1) A transformer has a primary side that contains 1500 turns and it is connected to 120V AC. If a motor connected to the transformer requires 7.5A at 24V, find, (a) the number of secondary turns required. (b) the primary current. 2) A single-phase transformer is rated as 250V, 100A. The transformer has copper losses of 450W and iron losses of 225W. Determine the transformer efficiency at full load and 0.8 power factor, PF.

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

What rotation was applied to triangle def to create d’e’f’?