Category: Physics

What is the change in velocity per time? The rate of change in the velocity of an object per unit time is referred as acceleration and the kind of motion is known as accelerated motion. The acceleration is positive when it is in the direction of velocity and negative when it is opposite to the […]

Is magnetic field inside a toroid zero? The magnetic field lines inside the toroid are concentric circles. The magnetic field is homogeneous inside the toroid and zero outside the toroid. We asses the direction of the magnetic B-field by the right-hand rule. Why is there no magnetic field outside a toroid? After applying Ampere’s Law, […]

What happens to the speed of a body when a force is applied? Answer. In the simplest case, a force applied to an object at rest causes it to accelerate in the direction of the force. The body might speed up, slow down or change direction, after which, the body will continue moving at a […]

How do they measure weight in England? Weight measurements in the UK, US, Australia and New Zealand In the US, they use pounds (lbs) for their weight while Australia and New Zealand use kilograms. So, a man weighing 90kg would give his weight as 198 lbs in the US and just over 14 stone in […]

Why is electricity so cheap in Iceland? This is one of the plants that enables Iceland to produce 100 per cent of its grid electricity from renewable sources. It’s all either geothermal or hydro. Electricity prices are low in Iceland, especially for the aluminum smelting industry. Can you drink the water in Iceland? Yes, it […]

Is it safe to breathe in ozone? When inhaled, ozone can damage the lungs. Relatively low amounts can cause chest pain, coughing, shortness of breath and throat irritation. Ozone may also worsen chronic respiratory diseases such as asthma and compromise the ability of the body to fight respiratory infections. Can ozone cure Lyme disease? Ozone […]

What is the force of a car crash? force equals mass times acceleration. In this case, the acceleration is (v – 0)/t, where t is whatever time it takes car A to come to a stop. The car exerts this force in the direction of the wall, but the wall, which is static and unbreakable, […]

Is a 5 cm tumor big? The smallest lesion that can be felt by hand is typically 1.5 to 2 centimeters (about 1/2 to 3/4 inch) in diameter. Sometimes tumors that are 5 centimeters (about 2 inches) — or even larger — can be found in the breast. What stage is a 5 cm tumor? […]

How do you write 21000 in scientific notation? Why is 21,000 written as 2.1 x 104 in scientific notation? How do you write 0.000345 in scientific notation? Convert from Real Number to Scientific Notation: 0.000345 = 3.45 x 10. Here we wish to write the number 0.000345 as a base times 10 raised to an […]

When you reach the top of your jump on a trampoline? Your kinetic energy is greatest, just before you hit the trampoline on the way down and when you leave the trampoline surface on the way up. Your kinetic energy is 0 when you reach the height of your jump and begin to descend and […]