Category: Physics

What is overweight for a 13-year-old? For example, a 7-year-old boy who is 3 feet 11 inches (119 cm) tall would have to weigh at least 56.9 pounds (25.8 kg) ( BMI = 17.9) to be considered overweight, and a 13-year-old girl who is 5 feet, 3 inches (160 cm) tall would be considered obese […]

What can I use for main water line? PVC is an acronym that stands for polyvinyl chloride. Of the different types of plastic pipe used for water supply, PVC has a wide variety of plumbing uses, from drainage pipe to water mains. It is most commonly used for irrigation piping, home, and building supply piping. […]

How often should I run intervals? Watson suggests keeping the frequency at once per week for both and try to — at the very least — leave at least two days between intervals and long runs. “Otherwise, you may overdo it and suffer from burnout, fatigue or injury,” he says. “This will also allow your […]

Which drum makes a sound that fades away faster? Fading away of sound waves depends on the wavelength of the sound. The one that has a loud sound with high frequency will have a brighter sound. While the more mellow one will have the bassier sound. Therefore, the sound with a more mellow sound will […]

What are the types of systematic errors? Systematic errors may be of four kinds: Instrumental. For example, a poorly calibrated instrument such as a thermometer that reads 102 oC when immersed in boiling water and 2 oC when immersed in ice water at atmospheric pressure. Observational. For example, parallax in reading a meter scale. Environmental. […]

Can K-type stars support life? K stars can live for 17 to 70 billion years, much longer than sunlike stars, which shine on the main sequence for only about 10 billion years. The longer lifespan of a K star would give life on an orbiting planet more time to evolve, if it ever got started. […]

What does reason stand for in life skills? REASON acronym. context. The circumstances, atmosphere, attitudes, and events surrounding a text. You just studied 23 terms! What does the reason acronym stand for in business? Response and Effects Analysis System for Operational Needs What does responsible stand for? Responsibility. Being responsible means being dependable, keeping promises […]

What is centripetal force equal to? The magnitude F of the centripetal force is equal to the mass m of the body times its velocity squared v 2 divided by the radius r of its path: F=mv2/r. According to Newton’s third law of motion, for every action there is an equal and opposite reaction. Why […]

Can we sit on a cloud? Although we can’t really touch clouds you could walk through one. In fact that’s what fog is: a cloud that’s formed close to the ground instead of high in the sky. We can’t touch fog but we can move through it. Although it’s fun to imagine sitting on a […]

What is the relationship between mass and weight of an object? Mass is a measure of how much matter there is in an object, while weight is a measure of the size of the pull of gravity on the object. Mass is the amount of matter in an object. Mass is measured in kilograms (kg). […]