The cross sectional area of an optical fibre is 6.3 x 10^-6 m^2 The intensity of the light entering the optical fibre is 3.2 x 10^7 W/m^2 Calculate the power of the light entering the optical fibre

who did more work a man walking 20km up a hill in 1 hour or a man bycicling 20km up the same hill in 30 minutes

A special triangular frame is being made for a piece of artwork. The the base of the triangular frame must be 90 cm. If the area of the triangular frame is 765 square cm, what is the height? a) Let h = the height of the triangle.

The forces acting on a falling leaf are

Two similar metal spheres, A and B, have charges of + 2.0 x10 - 6 coulomb and + 1.0 x10 - 6 coulomb, respectively, as shown in the diagram below. What is the charge on each sphere after the spheres make contact and are then separated?

Suppose the sun were to suddenly shrink in size but its mass remained the same. according to the law of conservation of angular momentum, what would happen?

Oxygen makes up the largest part of living cells at 65%. What is the percentage of the second-most abundant element in living cells?

Shivering to warm up illustrates which characteristic of life? A. adaptation to environment B. homeostasis C. getting energy D. growth

Dante pours hot tea into a mug that is cool to the touch. Which best explains what will happen now?

What type of resource can be regenerated or replenished by biochemicl cycles

How much work is done lifting a 12-m chain that is initially coiled on the ground and has a density 2 kg/m so that its top end is 11 m above the ground? (Assume that acceleration due to gravity is g = 9.8 m/s2.)