Which of the following is a true statement about virtual images?

you cannot see a virtual image.
a virtual image must be larger than the object.
a virtual image is formed at the position from which the rays appear to have originated.
a virtual image must be upside down.

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

Which planet do you think would be easiest for humans to colonize some day?

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.6 m below the tank bottom which is a = 6.7 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute). report your answer in meters to two decimal places.