It’s true there are sections in the periodic table that define the elements.
The circular path that the car is following reveals the presence
of a net force acting on the car.
If there were no net force, pointing toward the center of the circular
path, the car would travel in a straight line.
Answer:
Explanation:
Given
half life 
billion year
10 % to decay i.e. 90 % remaining
And 
where k= constant
t=time
and 
so 
t=0.684 billion year
(b)
t=13.8 billion year
atoms
Answer:
The work-energy theorem states that the work done by the net force acting on a body is equal to the change produced in the kinetic energy of the body.
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If a photon has a frequency of 5.20 × 1014 hertz, then the energy of the photon will be 3.45 x 10^-19 Joules.
<h3>What is photon energy?</h3>
The energy carried by a single photon is referred to as photon energy. The amount of energy is related to the electromagnetic frequency of the photon and consequently <u>inversely proportional t</u>o the wavelength. The higher the frequency of a photon, the greater its energy. The longer the wavelength of a photon, the lower its energy.
<h3>Given: </h3>
frequency = 5.20 × 10^(14) hertz
plank's constant = 6.63 × 10^-34 joule·seconds
<h3>Formula used:</h3>
E = hv
( where E = energy of the photon)
<h3>Solution: </h3>
E = 6.63 x 10 ^(-34) x 5.20 x 10^(14) = 34.476 x 10^ -19 Joules
To learn more about photons :
brainly.com/question/20912241
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