Power:
P= A/t
A = F · h = m · g · h
P = m · g · h / t, m = 7.5 kg, g = 9.81 m/s², h = 8.2 m, t = 1800 s
P = 7.5 · 9.81 · 8.2 / 1800 = 0.335 W
Answer:
3
Explanation:
Because the pressure in the air, it’s causes particles to move farther apart from each other.
Answer D
In alkali earth metals reacrivity increases from top to bottom (opposite of b)
This is because as you go down, the electron shells increase by 1 shell. The farther away a shell is from the nucleus, the higher its tendency to react.
D is true because the more reactive an alkali metal is, the more vigorous the reaction will be with water.
Answer:
Explanation:
Arizona Nevada and California. That includes some pretty big cities. Los Angeles, Las Vegas, San Diego to name 3.
Answer:
Distance of galaxy 1 = 681.82 Million light years.
Distance of galaxy 2 = 909.09 Million light years
Distance of galaxy 3 = 1136.36 Million light years.
Explanation:
Given that Hubble constant is 22km/s/Mly
Galaxy 1 is speed away from us is 15000km/s
Galaxy 2 is speed away from us is 20000km/s
Galaxy 3 is speed away from us is 25000km/s
We have to find distance to each galaxy from Hubbles law.
According to<em> Hubbles law</em> , when galaxies move away from each other the velocity with which they recede ie the red shift in spectra of distant galaxies is proportional to the distance.
Distance=Velocity/Hubble constant
Distance of galaxy 1 = = 681.82 Million light years.
Distance of galaxy 2 = = 909.09 Million light years.
Distance of galaxy 3 = = 1136.36 Million light years.