Which best describes the relationship between brightness B and distance d )? Inverse Square Law of Brightness The Apparent Brightness (B) of a source is inversely proportional to the square of its distance (d): Implications: It will appear 22=4 times brighter. Which type of dwarf is largest? A typical white dwarf is about as massive […]
What is the potential energy at the top of the hill?
What is the potential energy at the top of the hill? The amount of potential energy is dependent upon mass and height and is found using the equation PE=m*g*h where g is the acceleration of gravity (approximated here to be 10 m/s/s). For a 50-kg sledder on top of a 4.0-meter high hill, the potential […]
Can you rotate your body in mid air?
Can you rotate your body in mid air? One cannot change one’s angular momentum in mid-air, other than by interaction with the air. A sky-diver, falling through the air after the first few seconds, is falling at “terminal velocity”. Can you rotate in the air? Jump into the air, you can turn your body. Physicists […]
When light interacts with matter 3 things can happen?
When light interacts with matter 3 things can happen? Light can interact with matter in three ways: absorption, transmission, and reflection. 1. ABSORPTION – When a light wave with a identical frequency to an electron’s natural frequency “impinges” upon an atom, the electrons will begin to vibrate as a result (almost like they are “set […]
What is the charge for calcium ion?
Why is the mitochondria a bad organelle?
Why is the mitochondria a bad organelle? Because mitochondria are essential to so many cellular processes, when anything goes wrong with these organelles, they could be linked to many diseases. Recent discoveries have connected malfunctioning mitochondria to Parkinson’s, heart disease, diabetes, and cancer. What is the most important organelle in a plant? The Nucleus is […]
Can you get cancer from sitting in front of a heater?
Can you get cancer from sitting in front of a heater? We know what it is, but there have been very few direct sources of interference to the natural body functions, that result in the mutations of the cell divisions, that is commonly called ‘cancer’. Sitting in front of an “infra Red” heater, is not […]
How do you calculate the buoyant force of water?
How do you calculate the buoyant force of water? In general, the buoyancy force on a completely submerged object is given by the formula: FB=Vρg, where V is the volume of the object, ρ is the density of the fluid, and g is gravitational acceleration. What buoyancy means? 1a : the tendency of a body […]
How do you do intervals on a histogram?
How do you do intervals on a histogram? To make a histogram, follow these steps: On the vertical axis, place frequencies. Label this axis “Frequency”. On the horizontal axis, place the lower value of each interval. Draw a bar extending from the lower value of each interval to the lower value of the next interval. […]
How do trees interact with other organisms?
How do trees interact with other organisms? How do trees interact with other organisms? a. They provide other organisms with food. They receive shelter from other organisms. Which of the following is not released by trees into the atmosphere? ozone Which of the following is released by trees into the atmosphere? Through a process called […]