Ahouse in logan, utah has no central air conditioning system. daytime temperatures in the summer regularly exceed 32°c (90°f) but nighttime temperatures are cool. a logan

homeowner wishes to install a fan with diameter 0.5 m in the ceiling of her home to withdraw air from the interior of her house at night and discharge it outside of the house,

which will pull the cooler night air in through her open windows. the interior volume of her home is 720 m^3 . if she wishes air within her home to be exchanged fully at least every 20 min, calculate:

a. the minimum flow rate of the fan in m^3/s

b. the mean discharge air speed in m/s.

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

it becomes positively charged by charging it

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia