What is the mass of the table tennis ball that accelerated at 5m/s² when 0.5N force is applied.​

Which of these has the least impact on the climate of a place

What are the answers for the following questions?

Which barrier to economic development is shown in the following examples? i. the high rate of hiv infection in underdeveloped nations ii. the use of children as soldiers in uganda’s army in the early 2000s iii. low literacy rates in underdeveloped nations with limited exposure to adequate education a. foreign debt b. political instability c. widespread disease d. low levels of social welfare