Athermometer is placed into a flask of water with pieces of ice and reads 273.15. which temperature scale is being used? a. kelvin b. celsius c. centigrade d. fahrenheit

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

What is the stall speed at sea level of an airplane that weights 10000 lbs., has a wing area of 300ft^2, and a maximum lift coefficient of 1.4? what is the stall speed if flaps that double cl,max are applied?

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.