Write a select statement that returns these columns from the invoices table: the invoice_number column the invoice_date column the invoice_date column plus 30 days the payment_date column a column named days_to_pay that shows the number of days between the invoice date and the payment date the number of the invoice date’s month the four-digit year of the invoice date when you have this working, add a where clause that retrieves just the invoices for the month of may based on the invoice date, not the number of the invoice month

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.

List and describe the parts of boxford cnc milling machine with pictures?