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A homeowner is trying to move a stubborn rock from his yard which has a mass of 1.150 × 103 kg. By using a lever arm (a piece of wooden board) and a fulcrum (or pivot point) the homeowner will have a better chance of moving the rock. The homeowner places the fulcrum 0.288 m from the rock so that one end of the wooden board fits under the rock\'s center of weight. If the homeowner can apply a maximum force of 680.0 N at the other end of the board, what is the minimum total length of board required to move the rock?
L=(__________)m
A rocket is fired from the ground but at 30m it runs out of fuel, How fast is it going when it comes back down to earth
The electric field midway between two equal but opposite point charges is 878N/C , and the distance between the charges is 25.0cm. What is the magnitude of the charge on each (in C)?
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber, If a sample of gold with a mass of 2.477g, is pressed into a leaf of 4.116 ?m thickness, what is the area (in m2)..
An ideal gas is expanded isothermally from 20L to 30L. During thismethod , 6J of energy is expended by the external mechanism that expanded the gas. Which of the statements is correct.
Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass and radius of orbit. The satellites fire rockets that provide force needed to keep a circular orbit around the space stat..
A 1 kg ball is attached to a 2 m long piece of very light string and suspended in such a way that it can freely swing and it passes just above the ground.
An excited H atom the e- is in 4d. The atom is in an external magnetic field. What are the smallest and largest possible angles
A force vector has a magnitude of 595 newtons and points at an angle 39o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
A 2 meter wire carrying 0.9 A of current is at a 90 degree angle to a magnetic field. compute the strength of the field
A sealed container of volume 0.10 m^3 holds a sample of 3.0 x 10^24 atoms of helium gas in equilibrium, Calculate the temperature and pressure of the helium gas
In a simple atom, the electrons making transitions between outermost energy levels and the innermost energy levels give rise to photons with the reddest colours.
a swimming pool measures 10 meters wide by 50 meters long by 4 meters deep. what is the water pressure at this point
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