What property of exoplanets will affect the amount of wobble that is detected? We all know that the chains of gravity shackle a planet to its star. That star’s enormous gravitational influence keeps its planetary family in orbit. But gravity works both ways: as the planets sweep around in their orbits, they tug on their […]
Is it better to insulate walls or roof?
Is it better to insulate walls or roof? If you were on a very skinny budget and had to make a choice, you would insulate your ceiling first. Installing ceiling insulation can save around 35% on heating and cooling energy. Compare this to insulating your walls. Insulating your walls saves around 15% on heating and […]
What are the symptoms of too much calcium in your blood?
What are the symptoms of too much calcium in your blood? What are the symptoms of a high calcium level? Loss of appetite. Nausea and vomiting. Constipation and abdominal (belly) pain. The need to drink more fluids and urinate more. Tiredness, weakness, or muscle pain. Confusion, disorientation, and difficulty thinking. Headaches. Depression. What foods to […]
What does tidal heating cause?
What does tidal heating cause? The more the tidal force changes, the more the moon stretches, and the more it heats. This heat causes activity like volcanoes and geysers and can keep water liquid to form oceans. Why is tidal heating important? Tidal heating is responsible for the geologic activity of the most volcanically active […]
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 […]
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: […]
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 […]
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 […]