Category: Physics

How can you identify an aggressive driver? Signs of an aggressive driver include the following: Speeding or racing other drivers. Excessive lane changing, swerving in between cars. Blocking other vehicles from changing lanes. Tailgating or riding too close to the car ahead. Yelling obscenities or displaying inappropriate hand gestures. Excessive horn honking. What is it […]

How do I restore my balance in life? Calm the chaos: how to restore balance to your life Take a break. You’ll get more accomplished if you give yourself a 10-minute break every few hours at work, so schedule them in and make sure to take them. Prioritize. Turn off your email. Protect your time. […]

How much does the St Louis Arch sway? The Arch is designed to sway as much as 18 inches, and can withstand an earthquake, however under normal conditions the Arch does not sway. It takes a 50-mile an hour wind to move the top 1 1/2 inches each side of center. Are the St Louis […]

Why do we need to breathe oxygen? Our body needs oxygen to obtain energy to fuel all our living processes. Carbon dioxide is a waste product of that process. The respiratory system, with its conduction and respiratory zones, brings air from the environment to the lungs and facilitates gas exchange both in the lungs and […]

Why are spiral galaxies flat? Because they’re rotating, and fast enough that the galaxy can’t condense in the radial direction. They’re “flat” because the combination of centripetal and gravitational forces causes the matter to oscillate perpendicular to the plane of the galaxy and eventually run into other matter with inelastic collisions. Why is the Milky […]

What is the angle between 2 N and 3 N force is so that their resultant is 4 N? So, So, the angle between two forces should be cos⁻¹(1/4). THANKS! What happens when two forces are perpendicular? When you have two forces acting on an object, these forces can act in the same direction, opposite […]

How do airplanes affect the economy? Connecting Economies Across the Globe Commercial aviation has a direct impact on our nation’s economy, creating more than 10 million well-paying American jobs and driving 5 percent of the U.S. gross domestic product and nearly $1.7 trillion in annual economic activity. What is the economic impact of an airline […]

What are 2 substances needed for photosynthesis? Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar. What is the most important ingredient in photosynthesis? The equation shows that the “ingredients” for photosynthesis are carbon dioxide, water, and light energy. Plants, algae, […]

What are the 3 rules for adding forces? FORCES ARE VECTORS. This means they have both SIZE and DIRECTION. When adding forces, we must add them like lines, taking LENGTH and ANGLE into account. Can 3 unequal vectors add to zero? Since a scalene triangle exists, three unequal vectors can add up to zero. The […]

What are the characteristics of a good molecular clock? An ideal molecular clock has a number of features: rate constancy through time, rate homogeneity across lineages, taxonomic breadth and applicability, and accessibility of the data. Characters that have evolved at a relatively constant rate are the most suitable for molecular clocks. What is the molecular […]