s - 4.3 m/s / 0.88 s
acceleration = -9.8 m/s²
Answer:
Explanation:
6 waves in 12 seconds
The period of a wave is defined as the time taken by the wave to complete one oscillations.
Here, 6 waves are completed in 12 seconds
So, one wave is completed in 2 seconds
So, the period of the wave is 2 second.
frequency is defined as the number of waves completed in one second. It is the reciprocal of period of the wave.
frequency = 1 / 2 = 0.5 Hertz
Let the wavelength is λ.
f = 660 kHz = 660000 Hz
the relation for the wave speed and the wavelength and the frequency is given by
v = f λ
where v is the speed of wave = 3 x 10^8 m/s
So, 3 x 10^8 = 660000 x λ
λ = 454.55 m
this has something to do with black body radiation and absorption
