Doing a sit up with a weighted object held extended above your head or by holding a plank position at the top of the motion can increase the difficulty. Another challenging version is to perform sit ups on an unstable surface like a stability ball to engage more muscles for stabilization.
The hardest substance in a rock would be the hardest mineral of which the rock is composed.
The third hardest gemstone is ruby and then the fourth hardest is emerald.
Diamond is a the hardest mineral, so yes. Minerals are what make up rocks.
The hardest mineral is diamond, which has a hardness of 10 on the Mohs scale.
The strongest and hardest between marble, dolerite, clay, and siltstone is marble. It is considered to be a mineral that is very hard and strong. It can hold up better to the elements than the other three.
yes
After the revolution, Mollie has the hardest time adapting to the new way of life. It is very hard for her to give up her old lifestyle.
whichever way you want, it doesnt matter
The Hardest Way to Make an Easy Living was created on -20-11-10.
No
No, Diamond which is entirely made up of carbon is the hardest
Sit up straight, shoulders back, and legs crossed; hands in lap, too. (optional)
If you mean a sit-up as in the exercise, the plural is sit-ups.
nicotine.
beveled side up
Don't sit up.
by telling him to sit