Category: Physics

Why does stored energy increase as separation increases? If the capacitor is now disconnected, and its capacitance is changed by increasing the distance between the plates, its energy must increase since work is being done by moving charge under the influence of an electrical field. Why capacitance does not depend on voltage? 1 Answer. In […]

Is water made of pee? Urine is about 95% water. It is not completely sterile of microorganisms, as many sources incorrectly state. But it doesn’t contain any of the harmful microbes that can make you immediately sick—such as those you might ingest from contaminated wilderness water, and which are generally transferred through feces instead. Do […]

What are the basic parts of a simple electric motor? A simple motor has the following parts: A power supply – mostly DC for a simple motor. Field Magnet – could be a permanent magnet or an electromagnet. An Armature or rotor. Commutator. Brushes. Axle. Are electric motors used today? They operate using principles of […]

What is the weight of a 30 kg mass? Fw = 30 kg * 9.8 m/s^2 = 294 N. To change from weight to mass divide by gravity (9.8 m/s^2). What is the weight of an object on Moon if its mass on Earth is 30 kg? If it were taken to the moon, it […]

Is there refraction in mirrors? In general when light strikes a surface, it can be transmitted, reflected, or absorbed. However, many mirrors are a piece of glass with a reflective coating on the back surface. So light can be refracted on the front surface, reflected from the back surface, and refracted again on the way […]

Can you use AA batteries instead of D? Electrically, one AA could do this job since it runs at the same voltage as a D battery. However, it was easier to combine 4 AA’s into one battery to simulate the size of a D battery and effectively replace it. What does AA battery look like? […]

What are the three factors that affect the formation of reflection? Answer. Factors that affecting the reflection of light are : The angle of refraction, the angle at which the light strikes the surface, and material that the light is hitting. What is Laws of reflection? The law of reflection states that the angle of […]

How do you calculate similar triangles? Calculating the Lengths of Corresponding Sides Step 1: Find the ratio. We know all the sides in Triangle R, and. We know the side 6.4 in Triangle S. Step 2: Use the ratio. a faces the angle with one arc as does the side of length 7 in triangle […]

What is the ideal following distance? The rule of thumb is to maintain at least a three-second following distance, giving you time to react and avoid potentially dangerous situations. You can calculate this by using a fixed object, such as a pole or an overpass to determine how far in front of you the car […]

What are the similarities and differences between arteries and veins? Arteries are blood vessels responsible for carrying oxygen-rich blood away from the heart to the body. Veins are blood vessels that carry blood low in oxygen from the body back to the heart for reoxygenation. Arteries and veins are two of the body’s main type […]