Through gases as the bonds are tightly bound. Mechanical waves travel by vibrating through the medium so the more tight the bonds , the faster the waves.
I believe you ask about speed at the end of the hose:
The volume of the bucket is 225 liters which is equal to 225

.

Hose's cross section can be counted with the typical circle's area formula (with diameter instead of radius, that's why you've got a fraction):


are filled within 15 second.
As the bucket is being filled you can say that it's volume is the volume of the water that flowed out of the hose, then:

The speed of the water can be counted with equation:

After extracting h from the volume's equation you get:

When you count the fraction you get the answer:
Answer:
2.271386111 km/s
Explanation:
1321÷60hrs÷60mins×6.19s=2.27km
Answer:
t = 8.3s
Explanation:
V = 100 m/s U = 0 m/s t = ? a = 12 m/s2
V = U + at
100 = 0 + 12 × t = 100 = 12t
12t = 100
t = 100/12 = 25/3
t = 8.3s
Answer:
a
Explanation:
light can not pass through it completely