A 2.0-kg block slides along a rough horizontal surface. A force(P=6.0N) is applied to the block at a 30degree angle. The magnitude of the block’s accerleration is 1.2 m/s^2. What is the magnitude of the force of friction acting on the block?

HRW6 Sup 28-84: Given = 21.2 V and R = 689 , what current does the ammeter in Fig. 28-69 read? Assume that it has zero resistance and that the battery is ideal. A

A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof a time of 1.16s later. You may ignore air resistance. a)If the height of the building is 19.1 m , what must

One of the Niagara turbines uses 172,000 cubic feet of water perminute under a head of 215 ft. What is the horsepowerdeveloped?

Solve part B only research, part A is just posted in to help give some context for part B.

1. A 2.0 kg ball is attached to a vertical post with two strings, one 2 m long and the other 1 m long. If the ball is set whirling in a horizantal circle, what is the minimum speed necessary for the lower string to

A circuit employs a silicon solar cell to detect flashes of light lasting 0.25 . The smallest current the circuit can detect reliably is 0.37 .

a sealed 51 m^3 is filled with 8000 moles of ideal oxygen gas (diatomic) at an initial temprature of 270 k the gas is heated to final temp of 370 k. the atomic mass of oxygen is 16g/mol. the mass density of the oxygen gas

research give exact answers.

How many water molecules are there in a 8.00L bottle of water? The molar mass of water is 18 g/mol.