PLEASE HELP!! A lens with f= 20.0 cm creates a virtual image at -37.5 cm (in front
of the lens). What is the object
distance?
(Mind your minus signs.)
(Unit = cm)

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

What are some properties of transverse waves?

Can you match these to the correct definition