Does potential energy increase, kinetic energy decrease when a book is placed on a shelf

If two firecrackers produce a combined sound level of 85 dB when fired simultaneously at a certain place, what will be the sound level if only one is exploded?

What are some of the physical and human made features that map symbols can represent

a fission reaction possible is that certain atoms are

How does the length of a rope string or fishing line affect the balance of a mobile kinetic sculpture?

Use the periodic table to find the name, atomic number, atomic mass, and the number of outermost electrons for each of the following elements: N, P, As, and Sb.

Name two practical applications of nanotechnology

if the distance of separation begin two objects is doubled, is the gravitational force between the objects increased or decreased? by what factor?

A researcher measures the thickness of a layer of benzene (n = 1.50) floating on water by shining monochromatic light onto the film and varying the wavelength of the light.

A rock has a height of 4 cm, a length of 5 cm, and a width of 2 cm. what is the volume of the rock?

The filament of a certain lamp has a resistance that increases linearly with temperature. When a constant voltage is switched on, the initial current decreases until the filament reaches its steady-state temperature.