Is it cruel not to walk your dog? Walking your dog is essential for their health, but not doing it doesn’t make you cruel. You might never do dog walks but instead, spend time together and perform other exercises. Is a 20 minute walk enough for a dog? They have moderate exercise needs with a […]
What are the main causes of floods?
What are the main causes of floods? What Causes a Flood? Heavy rainfall. Ocean waves coming on shore, such as a storm surge. Melting snow and ice, as well as ice jams. Dams or levees breaking. Is flooding caused by humans? There are natural and anthropogenic (human-induced) causes of flooding. Flooding can naturally be attributed […]
Does intensity depend on amplitude?
Does intensity depend on amplitude? The amplitude of a wave is related to the amount of energy it carries. The average amount of energy passing through a unit area per unit of time in a specified direction is called the intensity of the wave. As the amplitude of the sound wave increases, the intensity of […]
Can you start a fire using a convex mirror?
Do standing waves move?
Do standing waves move? Standing wave, also called stationary wave, combination of two waves moving in opposite directions, each having the same amplitude and frequency. Does resonance cause standing waves? Standing waves are always associated with resonance. Resonance can be identified by a dramatic increase in amplitude of the resultant vibrations. Any system in which […]
What happens if 2 spiral galaxies collide?
What happens if 2 spiral galaxies collide? For example, two spiral galaxies can merge and form an elliptical galaxy. Galaxies are also composed of gas and dust. The gravitational pull of both colliding stars can interact with this materials, creating friction and shock waves that can ignite the formation of new stars. What will happen […]
How much energy does fusion release?
How much energy does fusion release? Each D-T fusion event releases 17.6 MeV (2.8 x 10-12 joule, compared with 200 MeV for a U-235 fission and 3-4 MeV for D-D fusion). On a mass basis, the D-T fusion reaction releases over four times as much energy as uranium fission. What are the cons of nuclear […]
What is the relationship between S and P waves?
What is the relationship between S and P waves? P waves travel fastest and are the first to arrive from the earthquake. In S or shear waves, rock oscillates perpendicular to the direction of wave propagation. In rock, S waves generally travel about 60% the speed of P waves, and the S wave always arrives […]