Why is Feb only 28 days? This is because of simple mathematical fact: the sum of any even amount (12 months) of odd numbers will always equal an even number—and he wanted the total to be odd. So Numa chose February, a month that would be host to Roman rituals honoring the dead, as the […]
Can an object move without force?
Can an object move without force? Acceleration is the change of velocity per unit time, so if there is no force, all we know is that the acceleration is zero. Therefore, the velocity is not changing. If the object was already moving, then it will just keep moving. So, yes, the object can be moving […]
What is the importance of mineral resources?
What is the importance of mineral resources? Their Importance: Essential for industrial and economic development of nations. Copper, tin & iron ore were essential to the ancient metal-using cultures of the Bronze & Iron Ages. What is the use of the following resources land? Land is used for various activities like obtaining natural resources such […]
Where I can ask questions and get answers?
Where I can ask questions and get answers? Herein find some best sites where you can ask questions and get answers from real people online. Answerbag. Yahoo! Answers. Blurt it. WikiAnswers. FunAdvice. Askville. Friendfeed. How do you ask Google a question? Ask a question On your computer, open Google. Search for a place. Under the […]
Why thick wires are used in transformer?
Why thick wires are used in transformer? When a transformer is in operation, there are ac currents in primary and secondary coils. This is the most important for the high current winding (the secondary coil of a step-down transformer). Thick copper wire is used for this winding, because thick wire of low resistivity has a […]
What has the highest air pressure?
What has the highest air pressure? 1083.8mb How much air pressure can a human survive? A person can withstand perhaps 100 atmospheres of pressure if they aren’t breathing air – divers do it. If they are breathing air, the limit is just a handful of atmospheres. Not sure exactly how many it takes before oxygen […]
What is the most common roll with two dice?
How is sound waves measured?
How is sound waves measured? Sound energy travels in waves and is measured in frequency and amplitude. Amplitude measures how forceful the wave is. Frequency is measured in the number of sound vibrations in one second. A healthy ear can hear sounds of very low frequency, 20 Hertz (or 20 cycles per second), to a […]
What is the difference between EMF and back EMF?
What is the difference between EMF and back EMF? The back emf is represented as a variable emf that opposes the emf driving the motor. Back emf is zero when the motor is not turning and increases proportionally to the motor’s angular velocity. The generator output of a motor is the difference between the supply […]