Category: Physics

How do you know if valves are good? Testing for Leaky Valves Attach the rubber hose of a vacuum gauge to the intake manifold. Turn the engine on and have an assistant gradually depress the accelerator pedal to increase the speed of the engine. Observe the needle of the vacuum gauge. If the needle reads […]

What is the momentum of a 100 kg football player? Q: A football player has a mass of 100kg and is running 10m/s. What is his momentum? A: 100kg x 10m/s= 1000kg⋅m/s Page 8 Practice 1 1. Read this article on momentum. What is the velocity of an object that has a mass of 2.5 […]

Are sparklers thermite? The sticks of the sparklers are coated with a pyrotechnic composition known as ‘Thermite’, which is responsible to act as a fuel in the burning process. So yes, sparklers are thermite-positive. Thermite is basically a metal powder, which burns along with the oxidizer in the sparklers, to burn brightly. Why do sparklers […]

How are cactus adapted to survive in a desert? A cactus is able to survive in the desert due to the following features: (i) It has long roots that go deep inside the soil for absorbing water. (ii) Its leaves are in the form of spines to prevent water loss through transpiration. (iii) Its stem […]

What do Mercury Venus Earth and Mars have in common? The four planets closest to the sun—Mercury, Venus, Earth and Mars—are the inner planets, also called the terrestrial planets because they are similar to Earth. All of the inner planets are solid, dense, rocky planets. The inner planets either do not have moons or have […]

How should I pack for a bike tour? Clothing Bike Helmet. Cycling jersey. Cycling layers – windbreaker, rain jacket, sleeves, leggings, etc. ( weather dependent) Bike shorts (with small tube of chamois cream) Bike Shoes. Socks (wool or synthetic) Bike gloves. Sweat bands/caps/bandana. What is the best bike for Bikepacking? Gravel roads, forest roads and […]

Why do planes stop before taking off? A: Most planes use a long runway before takeoff to gain enough speed for the plane to lift up into the air. Most airplanes can take off only if they are moving fast enough. The force of lift needs to be stronger than the force of weight. Why […]

Can we see Hubble from Earth? Hubble is best seen from areas of the Earth that are between the latitudes of 28.5 degrees north and 28.5 degrees south. In contrast, the ISS passes over much more of the Earth because its orbit has a higher inclination at 51.6 degrees. What are the three types of […]

How do isotopes behave differently? Having different numbers of neutrons in the nucleus will not affect the charge of the atom. Instead, different isotopes have different mass and have different tendencies to radioactively decay. Different isotopes behave basically the same way chemically, because chemistry is determined by the electric charge. Do isotopes behave the same […]

Why is burning a candle an exothermic reaction? A candle flame is an exothermic reaction because when the candle burns it gives off heat rather than taking it in which would be endothermic. When Endothermic reactions absorb energy , a temperature drop is measured during the reaction. Should you pour out melted candle wax? Should […]