In some countries, up to 30% of the food harvested is lost to spoilage due to pest infestation and contamination. in hot and humid climates, spoilage due to rot is especially a concern. elaborate on how nuclear energy and radioisotopes reduce spoilage, eliminate pests and extend shelf life. a) irradiation of the harvest using low doses of gamma radiation. b) crops are sprayed with alpha irradiated chemicals. c) fields are irradiated with gamma radiation. d) beta irradiation at the grocery store.

Which of the following always exist between two objects having mass ● elastic force ● contact force ●gravitational force ●magnetic force

An ecosystem is shown in the illustration. assume that human activities have led to a decrease in the number of eagles. a virus attack on rabbits has led to a decrease in their population in the ecosystem. which two sentences describe likely effects on the ecosystem? 1. there’s an increase in the number of snakes and insects and a decrease in the number of frogs. 2. there’s an increase in the number of snakes and insects, and the storks face increased competition for food. 3. there’s an increase in the number of storks and a decrease in the number of snakes and insects. 4. there’s an increase in the number of frogs and a decrease in the number of storks and insects. 5. there’s a decrease in the number of snakes, insects, and frogs.

Trey has answered 15 e-mails. this is 20% of e-mails he must answer. how many e-mails does he need to answer? pls ; op'; ; p'[o; pio; uiylutryte