Which one of the following statements is false?
a. the change in internal energy, δe, for a process is equal to the amount of heat absorbed at constant volume, qv .
b. the change in enthalpy, δh, for a process is equal to the amount of heat absorbed at constant pressure, qp .
c. a bomb calorimeter measures δh directly.
d. if qp for a process is negative, the process is exothermic.
e. the freezing of water is an example of an exothermic reaction.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

1) what is the power in horsepower of a 100 watt light bulb? what is the power in kilowatts of a 200 horsepower engine? 2) if a cars engine is providing 3000 n of force to keep the car moving at 5 m/s, what is the engine’s effective power? 3) how many gallons of water will be pumped from a well 30 feet deep by a 1/2 hp engine in 1 minute? (1 gallon weighs 8.34 pounds)

Select light for the type of wave, adjust the wavelength so that the light is red, and increase the amplitude of the light to the max. then, select the start button at the source location to begin producing the waves. light is a form of electromagnetic wave, containing oscillating electric and magnetic fields. the wave amplitude detector mentioned above shows how the electric field oscillates in time at the location of the probe. the amplitude of the wave at the location of the probe is equal to the maximum electric field measured. how does the amplitude of the wave depend on the distance from the source?