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A uniform 5 kilogram ladder is leaning against a frictionless vertical wall, with which it makes a 15 degree angle. The coefficient of friction between ladder and ground is 0.26. Can a 65 kilogram person climb to the top of the ladder without it slipping? If not, determine how high can that person climb? If so, how massive a person would make the ladder slip?
Calcium carbonate, CaCo3, can be in two different solid phases, calcite or aragonite. Which phase is more stable at room temp? At what pressure are both phases stable?
The car and minivan collide and stick together. Suppose the direction of the wreckage after the impact is 42.0° above the x axis.
Estimate the buoyant force that air exerts on you. (To do this, you can estimate your volume by knowing your weight and by assuming that your weight density is a bit less than that of water.)
A football is kicked straight up into the air; it hits the ground 3.4 later. With what speed did it leave the kicker's foot
For comparison, what is the magnitude of the acceleration a test tube would experience if dropped from a height of 1.0 m and stopped in a 2.0-ms-long encounter with a hard floor
While two forces act on it, a particle is to move at the constant velocity v = (3m/s)i - (4 m/s)j. One of the forces is FA = (4 N)i + (- 9 N)j. Find what is the other force
A 1600 kg car drives around a flat 210m -diameter circular track at 25m/s. What is the magnitude of the net force on the car
The driver of a truck slams on thebrakes when he sees a tree blocking the road. With what speed does the truck then strike the tree
A lamp (R = 151 ohms ), an electric heater (R = 24 ohms ), and a fan (R = 50 ohms ) are connected in parallel across a 119 V line. What power is expended in the heater
A large steam pipe is covered with 1.7-cm-thick insulating material of thermal conductivity 0.31 J/(s m °C). How much energy is lost every second when the steam is at 185 °C
A point charge of -4.00nC is at the origin, and a second point charge of 6.00nC is on the x axis at x=0.800m. Discover the magnitude and direction of the electric field at each of the following points on the x axis: a) x=20.0cm, b) x=1.20m, c) x= -20..
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. What is the mass of the unknown element
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