Benjamin Banneker Published his almanac based on his astronomical calculations in 1792. Hope this helps:)
Answer:
C) U-235
Explanation:
On Isotope stability, an isotrope will be least stable when Proton and newtron are both odd.
They are composed of unbroken chains of covalent carbon to carbon bonds
Explanation:
Answer:
An increase in frequency
Explanation:
A photon is an electromagnetic radiation without mass,as the energy of a photon is increased it frequency also increases.
Consider the equation below.
Energy = hf
We're h= is the Planck constant.
F is the frequency measured in Hertz from this a direct relationship exist between the energy and frequency
Answer:
The wall is 680 meter away from the person.
Explanation:
Given data
Speed of sound = 340 
Given that Persons said hello toward the opposite side she has an echo hello 4 seconds later means it takes 2 seconds for the sound to reach the wall & again 2 seconds to reach the persons ear.
Therefore the distance between the person & wall is
D = speed × Time
D = 340 × 2
D = 680 meter
Therefore the wall is 680 meter away from the person.
