A research assistant in a lab conditions dogs to salivate to the sound of a bell. During conditioning, the assistant deliberately manipulates the interval between the sound of the bell and the presentation of food. After conditioning, he measures how much the dog salivates when the bell is presented alone. The interval is the variable. The amount of salivation is the variable. A) dependent; experimentalB) dependent; independentC) independent; controlD) independent; dependent

D. independent; dependent

Explanation:

The dependent variable is the variable that is being measured during the course of an experiment. It represents the variable that changes with the manipulation of other variables.

The independent variables are variables which are varied or manipulated during the course of an experiment. The effects of their variations are measured on the dependent variable.

In this case, the interval between the bell and presentation of food was varied and the effects of the variation was measured by determining the amount of salivation.

Hence, the interval is the independent variable and the amount of salivation is the dependent variable.

The correct option is D.

graph slopes whilst gas cools, then it is flat whilst conensation to liquid happens, the coolong liquid then graphs as a slope when it solidifies graph is flat

latent heat

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force