How do you know seafloor spreading? Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle’s convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. What is the oldest seafloor? […]
Do geese sleep while flying?
Do geese sleep while flying? Now, however, according to a new study from the Max Planck Institute for Ornithology, researchers have finally found evidence that birds do indeed sleep while flying. Why do birds fly in circles at sunset? Why do flocks of birds fly in a circle over the same place over and over […]
Which of the following action best describes conserving water?
Which of the following action best describes conserving water? Water is best conserved if it is used judiciously. What is the most appropriate use for graywater? Greywater is suitable for irrigating lawns, trees, ornamentals, and food crops. Is laundry water GREY water? Greywater is the waste water from showers, baths, spas, handbasins, laundry tubs, washing […]
What are the two major types of roller coasters?
Why is Feb only 28 days?
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 […]
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 […]