18. The figure below shows a U-tube. L-
ha
a) State what happens to the flow if the system above were put in a vacuum.
b) The density of Li and L, are 1.8g/cm and 0.8g/cm'. If h = 8 cm Determine h

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination. at the turning point, how far is the second student from the destination?

The energy released by a nuclear fusion reaction is produced when

An owl dives toward the ground with a constant velocity of 4.40 m/s at 53.0° below the horizontal. the sun is directly overhead and casts a shadow of the owl directly below it. what is the speed (in m/s) of its shadow on level ground?