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- https://phys.libretexts.org/Courses/HACC_Central_Pennsylvania's_Community_College/Introduction_to_Physical_Science/03%3A_Work_and_Momentum/3.04%3A_Lecture_4_-_PowerThe lesson is based on section 7.7 in the OpenStax College Physics textbook. The lecture slides are provided in PowerPoint, Keynote, and pdf format.
- https://phys.libretexts.org/Courses/HACC_Central_Pennsylvania's_Community_College/Introduction_to_Physical_Science/10%3A_Molarity_and_Chemical_Equations/10.01%3A_Lecture_1_-_Formula_Mass_and_the_Mole_ConceptThe lesson is based on section 3.1-3.2 in the OpenStax Chemistry 2e textbook. The lecture slides are provided in PowerPoint, Keynote, and pdf format.
- https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Astronomy_1e_(OpenStax)/25%3A_The_Milky_Way_Galaxy/25.01%3A_The_Architecture_of_the_GalaxyThe Milky Way Galaxy consists of a thin disk containing dust, gas, and young and old stars; a spherical halo containing populations of very old stars, and globular star clusters; a thick, more diffuse...The Milky Way Galaxy consists of a thin disk containing dust, gas, and young and old stars; a spherical halo containing populations of very old stars, and globular star clusters; a thick, more diffuse disk with stars that have properties intermediate between those in the thin disk and the halo; a peanut-shaped nuclear bulge of mostly old stars around the center; and a supermassive black hole at the very center. The Sun is located roughly halfway out of the Milky Way.
- https://phys.libretexts.org/Bookshelves/Astronomy__Cosmology/Astronomy_1e_(OpenStax)/21%3A_The_Birth_of_Stars_and_the_Discovery_of_Planets_outside_the_Solar_SystemDo planets orbit other stars or is ours the only planetary system? In the past few decades, new technology has enabled us to answer that question by revealing nearly 3500 exoplanets in over 2600 plane...Do planets orbit other stars or is ours the only planetary system? In the past few decades, new technology has enabled us to answer that question by revealing nearly 3500 exoplanets in over 2600 planetary systems. Even before planets were detected, astronomers had predicted that planetary systems were likely to be byproducts of the star-formation process. In this chapter, we look at how interstellar matter is transformed into stars and planets.
- https://phys.libretexts.org/Courses/Joliet_Junior_College/Physics_201_-_Fall_2019v2/Book%3A_Custom_Physics_textbook_for_JJC/09%3A_Linear_Momentum_and_Collisions/9.06%3A_Conservation_of_Linear_Momentum_(Part_2)If we define a system that consists of both Philae and Comet 67/P, then there is no net external force on this system, and thus the momentum of this system is conserved. (We’ll neglect the gravitation...If we define a system that consists of both Philae and Comet 67/P, then there is no net external force on this system, and thus the momentum of this system is conserved. (We’ll neglect the gravitational force of the sun.) Thus, if we calculate the change of momentum of the lander, we automatically have the change of momentum of the comet.
- https://phys.libretexts.org/Courses/College_of_the_Canyons/Physci_101_Lab%3A_Physical_Science_Laboratory_Investigations_(Ciardi)/11%3A_Investigation_10_-_Weight_of_Mass/11.2%3A_IntroductionIsaac Newton called mass the quantity of matter. Mass can also be thought of as a numerical measure of inertia, that exists in the absence of gravity. Weight is the pull of gravity on a mass, and depe...Isaac Newton called mass the quantity of matter. Mass can also be thought of as a numerical measure of inertia, that exists in the absence of gravity. Weight is the pull of gravity on a mass, and depends both on the mass and on the amount of gravitational force present. Equation for Weight: W=mg Contributors and Attributions Template:ContribCCPhySc101L
- https://phys.libretexts.org/Courses/Joliet_Junior_College/Physics_201_-_Fall_2019v2/Book%3A_Custom_Physics_textbook_for_JJC/12%3A_Temperature_and_Kinetic_Theory/12.06%3A_The_Kinetic_Theory_of_GasesGases are literally all around us—the air that we breathe is a mixture of gases. Other gases include those that make breads and cakes soft, those that make drinks fizzy, and those that burn to heat ma...Gases are literally all around us—the air that we breathe is a mixture of gases. Other gases include those that make breads and cakes soft, those that make drinks fizzy, and those that burn to heat many homes. Engines and refrigerators depend on the behaviors of gases, as we will see in later chapters. As we discussed in the preceding chapter, the study of heat and temperature is part of an area of physics known as thermodynamics.
- https://phys.libretexts.org/Courses/Joliet_Junior_College/Physics_201_-_Fall_2019/Book%3A_Physics_(Boundless)/03%3A_VectorsVectors are essential to physics and engineering. Many fundamental physical quantities are vectors, including displacement, velocity, force, and electric and magnetic vector fields. Scalar products of...Vectors are essential to physics and engineering. Many fundamental physical quantities are vectors, including displacement, velocity, force, and electric and magnetic vector fields. Scalar products of vectors define other fundamental scalar physical quantities, such as energy. Vector products of vectors define still other fundamental vector physical quantities, such as torque and angular momentum.
- https://phys.libretexts.org/Courses/College_of_the_Canyons/Physci_101_Lab%3A_Physical_Science_Laboratory_Investigations_(Ciardi)/27%3A_Investigation_26_-_Holiday_Lights/27.2%3A_IntroductionDevices in a series circuit are connected in one continuous loop while devices within a parallel circuit are connected in multiple loops. A short circuit is a path of least resistance in the electrica...Devices in a series circuit are connected in one continuous loop while devices within a parallel circuit are connected in multiple loops. A short circuit is a path of least resistance in the electrical circuit which bypasses the devices that the circuit is intended to operate. The resistance is added differently in each type of circuit because of how current flows across each device in series versus parallel circuits.
- https://phys.libretexts.org/Courses/College_of_the_Canyons/Physci_101_Lab%3A_Physical_Science_Laboratory_Investigations_(Ciardi)/45%3A_Investigation_44_-_Chemistry_in_a_Ziploc_Bag/45.1%3A_MaterialsBaking Soda (NaHCO3) Calcium Chloride (CaCl2) (in 2-3 mm pellets) Phenol Red (C19H14O5S) Solution 3 Plastic Pipettes (Small Tip) 7 Ziploc Bags (Quart Size) DI Water Notes Th...Baking Soda (NaHCO3) Calcium Chloride (CaCl2) (in 2-3 mm pellets) Phenol Red (C19H14O5S) Solution 3 Plastic Pipettes (Small Tip) 7 Ziploc Bags (Quart Size) DI Water Notes There should be a solid waste container for this lab. Use appropriately labeled spoons for each substance to avoid cross contamination. Contributors and Attributions Template:ContribCCPhySc101L
- https://phys.libretexts.org/Courses/Joliet_Junior_College/Physics_201_-_Fall_2019v2/Book%3A_Custom_Physics_textbook_for_JJC/14%3A_Thermodynamics/14.20%3A_The_Second_Law_of_Thermodynamics_(Exercise)For the entire cycle, calculate (a) the work done by the gas, (b) the heat into or out of the gas, (c) the change in the internal energy of the gas, and (d) the change in entropy of the gas.
