The number corresponds with the number of gears [speeds]. Most child bikes may have three gears. Gears are especially helpful when biking up or down a hill. For most riders ten speeds are more than enough.
It's really not clear what you mean with this. With 10-speed I assume you have two chainwheels up front and five at the rear. Basically you get on it and ride. pick a gear that lets you turn the cranks at about 80-100 turns/minute. If you want to be slick you try to keep the chain as straight as possible, i.e. you don't run the chain on big-big or small-small.
he ride a yellow bike that hasten speed
25lbs.
Need to be a complete question to get an answer.
If by bike you mean bicycle then: Yes if you increase your speed or the intensity for that matter then your heart rate will also increase.
A tandem bicycle is a bike for two riders, one after the other, with a set of pedals for each. A 10-speed bike can be two different things. Either a bike with two chainrings by the pedals and five sprockets at the rear wheel, or if it's a newer bike, 10 sprockets at the rear.
There's really no telling, say between 18 - 30 lbs.
I'd suggest that you visit www.parktool.com, it's a really helpful site.
A cruiser bike is a bike that gives an upright riding postion, is usually blinged out, and is ridden rather sedately. MTBs are available in several different versions(XC, AM, DH), but basically they're about providing a compromise between ruggedness and rideability. Mountain bikes have much knobblier tires and usually have suspension, which is rarely available on cruisers. Mountain bikes are also used competitively.
a 10 speed racer is a dirt bike a 10 speed racer is a dirt bike
no
Really depends on what you mean by a "regular bike". But road bikes tend to be lighter, more slender and focused more on speed than everyday usefullness compared to a regular bike.
"Velo" is a slang term that stands for "velocity" or speed in English. It can refer to the speed of an object, person, or process.