Category: Physics

What do water ice and steam have in common? When water freezes, its molecules move farther apart, making ice less dense than water. This means that ice will be lighter than the same volume of water, and so ice will float in water. As some of the water vapor cools, we see it as a […]

How fast is a light year? In a vacuum, light travels at 670,616,629 mph (1,079,252,849 km/h). To find the distance of a light-year, you multiply this speed by the number of hours in a year (8,766). The result: One light-year equals 5,878,625,370,000 miles (9.5 trillion km). Why do we use light years to measure distance […]

What does it mean if a charge is in equilibrium? Equilibrium condition states that the magnitude of force F1 and magnitude of force F2 should be equal to one another. How does the electric field due to an infinite line of charge vary with the distance from the line? We have found that the electric […]

What is an example of a stationary object? For example, a heavy bag resting on a bed pushes on the bed because of its downward weight force and the bed pushes back up on the bag with a balancing force as it is squashed under the load. What is the force of a stationary object? […]

What is L in double slit equation? the distance between the slits or sources of the two light waves (d) the perpendicular distance from the point P to a point on the central antinodal line (y) the distance from point P to the sources (L) What is Young’s double slit formula? The equation d sin […]

What are the phases of a star? Stage 1- Stars are born in a region of high density Nebula, and condenses into a huge globule of gas and dust and contracts under its own gravity. This image shows the Orion Nebula or M42 . Stage 2 – A region of condensing matter will begin to […]

Why does cooking oil have a higher boiling point than water? So when I say that oil has a higher boiling point than water, what I am actually saying is that the chemical bonds that hold oil together are stronger than the ones holding water together – it takes more heat to break them apart. […]

What does personification mean? 1 : attribution of personal qualities especially : representation of a thing or abstraction as a person or by the human form. 2 : a divinity or imaginary being representing a thing or abstraction. How do you explain personification to a child? Personification is when you give an animal or object […]

What do you know about the Milky Way? The Milky Way is a large barred spiral galaxy. All the stars we see in the night sky are in our own Milky Way Galaxy. These stars form a large disk whose diameter is about 100,000 light years. Our Solar System is about 25,000 light years away […]

Is U-235 lighter than U 238? uranium-235 has 235 nucleons and uranium-238 has 238 nucleons. The number of protons (which also give a charge to a nucleus) are same in the two, which is 92. The two have different number of neutrons. The former is slightly lighter than the latter. Is vintage uranium glass dangerous? […]