Which of the following ia an example of a proper food handling a. only clean the surface when you are done cooking b. place frozen food on the countertop to thaw c. keep all perishable foods inside cabinet d. keep your hand clean while you are cooking

Er.. I would say C or D because it makes the most sense ya know? I would clean the surface before and after cooking. I would place the frozen stuff in the fridge to thaw out pretty good. And I think storing perishable foods inside a cabinet makes sense because it may last longer or taste better. Sorry I'm not too completely sure

Same as before.

Explanation:

we can use momentum conservation to solve the problem.

Let mass of child be m and of the sled be M. Also let both have initial velocity u.

since, child fells off on the sled it will still have same velocity of ''u''.

By momentum conservation we have,

(M + m) x u = m x u + M x v

⇒ Mu=Mv

⇒ u=v

Hence, velocity of the sled remains the same.