Electromagntic wave, such as an X-ray.
Explanation:
- Electromagnetic wave does not require any medium to travel. These waves propagate outwards from the source.
- They can travel even through the vacuum of outer space.
- The major source is the sun which emits radiation in the form of the Electromagnetic spectrum.
- These waves travel through oscillating electrical and magnetic fields generated by the oscillating charged particles.
- These waves oscillate in the perpendicular direction of planes concerning each other and are in form.
- Electromagnetic waves travel at speed of light.
Explanation:
The United States is known for being very diverse due to the fact that people have emigrated to the US. This is because people want to live the "American Dream" and have a successful career and family. If someone is facing hardships in their home country, they will try to move to the US to start a better life.
The regions of light and unpredictable winds at about 30° No latitudes are called <u>trade winds</u>
Answer: Option A
<u>Explanation:</u>
Trade winds are the latitudes which cool and descend at 30 degree north and are areas with surface winds but these surface winds are light and unpredictable. These are the winds that blow towards the equator.
Trade winds blow at an average speed of about 5 to 6 meters per second and these winds are unpredictable. These winds are warm winds and therefore they pick up moisture and bring heavy rainfall.
Answer:
The correct answer is A. A disadvantage of shade-grown coffee beans is that shade-grown coffee trees produce fewer coffee beans per plant.
Explanation:
The expression “shade coffee” designates coffee produced on trees cultivated under a canopy rather than in vast fields exposed to the sun, which in turn is a very productive technique but requires, for the maintenance of a high yield, the irrigation and spreading of large quantities of polluting pesticides and fertilizers. Rather, shade trees protect coffee trees from rain and sunlight, help preserve soil quality, reduce the amount of weed control needed, and provide habitat for a diverse range of wildlife. The organic matter produced by these trees also provides natural mulch which reduces the need for chemical fertilizers, prevents erosion and provides important nutrients to the soil. But the negative part of this type of coffee growing is that it produces a lesser amout of coffe beans.
