What is a simple definition of motion? In physics, motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time. Thus, everything in the universe can be considered to be in motion. What is distance in science definition? Distance […]
What does better angular resolution mean?
What does better angular resolution mean? What does better angular resolution mean? you can see smaller details. Only $2.99/month. True or false: X rays from astronomical objects can only be detected from telescopes in space. Is a bigger angular resolution better? “higher” resolution doesn’t mean better, it means only bigger objects can be resolved; but […]
What is an example of the James-Lange Theory?
What is an example of the James-Lange Theory? The James-Lange theory states that stimulating events trigger a physical reaction. The physical reaction is then labeled with a corresponding emotion. For example, if you run into a snake, your heart rate increases. James-Lange theory suggests that the increase in heart rate is what makes us realize […]
What is difference between step-up and step-down transformer?
What is difference between step-up and step-down transformer? The main difference between the step-up and step-down transformer is that the step-up transformer increases the output voltage, while the step-down transformer reduces the output voltage. What is the function of step up and step down transformers? A transformer designed to increase the voltage from primary to […]
What is causing the orbital velocity of object A to be increasing?
What is causing the orbital velocity of object A to be increasing? Inertia of the moving body tends to make it move on in a straight line, while gravitational force tends to pull it down. The more massive the body at the centre of attraction, the higher is the orbital velocity for a particular altitude […]
What is the economic impact of coal?
What is the economic impact of coal? These include the direct employment of nearly 150,000 people and the creation of 3.3 jobs for every job in coal mining, for a total of more than 500,000 jobs. Coal generated $26 billion in sales and paid $13 billion in direct wages and salaries according to 2016 analysis […]
Is ice melting endothermic or exothermic?
Is ice melting endothermic or exothermic? As a result, the temperature of the ice rises and it turns into water! Basically, melting ice is an endothermic reaction because the ice absorbs (heat) energy, which causes a change to occur. Does an exothermic reaction release heat? An exothermic process releases heat, causing the temperature of the […]
How far up do balloons go?
How far up do balloons go? Toy balloons burst at around 10km, while professional meteorological balloons reach heights of 30km. The ultimate limit is set by Archimedes’s Principle, which says balloons will stop rising once their density matches the surrounding air. So there’s no chance of balloons entering the vacuum of space. Where do balloons […]
What is a geologic gap?
Does air expand when its hot?
Does air expand when its hot? As the molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled. Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward. Do inert […]