can you please give me this all ans
Answers
1)Magnetic forces are non contact forces due to simple reason, they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter. Magnetic forces are non contact forces; they pull or push on objects without touching them.
2)The special shape given to the bodies moving in the fluids like ships in water and aeroplanes in the air to reduce the fluid friction is called streamlined shape. Best Answer: Airplanes are streamlined so that they experience less friction with the air around them as they fly.
3)Baggage or luggage consists of bags, cases, and containers which hold a traveller's articles while the traveler is in transit. [1]
The modern traveller can be expected to have packages containing clothing, toiletries, small possessions, trip necessities, and on the return-trip, souvenirs. For some people, luggage and the style thereof is representative of the owner's wealth.
Baggage (not luggage),[2] or baggage train, can also refer to the train of people and goods, both military and of a personal nature, which commonly followed pre-modern armies on campaign.
4)When it rains, the water on a road causes a loss of friction. As tires move over a wet surface, the water fills in the tiny pits in the road surface, effectively smoothing out the surface. As a result, the normal heat and friction created is decreased, leading to a surface that is more slippery than when dry.
6)a sharp knife cuts better because it catches less friction on a sharp edge than it would on a blunt one. it makes it glide through faster, with less resistance caused by the force of friction. Because a sharp knife can cut vegetable easily. ... The utility knife is smaller, but usually longer than a paring knife.
5)The dam. You can see from the diagram that the dam is much thicker at the bottom than it is at the top. This is because the pressure of the water is much greater deeper down and the dam needs to be thick at the bottom so that it is strong enough to withstand this larger pressure.
7)Therefore the wider the straps the lesser the pressure. Because the surface area increases and so as we know that area is inversely proportional to the pressure so the pressure decreases and we find it easy to carry our school bag. Larger the area smaller the pressure
8)nails are thin or pointed at the end so that the area of contact force become very less increasing the pressure because pressure is inversely proportional to the area. hence with this relation the nail will easily penetrate
9)The pressure at higher altitudes is comparatively less, so to equalize the pressure difference ink starts moving out from the pen which has a relatively high pressure. Same applies to tooth paste as well as bleeding from nose at such altitudes. ... thus, the air with in the tube exerts pressure and forces the ink out
10) Porters wear turbans on their head when they have to carry heavy loads to increase the area of contact. And as we know that when area increses, pressure decreases. So, when porters wear turban the area of contact increases, and thus reduces the pressure considerably.