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A driver makes an emergency stop and inadvertently locks up the brakes of the car, which skids to a stop on dry concrete. Consider the effect of rain on this scenario. If the coefficients of kinetic friction for rubber on dry and wet concrete are μK(dry) = 0.85 and μK(wet) = 0.50, find how much farther would the car skid (expressed in percentage of the dry-weather skid) if the concrete were instead wet?
A person notices a mild electric shock if the current along a path through the thumb and the index finger exceeds 80.0, Calculate the maximum allowable voltage with a wet-skin resistance of 1920
Consider hydrogen atom in the ground state. Determine, in electron volts, the total energy. Decide, in electron volts, the potential energy.
A soccer ball lying on the ground is kicked with an initial velocity of 10.0 m/s at an angle of 37 degrees above the horizontal
A toy car runs off a table and lands 3 metersaway from the edge of the table. If the table is 0.8 metershigh, Calculate the time of flight of the toy car
Using the Bohr model, calculate the speed of the electron in a hydrogen atom in the n=1,2, and 3 levels. Calculate the orbital period in each of these levels
The speed of the tip of the minute hand on a town clock is.00103m/s. What is the speed of the tip of the second hand on thesame length? What is the centripetal acceleration of the tip of the second hand?
A force vector has a magnitude of 594 newtons and points at an angle 37o of below the positive x axis. What are (1) the x scalar component and (2) the y scalar component of the vector.
A cylindrical brass rod (cross-sectional area = 1.3 x10-5 m2) hangs vertically straight down froma ceiling. By how many degrees must the temperature be lowered
A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of -7.50 µC. Find the magnitude and direction of the electric field at O, the center of the semicircle. EO = N/C.
Two bumper cars collide head on. Before the collision, car 1 is coming from the right at 3m/s and has a total mass of 200kg. Car 2 is coming from the left at 5m/s and has a total mass 250kg (the driver of car 2 is a lot fatter than the driver of c..
a block-spring system oscillates with an amplitude of 3.40 cm. the spring constant is 250 nm and the mass of the block
find magnitudes of the tension forces in the first two ropes. what is the velocity of the cart when it reaches its greatest y coordinate.
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