Astraw placed in a clear glass of water appears to break at the water’s surface. which explains this effect? a). the water is transparent, but the glass is translucent. scattering causes the straw to appear broken. b). the water is transparent, but the straw is opaque. diffuse reflection causes the straw to appear broken. c).the water and the glass are transparent. refraction causes the straw to appear broken. d). the water and the glass are translucent. the broken appearance of the straw is a mirage.

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

You will be galileo perform the experiment to determine if objects with different mass fall at the same, or different, rates in the air and in a vacuum. (refer to the walk-through video to locate the online lab within the online textbook).

More solar radiation is absorbed by earth’s surface than by