Category: Physics

Can the resultant of 3 vectors be zero? Answer. Three vectors are coplanar which means all three vectors are in the same plane. If direction of resultant of those two vectors is exactly opposite to the direction of the third vector. If all above conditions are satisfied, then the resultant of three vectors will be […]

Is Pioneer 10 still transmitting? After more than 30 years, it appears the venerable Pioneer 10 spacecraft has sent its last signal to Earth. Pioneer’s last, very weak signal was received on Jan. 22, 2003. The last time a Pioneer 10 contact returned telemetry data was April 27, 2002. Is Voyager 1 dead? Voyager 1, […]

What is the process of an electromagnet? An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire wound into a coil. A current through the wire creates a magnetic field which is concentrated in the hole, denoting the center of the coil. […]

What happens when you exercise everyday? Regular physical activity can improve your muscle strength and boost your endurance. Exercise delivers oxygen and nutrients to your tissues and helps your cardiovascular system work more efficiently. And when your heart and lung health improve, you have more energy to tackle daily chores. Is it good to do […]

Is Macedonia considered Greek? Macedonia is the largest and second-most-populous Greek region, with a population of 2.38 million in 2017. Together with Thrace, and sometimes also Thessaly and Epirus, it is part of Northern Greece. Is Macedonia and North Macedonia the same? North Macedonia (Macedonia until February 2019), officially the Republic of North Macedonia, is […]

Does reading increase IQ? By adding to that storehouse, reading increases your crystallised intelligence. That explains why some IQ tests include vocabulary words, which generally serve as a reliable proxy of how clever you are. “Fluid intelligence” is that ability to solve problems, understand things and detect meaningful patterns. Is reading a sign of intelligence? […]

What is the relation between area and resistance? Resistance depends on an object’s size, shape, and material. In Figure 3 below, the cylinder’s resistance is directly proportional to its length l. The longer the cylinder, the higher the resistance. Additionally, the resistance is inversely proportional to the cross sectional area A. What happens to the […]

Where do unused calories go? When you eat more calories than you need, your body stores the extra calories as body fat. Even a fat-free food can have a lot of calories. Excess calories in any form can be stored as body fat. How many excess calories must you burn to lose one pound? You […]

Does anything have 100 efficiency? A system can never be 100% efficient. The reason behind this is because of heat and sound energy are lost in some amount in every system. No matter they are waste or not. So a system doesn’t exist, with 100% efficiency. Is human body energy efficient? Alas, our bodies are […]

Which is command center of the body? The brain and spinal cord are your body’s central nervous system. The brain is the command center for your body, and the spinal cord is the pathway for messages sent by the brain to the body and from the body to the brain. What is nervous weakness? Overview. […]