URGENT Figure 4.1 shows equipment placed on top of a house that uses solar energy to produce hot water.

Answer the given questions in the picture.

• Black objects have the ability to “absorb” the most thermal energy and reflect minimal visible light radiation.

• The solar panels are most energy-efficient in the color black as they store the most ‘energy.’

• The black material absorbs the solar radiation very well , And as the material heats up the water it surrounds.

• The sun's thermal energy heats the fluid in the solar collectors. Then, this fluid passes through a heat exchanger in the storage tank, transferring the heat to the water.

• The non-freezing fluid then cycles back to the collectors. These systems make sense in freezing climates.

• Solar water heaters work by absorbing energy from the sun's rays in roof mounted solar collectors and transferring it to the water stored in the ground mounted storage tank.

•Ground mounted systems employ inbuilt pumps to push the fluid through the system.

• A ridged piece of insulation (or bottom board) will help prevent heat loss into the floor, and could save you another 4%–9% of water heating energy. It is best done when installing a new water heater.

• These layers are poor conductors of heat, and act like a barrier for heat transmission from outside to the water stored inside the tank.

• This ensures that the water inside is less affected by the harsh climate outside, be it freezing temperatures or very high heat .

Water heater tanks are usually insulated with fiberglass blanket insulation. Foil-faced fiberglass can be used or a kit that includes fiberglass insulation with a plastic cover and tape can be purchased. Install the jacket by wrapping it tightly around the sides of the tank and securing it with tape.

i guess it’s a and b

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement