The work done is 137 joules.
Lifting opposes the acceleration of gravity, which is 9.8 m/sec/sec.
20 x 0.7 x 9.8 = 137 J (kg-m2/sec2)
Preventing wind erosion in a dry, sandy area is feasible through any of the following land-use practices:
a. Tillage - creates soil roughness by making furrows and ridges that are perpendicular to the direction of the wind.
b. Crop rotation - rotations of legumes followed by shrubs followed by trees then back to legumes work best.
c. Intercropping - is the most widely used particularly in countries with desert areas. One of the most popularly used is oasis agriculture that makes use of about 3 layers of vegetation.
Answer:
Some examples of predator and prey are lion and zebra, bear and fish, and fox and rabbit.
Explanation:
Meiosis where gametes are made in order for sexual reproduction.
Answer: the male duct system is a series of ducts the sperm passes through during ejaculation. these are the components of the male duct system epididymis, ductus deferens, ejaculatory duct, and urethra.
Explanation: Below is a diagram of the male duct system
