Answer:
959183.7 kg
Explanation:
from the question we have :
young modulus = 5 x 10^{9} N/m^{2}
strain = 2% = 2÷100 = 0.02
diameter = 0.03 m
radius = 0.015 m
acceleration due to gravity (g) = 9.8 m/s^{2}
we can get the mass from the formula below
young modulus = stress ÷ strain
where
stress = \frac[force}{area} = \frac {mass x g}{area}
area = 2πr = 2π x 0.015 = 0.094
therefore
young modulus = \frac{\frac {mass x g}{area}}{strain}
5 x 10^{9} = \frac{\frac {mass x 9.8}{0.094}}{0.02}
mass = \frac{5 x 10^{9} x 0.02 x 0.094}{9.8}
mass = 959183.7 kg
The answer is; A
Fertilizer application can be detrimental when there is overapplication. The excess nutrients are washed away by runoff after precipitation. These nutrients end up in water bodies and cause algal blooms. Algal blooms asphyxiate aquatic life hence causing a drastic reduction in aquatic populations.
Answer: C. illuminance of a surface.
a) Incandescence: The phenomenon of light emission by a body as a result of high temperature.
B. Luminous flux : It is the quantity of the energy of the light emitted per second in all directions.
C. Illuminance of a surface :describes the quantity of light emitted by a light source or received at a surface.
D. luminous intensity : the quantity of visible light that a point source radiates in a given direction.
The formula for centripetal acceleration is v^2/r, where v is the tangential velocity, and r is the radius.
<span>Alternatively, w^2r where w is the angular velocity and r is the radius.
</span><span>The centripetal acceleration is ar=(((1.70 rev/s)*(2*pi rad/rev))^2)*(0.132m)= 15.06 m/s^2 </span>