How do you make an electric motor more powerful? We can increase the turning force (or torque) that the motor can create in three ways: either we can have a more powerful permanent magnet, or we can increase the electric current flowing through the wire, or we can make the coil so it has many […]
At what temperature water has highest density?
At what temperature water has highest density? At 39°F (or 3.98°C to be exact) water is the most dense. This is because the molecules are closest together at this temperature. The closer the molecules, the heavier. The farther apart the molecules, the lighter. At what Celsius does water reach its greatest density? four degrees Celsius […]
At what position is the kinetic energy equal to the potential energy?
At what position is the kinetic energy equal to the potential energy? When the kinetic energy is maximum, the potential energy is zero. This occurs when the velocity is maximum and the mass is at the equilibrium position. The potential energy is maximum when the speed is zero. Where does the pendulum have an equal […]
What is hotter sun or lava?
What is hotter sun or lava? But even lava can’t hold a candle to the sun! At its surface (called the “photosphere”), the sun’s temperature is a whopping 10,000° F! That’s about five times hotter than the hottest lava on Earth. A temperature of 27 million degrees Fahrenheit is more than 12,000 times hotter than […]
Can you hit a piece of tissue in mid air with the same amount of force that you can hit a heavy bag?
Is it possible to have no water in the air?
Is it possible to have no water in the air? There will always be some water vapor in the air unless there is no free water on the surface of the planet. We have air with 0.000% water vapor. Living creatures exhale and plants photosynthesize while this is going on. These actions, not surprisingly, place […]
What are two ways to charge an object?
What are two ways to charge an object? There are three ways to charge an object: friction, conduction and induction. Friction involves rubbing on material with another, resulting in electrons moving from one surface to another. Why is there so much static electricity in my house? Static increases when the air gets cold and humidity […]
What is the relationship between valence electrons and ionic charge?
What is the relationship between valence electrons and ionic charge? When forming ions, elements typically gain or lose the minimum number of electrons necessary to achieve a full octet. For example, fluorine has seven valence electrons, so it is most likely to gain one electron to form an ion with a 1- charge. What happens […]
Why do you need to create a plumb line?
What are physical fitness tests?
What are physical fitness tests? A physical fitness test may include a repetition maximum of strength-based exercises, like squats or bench presses, to assess muscular strength. It may also involve performing exercises, like bodyweight squats, until exhaustion, which tests muscular endurance. What are the 7 components of skill related fitness? There are six skill-related fitness […]