Asap plz Which statement describes a controlled experiment? O A. It includes more than one control group.
B. It includes a control group and an experimental group.
C. It includes only an experimental group.
O D. It includes only a control group.

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

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Give an example in which the electrical energy changes to light energy