Answer:
t = 17199 years
Explanation:
given,
mass of sample = 1.09 Kg
Activity of living material = 15 decays / min /g
Activity of living material = 15 x 1000 decays /min /kg
Activity of living material per 1.09 kg A = 1.09 x 15 x 1000 decays / min
Activity of after time t is A ' = 2020
half life = 57300 years
desegregation constant
λ = 0.693 / 5700
taking ln both side
t = 17199 years
Answer:
Friction: When two surfaces slide against each other / make contact with each other
Force: A push or pull exerted on an object
There are many different types of precipitation —rain, snow, hail, and sleet for example—yet they all have a few things in common. They all come from clouds. They are all forms of water that fall from the sky.
Bohr's equation for the change in energy is
where
h = Planck's constant
c == the velocity of light
λ = wavelength.
The velocity is related to wavelength and frequency, f, by
c = fλ
Let us examine the given answers on the basis of the given equations.
a. As λ increases, f decreases and ΔE decreases.
TRUE
b. As λ increases, f increases and ΔE increases.
FALSE
c. As λ increases, f increases and ΔE decreases.
FALSE
Answer:
As the wavelength increases, the frequency decreases and energy decreases.
Answer: The Sun measures 1.4 million km across, while the Moon is a mere 3,474 km across. In other words, the Sun is roughly 400 times larger than the Moon. But the Sun also happens to be 400 times further away than the Moon, and this has created an amazing coincidence.
Explanation:
