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Two cars are headed right at each other. The car heading east started from rest and has an acceleration of 3.8 m/s/s. The car is moving west at a steady 19 m/s. If the cars are initially 120 m apart, how long will it take before they collide?
A Carnot engine does work of 150 J per cycle. The engine operates between two reservoirs at 20 degree C and 500 degree C. How much energy is lost per cycle in its exhaust
The coefficient of static friction between the tires of amotorcycle and the road is 0.56. what is the radius of the tightest unbanked turn that the driver can hope to handle
The suspension cables on the Brooklyn Bridge are 15.75 in. diameter wire ropes. Estimate the total drag force on one of the cables in a 40 mph wind if the length of one cable is about 3000 ft and the air temperature is 70o F.
Two converging lenses, each of focal length 14.2 cm, are placed 59.9 cm apart, and an object is placed 26.6 cm in front of the first. determine the magnification of the system
q1. every day our earth receives 1.55times1022 j energy from the sun. if we were able to use 0.85 percent of this
q1. a fan at a rock concert is 30 m from the stage where sound intensity level is 110 db. her eardrums have the
The middle C string on a piano is under a tension of 944N. The period and wavelength of a wave on this string are 3.82 ms, calculate the linear density of the string
A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. How far apart will the two packages land on the ground
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the student-stool system is 3.5 kg*m^2. Calculate the initial and final kinetic energy of the system
The drawing shows two situations in which charges are placed on the x and y axes. They are all located at the same distance of 6.1 cmfrom the origin O. For each of the situations in the drawing, determine the magnitude of the net electric field at..
a meter stick balances at the 50.0-cm mark. if a mass of 50.0 g is placed at the 90.0-cm mark the stick balances at the
A fire hose 4.19 cm in diameter is capable of spraying water at a velocity of 16.3 m/s. what horizontal force should a fireman exert on the hose to keep it stationary
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