The negative-gain op amp circuit is supposed to reverse the sign of \mathbf{v}_\mathbf{s} i. e \mathbf{v}_\mathbf{0} is equal to \mathbf{v}_\mathbf{s} multiplied by a negative gain of the op amp. Do you observe this in your measurement of \mathbf{v}_0? If not explain why the negative gain op amp circuit does not invert the sinusoidal input voltage.

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .