Stone with a mass of 85 kg. is lifted upwards with a 2.5 m long bar. There is a smaller stone below the bar as a support point at a distance of 0.45 m from the end of the rock. Calculate how much force is needed to move the rock?

Hormones perform important functions within the reproductive system. during puberty, a number of changes occur in the body. which hormone is responsible for the development of these characteristics in the female? estrogen progestin progesterone testosterone

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earn $75 in interest.how much interest will she earn during the following year?

Awindow has the shape of a rectangle with a semi circle at the top. find the approximate area of the window using the dimensions shown. 4ft by 8ft