*Question*
Q: Displacement, velocity, acceleration, and force are examples of what type of quantity that has magnitude and direction? Read this paragraph and choose the correct option from the provided answers: Vectors in Two Dimensions A vector is a quantity that has magnitude and direction. Displacement, velocity, acceleration, and force, for example, are all vectors. In one-dimensional, or straight-line, motion, the direction of a vector can be given simply by a plus or minus sign. In two dimensions (2-d), however, we specify the direction of a vector relative to some reference frame (i. , coordinate system), using an arrow having length proportional to the vector's magnitude and pointing in the direction of the vector. Figure 3.9 shows such a graphical representation of a vector, using as an example the total displacement for the person walking in a city considered in Kinematics in Two Dimensions: An Introduction. We shall use the notation that a boldface symbol, such as D , stands for a vector. Its magnitude is represented by the symbol in italics, D , and its direction by . Vectors in this Text In this text, we will represent a vector with a boldface variable. For example, we will represent the quantity force with the vector F , which has both magnitude and direction. The magnitude of the vector will be represented by a variable in italics, such as. Choices: - cycles - wave - frequency - vector A:
**Answer**
vector

*Question*
Q: What is the study of the energy transformations that occur in a collection of matter? Read this paragraph and choose the correct option from the provided answers: Choices: - fluctuations - geophysics - kinetics - thermodynamics A:
**Answer**
thermodynamics

*Question*
Q: What are the egg shaped organs on either side of the uterus? Read this paragraph and choose the correct option from the provided answers: The two ovaries are small, egg-shaped organs that lie on either side of the uterus. They produce eggs and secrete estrogen. Each egg is located inside a structure called a follicle. Cells in the follicle protect the egg and help it mature. Choices: - lungs - testes - kidneys - ovaries A:
**Answer**
ovaries

*Question*
Q: What is the name of the black opening in the eye that lets light enter? Read this paragraph and choose the correct option from the provided answers: Next, light passes through the pupil. The pupil is a black opening in the eye that lets light enter the eye. Choices: - iris - cornea - inlet - pupil A:
**Answer**
pupil