A boy tosses a coin straight up to 2.2 m. Suppose the height when the coin leaves his hand is 1.2 m. What was the initial speed of the coin when it left his hand?

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Could someone . i have tried to solve myself but my calculation is off

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.