Why does it occur when the brakes are applied suddenly? Answer: It is due to inertia of motion. When the driver of a fast moving car suddenly applies brakes the passengers in the car? When a moving bus suddenly applies brakes, the passengers sitting in it fall in the forward direction. This can be explained […]
Why are many rocks round?
Why are many rocks round? Maybe you’ve noticed that many of the rocks you see are rounded. These rocks’ jagged edges are a sign that they have fairly recently broken off from a larger block of rock. The reason for this is that over time, weathering tends to make rocks round. What are round rocks […]
Why do land breezes happen at night?
Which magnitude star is brightest?
Which magnitude star is brightest? 1st magnitude Why does the rotational axis of Earth precess quizlet? Why does the rotational axis of Earth precess? The Sun and Moon pull on Earth’s equatorial bulge. Where can we see the pole star? The North Star or Pole Star – aka Polaris – is famous for holding nearly […]
What are safety symbols?
What are safety symbols? Safety symbols, hazard symbols or safety labels are meaningful and recognizable graphical symbols that warn of or identify hazards associated with the location or item. What Colour is safety signs? Health and Safety (Safety Signs and Signals Regulations) 1996 Type Shape Colour WARNING SIGNS These signs give warning of potential risks […]
What are some examples of physical and chemical properties?
What are some examples of physical and chemical properties? Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change. What are the physical properties of materials? A material’s physical properties denote the physical state of materials that are exclusive […]
Which best describes the relationship between speed and velocity?
Which best describes the relationship between speed and velocity? Which best defines the relationship between speed and velocity? Velocity is speed with displacement. Smith is designing a race where velocity will be measured. Which best defines speed? Answer. It is the total distance traveled over the total time. Which best describes velocity? The velocity of […]
What should a solenoid be wrapped around?
What should a solenoid be wrapped around? A solenoid [nb 1] is a coil wound into a tightly packed helix. In physics, the term solenoid refers to a long, thin loop of wire, often wrapped around a metallic core, which produces a magnetic field when an electric current is passed through it. How is an […]
What happens to molecules when air heats?
What happens to molecules when air heats? What happens when air is heated or cooled? 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. This is the concept […]
Why is Group 15 called nitrogen?
Why is Group 15 called nitrogen? The Group 15 elements are generally known as the nitrogen family. All of the elements of this family have five electrons in their outermost energy level. This group is divided into nonmetals, semimetals, and metals by characteristic. Nitrogen is a diatomic gas and phosphorus is a solid. Why is […]