What causes changes in seasons? Seasons change because of the tilt of the Earth and the planet’s movement around the Sun. Did you know? It takes about 365.25 days for the Earth to orbit the Sun. We have leap years to make up for the extra ¼ day! Why are there only two seasons in […]
How do you know if a graph is direct or inverse?
How do you know if a graph is direct or inverse? Numerically: Direct Variation: Because k is positive, y increases as x increases. So as x increases by 1, y increases by 1.5. Inverse Variation: Because k is positive, y decreases as x increases. Is addition and subtraction inverse relationship? Addition and subtraction are inverse […]
At what altitude do you become weightless?
At what altitude do you become weightless? Any object that is falling freely is weightless, no matter where it happens to be. This can be the International Space Station at a height of 200 miles, a NASA reduced-gravity airplane at a height of several thousand feet, a drop tower at several hundred feet, or you […]
What are the selection rules for vibrational transitions?
What are the selection rules for vibrational transitions? Thus, the selection rule for a harmonic oscillator transition is ∆v = ± 1. The physical meaning of the vibrational selection rule is this: The vibration must change the molecular dipole moment to have a non-zero (electric) transition dipole moment. Which transition between rotational energy levels is […]
Is a car driving fast potential energy?
Is a car driving fast potential energy? The kinetic energy of an object is the energy or force that the object has due to its motion. Your moving vehicle has kinetic energy; as you increase your vehicle’s speed, your vehicle’s kinetic energy increases. Is driving a car potential energy? The moving car has kinetic energy, […]
How do you tell if a freezer is going out?
Which of the following has the smallest atomic radius group of answer choices?
Which of the following has the smallest atomic radius group of answer choices? Helium What is the trend for atomic radius down a group? In general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant. Why does atomic radius increase as […]
Which of the following best describes a sailing vessel?
Which of the following best describes a sailing vessel? A sailing vessel is any vessel under sail, provided that propelling machinery, if fitted, is not being used. A vessel not under command is any vessel, which through unusual circumstances is unable to manoeuvre as required by the Collision Regulations, and so is unable to keep […]
Does ice melt at 2 degrees?
Is nuclear power eco friendly?
Is nuclear power eco friendly? Nuclear energy is considered by some as ecological energy in the sense that producing electricity with nuclear fission emits almost no CO2 or fine particles. On the contrary, coal or oil, and even gas, when put into combustion to produce electricity (or heat, or to power an engine), emit CO2 […]