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A horizontal board weighing 205.0 N is supported at points A and B in the figure below. The plank servesas a platform for a painter, who weighs 604.5 N. Find the maximum distance D, suchthat the plank will not tip, no matter where the painter stands.(Let L = 4.20 m.)
When two identical ions are separated by a distance of 8.3×10?10m , the electrostatic force each exerts on the other is 5.4×10?9N How many electrons are missing from each ion
Consider a pair of charged parallel plates, each having an area of 5cm^2. what is the magnitude of the electric field in the space
after completing the calculations below sketch the ph curve for the titration of 25.0 ml of 0.200m solution of a weak
A horizontal 810-N merry-go-round of radius 1.30 m is started from rest by a constant horizontal force of 45 N applied tangentially to the merry-go-round
q. two perpendicular long straight wires both of which lie in the plane of the paper. the current in each of the wires
A neutral pie-meson is particle that can be created by accelerator beams. If one such particle lives 1.40 x 10^16 s as measured in the laboratory, what is its velocity relative to the laboratory
Suppose 47.5 cm of wire is experiencing a magnetic force of 0.7 N. What is the angle in degrees between the wire and the 1.25 T field if it is carrying a 6.5 A current
if the airplane somehow continues to fly as if nothing happend, where is the engine relative to airplane at the moment the engine hits the ground.
A 50 gram ball enters a a pendulum with mass 200 g. The pair then swings up to a height of 12 cm. Find the velocity at which the pair move immediately after the collision
A spherical ball with a radius of 2.130×10-1 m is completely submerged in a fluid that has a density of 1.023×103 kg/m3. What is the buoyant force acting on the ball
Block A with mass 4 kg travels with speed vi=3 m/s on a smooth horizontal surface and collides with a stationary block B whose mass is 4 kg. How much kinetic energy was lost in the collision
A 18 g rifle bullet traveling 230 m/s buries itself in a 3.6 kg pendulum hanging on a 2.8 m long string, evaluate the horizontal component of the pendulum's displacement
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