Question

please tell me answer of these questions urgently ​

Answer 1

Answer:

7. momentum P= m*v

8. Weeds reduce farm and forest productivity, they invade crops, smother pastures and in some cases can harm livestock. They aggressively compete for water, nutrients and sunlight, resulting in reduced crop yield and poor crop quality. Weeds contaminate produce, for example: Burrs in wool contaminate fleeces.