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A bird watcher meanders during the woods, walking 0.50 km due east, 0.75 km due south, and 2.15 km in the direction 35.0° north of west. The time needed for this trip is 2.50 h. decided the magnitude and direction (relative to due west) of the bird watcher’s displacement and average velocity. Use kilometres and hours for distance and time, respectively.
a weightlifter curls a 35kg bar raising it each time a distance of 0.65m. how many times must he repeat this exercise
a proton is released in a uniform electric field and it experiences an electric force of 8.65times10-14n toward the
Two steel guitar strings have the samelength. String A has a diameter of 0.50mm and is under 440.0 N oftension. Find the ratio of the wave speeds, Va/Vb, in these twostrings
Starting from rest, a 12 centimeter diameter compact disk takes 2.6 second to reach its operating angular velocity of 1915 rpm. Find how much torque is applied to the disk
why to Assume charge 1 is located at the origin of x axis. A ball is thrown directly downward with an initial speed of 8.70 m/s, from a height of 30.6 m. After what time interval does it strike the ground.
Object A with mass 9*mo is moving in positive x direction at speed of 0.8c. Object B with mass 1.2*mo is moving toward negative x direction with speed of 0.6c, Find the kinetic energy of the system before and after the collision
A horizontal force does 50 J of work on a box, while the kinetic friction force, between the box and the floor, What is the cange inn the box's kinetic energy
A 3.00-m-long, 400 kg steel beam extends horizontally from the point where it has been bolted to framework of a new building under construction. A 74 kg construction worker stands at the far end of the beam.What is the magnitude of the torque abo..
The four heating elements on an electric stove are wired inparallel so that any combination of them can be on at the sametime. When an element is on, it behaves as a6.80 Ω resistor. When all of the heatingelements are on, what is the equivalent re..
A 0.058 kg aluminum bullet traveling at 481 m/s strikes an armor plate and comes to a stop. what is the bullet's temperature change in degrees Celsius
two charges are placed between the plates of a parallel plate capacitor. one charge is q1 and the other is q2 4.90
The position of a 250g object is given (in meters) by x=5.0t^3 -8.0t^2 -44t , where t is in seconds. Determine the net rate of work done on this object
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