Answer:
687.5 A
Explanation:
We are given that
Magnetic field,B=0.11 T
Diameter,d=2.5mm
Radius,r=
We know that current in coil
Substitute the values
Answer: 12.15π cm³/min
Explanation:
Given,
Diameter, d = 9 cm
Volume of a sphere, v = 4/3.π.r³
dD/dt = -0.3 cm/min (the negative sign is because it is decreasing)
Volume = 4/3.π.(d/2)³
Volume = 4/3.π.(d³/8)
Volume = 1/3.π.(d³/2)
Volume = 1/6.π.d³
dV/dt = 1/2.π.d².(dD/dt), substituting the value of dD/dt onto this, we have
dV/dt = 1/2.π.9².(-0.3)
dV/dt = 1/2.π.81.-0.3
dV/dt = 1/2.π.-24.3
dV/dt = -12.15π cm³/min
Thus, the volume of the snowball is changing at 12.15π cm³/min
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• Invasive species. The overview of non-native species into an ecosystem can intimidate endemic wildlife, distress human health and upset economies. Scientist solution contain making systems to avoid introduction of invasive species in the first place effectively monitoring for new infestations and fast abolition anew noticed intruders.
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• Climate change. Alterations in climate over our planet past have altered life on earth in the long run which ecosystems have originate and left and species regularly go nonexistent. The solution must be reducing carbon prints and promoting education.
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• Lastly is the pollution. Acid rain which is normally initiated by the burning of fossil fuels can acidify smaller bodies of water and soil harmfully affecting the species that live there by altering breeding and nourishing habits. The solution must combat atmospheric and hydrologic pollution.
