In an ideal Brayton cycle, air is compressed from 84 kPa and 25C to 840 kPa. Under cold air standard conditions, the thermal efficiency of this cycle is

Acoil formed by wrapping 80 turns of wire in the shape of a square is positioned in a magnetic field so that the normal to the plane of the coil makes an angle of 28.0° with the direction of the field. when the magnetic field is increased uniformly from 200 µt to 600 µt in 0.400 as, an emf of magnitude 80.0 mv is induced in the coil. what is the total length of the wire?

What is the temperature in degrees celsius of a substance with a tempature of 49k

How are positive ions different from neutral atoms