A builder will place floor in a house. The total area of the house is 245m^2 and the floor selected comes in pieces of 20m wide and 30cm long. A) How many pieces of floor are needed?
B) If the floor is packed in boxes of 1.2m^2, how many boxes should he buy?
C) The floor is sold at $ 199.00 m^2. How much will he pay for the entire floor?

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.

How many neutrons does plutonium -196 with an atomic number of 78.

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?