Plz! I use all my points for this! Subscribe to my you tube channel plz.
I only have 8 sub's. I want my channel to get big one day! It's called Addie Nahoe. Listen, plz plz plz, subscribe and hit the nonfiction bell. We'll be making a video today! We have 7 videos up. We'll getting better and better at it. Our first and sec video isn't that good. We'll be getting better I'll promise! Subscribe, like our videos, watch it, and hit the nonfiction bell that looks like a bell! Thanks! Also my little sister's going to be doing it! They're 11! I know this isn't school, but it will be next time!

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length