The bathyscaphe dives to 3,652 m below the surface. The average density of seawater may be assumed to be 1,024 kg/m3. Approximate the bathyscaphe as a sphere of diameter 3.1 m. Atmospheric pressure at the ocean's surface is 101 kPa. Determine the net force, in kN, on the bathyscaphe's hull if the interior pressure is maintained at 120 kPa, for the comfort of the scientist inside. All pressures are specified in absolute. The thickness of the hull may be neglected.

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Anybody wanna ? (picture included? )

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)