Category: Physics

Why are electric trains better than diesel? Powering trains with electricity rather than diesel has several other benefits, according to the authors of Solutionary Rail: The cost of electric locomotive engines is about 20 percent less than diesel locomotive engines on the global market, and maintenance costs are 25-35 percent less than for diesel engines. […]

Does a falling object have negative acceleration? The acceleration due to gravity is ALWAYS negative. Any object affected only by gravity (a projectile or an object in free fall) has an acceleration of -9.81 m/s2, regardless of the direction. The acceleration is negative when going down because it is moving in the negative direction, down. […]

How do I reduce static? More videos on YouTube Buy a Humidifier. Treat Your Carpets. Rub Dryer Sheets Over Your Upholstery. Stay Moisturized. Wear Low-Static Fabrics & Shoes. Add Baking Soda to Your Laundry. How do you get rid of static cling fast? Static cling can be a frustrating annoyance, but it’s easy enough to […]

How do you prove motion is simple harmonic? By definition, if a mass m is under SHM its acceleration is directly proportional to displacement. These equations demonstrate that the simple harmonic motion is isochronous (the period and frequency are independent of the amplitude and the initial phase of the motion). Is every oscillatory motion is […]

What is the dimensional formula for work? Or, W = [M1 L1 T-2] × [M0 L1 T0] = [M1 L2 T-2]. Therefore, work is dimensionally represented as [M1 L2 T-2]. What do you call the rate of doing work? In physics, power is the rate of doing work. It is the amount of energy consumed […]

Why do they say love in tennis? At the beginning of the game, when both sides have no score, the game is love-love because in tennis, love means having a score of zero or nil. Others theorize that love arose from the French word for “egg,” l’oeuf, because a zero on a scoreboard resembles an […]

Can uses and examples? “Can” is one of the most commonly used modal verbs in English. It can be used to express ability or opportunity, to request or offer permission, and to show possibility or impossibility….Can Exercises. Modal Exercise 1 can, could, have to, must, might and should Modal Verb Final Test complete review Can […]

Is the sky 7 layers? The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth’s surface is called the exosphere. What is the air made of on Earth? nitrogen Is Air One a substance? Air is not […]

What is a multiple answer question? Multiple Answer questions allow students to choose more than one answer. Use this type of question when more than one answer is correct. For example, in the medical field, ask students to select symptoms associated with a medical condition. Can multiple choice questions have more than one answer? Notice […]

Is a volleyball harder than a soccer ball? A volleyball is required to have an inside pressure of 300 to 325 g/cm2 (4.26 to 4.61 psi) (294.3 to 318.82 mbar or hPa). As you can see, this difference in pressure will mean a volleyball is much softer than a soccer ball, as I’m sure you’ve […]