Category: Physics

Can an electric motor be a generator? You can generate an alternating current with a fractional horsepower motor. For convenience, the motor should be mounted on a board, as shown, with 4 mm sockets allowing connections to the rotor and stator windings. Connect the armature (rotor) windings to the demonstration meter. What is AC motor […]

What is the cause of internal heat? Usually, your hypothalamus and autonomic nervous system keep your body within a degree or two of your normal temperature. However, there are times when your body heat rises. This condition is known as heat stress. Heat stress may be due to extreme heat, certain foods, or other factors. […]

How do you calculate the force of an object moving? Multiply mass times acceleration. The force (F) required to move an object of mass (m) with an acceleration (a) is given by the formula F = m x a. So, force = mass multiplied by acceleration. How do you keep an object at constant velocity? […]

How are lenses used in everyday life? Lenses are used to focus light. Because focusing light is so important, you can find lenses in many places. Perhaps the most common lens that we see are the ones in peoples glasses. Glasses put another lens in front of the eye to help focus the light better […]

How long does it take to shutdown a nuclear plant? A reactor SCRAM or emergency shutdown takes between 1 and 5 seconds. A controlled shutdown takes 6 to 10 hours. Stephen Frantz, Worked in nuclear energy for a few decades. As others have said, to make it subcritical (stop the chain reaction) only a few […]

Which is the lightest state of matter? Aerogels are the lightest solids and have a density of 1.9 mg per cm3 or 1.9 kg/m3 (526.3 times lighter than water). What is it called when a solid turns directly into a gas? Sublimation is the process of transformation directly from the solid phase to the gaseous […]

What should you never put in a microwave? 15 things to never put in the microwave Paper bags. Paper bags can release toxins that can potentially catch fire. Take-out containers. If the container has any metal, don’t put it in the microwave! Yogurt & butter containers. Eggs. Styrofoam. Grapes. Cookware with metal trim. Sauce or […]

How early in pregnancy does your stomach get hard? During the early stages of pregnancy, around 7 or 8 weeks, the growth of the uterus and the development of the baby, turn the the belly harder. What’s the most critical time of a pregnancy? The first trimester is the most critical time in your pregnancy. […]

Is a LDR analogue or digital? The sensor that can be used to detect light is an LDR. Since the LDR gives out an analog voltage, it is connected to the analog input pin on the Arduino. The Arduino, with its built-in ADC (analog-to-digital converter), then converts the analog voltage (from 0-5V) into a digital […]

How do you say it is very important? Terms in this set (7) paramount. more important than anything else; supreme. essential. absolutely necessary; extremely important. vital. absolutely necessary or important; essential. critical. of the ​greatest ​importance to the way things might ​happen: imperative. fundamental. at the end of the day. Who is a very important […]