Category: Physics

Which type battery is best? Lithium-ion batteries What kind of batteries are least expensive? The most economical Li-ion battery in terms of cost-to-energy ratio is the cylindrical 18650 cell. Where is the cheapest place to buy batteries? For the best overall prices, consider shopping at one of these top five places to buy cheap batteries: […]

How do rockets rotate? In flight, any rocket will rotate about its center of gravity, a point which is the average location of the mass of the rocket. Most rockets are symmetric about a line from the tip of the nose to the center of the nozzle exit. We will call this line the roll […]

How does physics help us in our daily lives? Physics generates fundamental knowledge needed for the future technological advances that will continue to drive the economic engines of the world. Physics contributes to the technological infrastructure and provides trained personnel needed to take advantage of scientific advances and discoveries. What is physics in everyday life […]

What is the direction of net force in circular motion? The final motion characteristic for an object undergoing uniform circular motion is the net force. The net force acting upon such an object is directed towards the center of the circle. The net force is said to be an inward or centripetal force. What is […]

Is it legal to brake check a tailgater? Yes it is illegal to brake check a tailgater. Causing an accident on purpose is illegal. Others have said that you can claim to have seen something dart into the road, but you have still caused an accident. Yes, tailgating is also illegal, but two wrongs do […]

Can plate tectonics be proven? What is the cause of plate tectonics? Although this has yet to be proven with certainty, most geologists and geophysicists agree that plate movement is caused by the convection (that is, heat transfer resulting from the movement of a heated fluid) of magma in Earth’s interior. What are the evidences […]

Is a galaxy close to the Milky Way moving away from us slowly or quickly? As we look out into the Universe, we see galaxies moving away from us faster and faster. The more distant a galaxy is, the more quickly it’s moving away. To understand why this is happening, go and get a balloon […]

What is the most efficient cycle for a steam power plant? The Rankine cycle is the ideal cycle for vapor power plants; it includes the following four reversible processes: 1-2: Isentropic compression Water enters the pump as state 1 as saturated liquid and is compressed isentropically to the operating pressure of the boiler. What are […]

What is the moral of the story of an hour? The moral of the story undermines the famous saying “the truth shall set you free”; Mrs. Mallard finds freedom in the false belief that her husband is dead, and dies when she faces the truth. What causes Mrs Mallard’s heart to fail at the end […]

How far can a load extend beyond your car? The load must not extend more than 1.275 metres either side from the centre line of the vehicle. The maximum width of the vehicle is 2.55m. If your load extends behind the back of your vehicle by more than 1m then you’ll need to attach a […]