Is it safe to zipline? Researchers at Ohio State University found that almost 12 percent of zip-line injuries resulted in fractures or other injuries requiring hospitalization, making zip-lining mishaps at least as serious as rock climbing. Has anyone died on a zipline? There have been fatal zip-line crashes in the U.S., including two in Utah, […]
Is electricity and magnetism the same?
Is electricity and magnetism the same? 3) Electricity and magnetism are essentially two aspects of the same thing, because a changing electric field creates a magnetic field, and a changing magnetic field creates an electric field. (This is why physicists usually refer to “electromagnetism” or “electromagnetic” forces together, rather than separately.) How can we prevent […]
What is a DNA code?
What is a DNA code? The DNA code contains instructions needed to make the proteins and molecules essential for our growth, development and health. The cell reads the DNA code in groups of three bases. Each triplet of bases, also called a codon, specifies which amino acid? will be added next during protein synthesis. What […]
Is unexpected color change physical or chemical?
Is unexpected color change physical or chemical? Whatever the reaction, it’s important to recognize that one or more new substances are formed! Burning wood is a common example of a chemical reaction because as the wood reacts with oxygen after it has been ignited, it creates smoke and ashes. Signs of a chemical reaction include: […]
What is the direction of velocity in circular motion?
What is the direction of velocity in circular motion? We will see that unlike linear motion, where velocity and acceleration are directed along the line of motion, in circular motion the direction of velocity is always tangent to the circle. This means that as the object moves in a circle, the direction of the velocity […]
What is the difference between dynamics and kinematics?
What is the difference between dynamics and kinematics? Traditionally, motion studies have been divided into two categories: kinematics and dynamics. Kinematics is the study of motion without regard to forces that cause it; dynamics is the study of motions that result from forces. What are kinematic properties? To describe motion, kinematics studies the trajectories of […]
What is the formula for relative speed?
Does lowering a car increase drag?
Does lowering a car increase drag? Lowered vehicles are more aerodynamic. There’s less air hitting the wheels and tires (that are not streamlined shapes). This makes these cars faster. BUT, lowering a car too much will actually increase wind drag. Why is it important to reduce vehicles drag? Automotive manufacturers are placing a growing emphasis […]
Which is the strongest heart valve?
Which is the strongest heart valve? The left ventricle is the largest and strongest chamber in your heart. The left ventricle’s chamber walls are only about 1.0 to 1.3cm, but they have enough force to push blood through the aortic valve and into your body. How does the blood get around the body? Two types […]
Why are healthy root nodules pink in Colour?
Why are healthy root nodules pink in Colour? The pink color is from leghemoglobin, a protein that carries oxygen—similar to the hemoglobin in human blood. The nitrogenase enzyme involved in N fixation is sensitive to oxygen and the leghemoglobin helps reduce oxygen concentrations in the area of the nodule where the nitrogenase enzyme is active. […]