Select the best option to explain why the moon is described as a time capsule for Earth’s history? Question 4 options:

The Apollo astronauts placed a time capsule on the moon’s surface.

The moon has not experienced any changes since its formation.

The moon does not have weather to erode the evidence of asteroid impacts.

Use the table to answer question 22 23 and 24.

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.