How do you explain the summer solstice to a child? The summer solstice is the longest day of the year when the Earth’s North Pole is tilted closest to the sun. There are two solstices each year. One in June and one in December. The time of the solstice is the same all over the […]
Which best describes a radioactive isotope?
Which best describes a radioactive isotope? An isotope with an unstable nucleus which decomposes readily and results in the emission of radiation and a nuclear electron or helium nucleus achieves a stable nuclear composition is known as a radioactive isotope. For example, Thus, we can conclude that an atom is unstable best describes a radioactive […]
How can I increase oxygen in my blood?
How can I increase oxygen in my blood? How does oxygen get into the bloodstream? Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body. Can low oxygen levels be […]
Which will have the highest thermal energy?
Which will have the highest thermal energy? gas Which is the most heat energy? What are the characteristics of thermal energy? Thermal energy refers to several distinct physical concepts, such as the internal energy of a system; heat or sensible heat, which are defined as types of energy transfer (as is work); or for the […]
What shape is an orbit?
What shape is an orbit? elliptical What is a bound orbit? A bound orbit is one in which the light object makes many loops around the heavier object. For example, the planets are in bound orbits around the Sun. What’s the difference between a bound and unbound orbit? What is the difference between a bound […]
In which direction do gas molecules move?
In which direction do gas molecules move? Gas molecules move in straight lines in all directions, colliding frequently with one another and with the walls of the container. What are the 4 variables used to describe gases? Ideal Gases Ideal gas, or perfect gas, is the theoretical substance that helps establish the relationship of four […]
What are the scientific method steps?
What are the scientific method steps? Form a hypothesis, or testable explanation. Make a prediction based on the hypothesis. Test the prediction. Iterate: use the results to make new hypotheses or predictions. Which is a scientific question? A good scientific question is one that can have an answer and be tested. For example: “Why is […]
Why is o2 a covalent bond?
Why is o2 a covalent bond? Two covalent bonds form between the two oxygen atoms because oxygen requires two shared electrons to fill its outermost shell. Nitrogen atoms will form three covalent bonds (also called triple covalent) between two atoms of nitrogen because each nitrogen atom needs three electrons to fill its outermost shell. How […]
Is centripetal force equal to gravity?
Is centripetal force equal to gravity? Setting the gravity force from the universal law of gravity equal to the required centripetal force yields the description of the orbit. The orbit can be expressed in terms of the acceleration of gravity at the orbit. The force of gravity in keeping an object in circular motion is […]
Which type of refrigerant has the lowest global warming potential?
Which type of refrigerant has the lowest global warming potential? R-717 What gas is used as the baseline measurement for global warming potential? The metrics universally use carbon dioxide as a baseline for comparisons because it is the dominant greenhouse gas in terms of annual emissions. How do you calculate GWP? You calculate the carbon […]