Use the formula below where L is loudness measured in decibels, I is intensity of sound, and I0 is the lowest-intensity sound that the average human ear can detect. L=10logII0 . Suppose the sound intensity of a fan must be reduced by one third. By how many decibels would the loudness be decreased? Hint: Let I1 = present intensity, I2 = reduced intensity, L1 = present loudness, and L2 = reduced loudness. A. about 1.76 dB B. about 2.24 dB C. about 0.25 dB D. about 1.35 dB

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus

Explain why you think this diagram shows what happened to the carbon in the biodome.

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.