Answer:
6.4 × 10^7 W/m^2
Explanation:
The sun is assumed a sphere and therefore can be calculated by the surface area of a sphere.
surface area of sphere = 4πr^2 where r is the radius of the earth in m.
r = 6.96 ×10^8 m
substitute the value into the formula
surface area of the sun = 4 × 3.142 × ( 6.96 × 10^8)^2
the sun radiates at a rate of 3.90 × 10^26 W
to calculate the rate of energy emitted per square meter of the sun, we need to divide the rates at which the sun radiates energy per second by the surface area of the sun
that is P/surface area = 3.90 × 10^26 / ( 4 × 3.142 × ( 6.96 × 10^8)^2 = 6.4 × 10^7 W/m^2
Period is defined as the time
required to complete one cycle which is also related to frequency. Period is
presented by an equation P = 1/f where p is the period, and f is the frequency.
The unit is in second. Frequency is defined as the number of circular
revolutions in a given time interval and it is in Hertz (Hz) = 1s^-1. Velocity
s defined as the arc traveled at a given time with the equation v=l/t where v
is the velocity, l is the length and t is time. The unit is in m/s.
The answer would be to add an acid. This would decrease its pH. Hope I helped!
An electric current produces a magnetic field when the current flows through a wire. The correct answer will be A.
The decay function is of the form
where
N₀ = initial amount
k = decay constant
t = hours
The material decays by 10% in 95 hours. Therefore
The time for the half life is given by
Answer: The half life is 625 hours