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A wildlife biologist tracks an elk over flat terrain by following the emissions from a radio collar worn by the animal. If the elk travels 3.0km at an angle of 30 degrees East of North, followed by 2.0km at 40degrees West of North, and finally a 4.0km displacement 20 degrees South of West. Find the magnitude and direction of the resultant displacement
The brass bar and the aluminum bar in the drawing are each attached to an immovable wall. At 22.0 °C the air gap between the rods is 1.99 x 10-3 m
Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.42 T. When viewed edge-on, Determine the area of the first surface
At one instant a bicyclist is 43 m due east of a park's flagpole, going due south with a speed of 12 m/s. Then 22 s later, the cyclist is 43 m due north of the flagpole, going due east with a speed of 12 m/s.
He-Ne lasers are often used in physics demonstrations. They produce light of wavelength 633nm, What is the average energy density in the laser beam
A Styrofoam bucket of negligible mass contains 1.75 of water and 0.450 of ice. More ice, from a refrigerator at -14.0, is added to the mixture in the bucket, what mass of ice was added
The picture below represents the crests of water waves spreading out from a periodic disturbance in a pond. The phase difference (in degrees) between points A and E is
Water is flowing in a cylindrical pipe of varying circular cross-sectional area, and at all points the water completely fills the pipe. What is the radius of the pipe at this point
A charge Q1 = 1.33 %u03BCC is at rest and is located 2.30 cm away from another fixed charge Q2 = 1.95 %u03BCC. Calculate the kinetic energy of charge Q1
how to Calculate the acceleration of the system. Assume the magnitude of the acceleration is the same during starting and stopping.
A man ties one end of a strong rope 7.64 m long to the bumper of his truck, 0.505 m from the ground, and the other end to a vertical tree trunk at a height of 3.90 m. Compute the magnitude of the torque on the tree
A light string is wrapped around a 0.160-kg hollow 0.080-m-radius hoop. The hoop is released from rest and the fee end of the string is held in place. What is tension in the string while the hoop falls
Two small identical conducting spheres are placed with their centers 0.70 m apart. One is given a charge of 1.2 x 10^-8 C, Find the electrostatic force exerted on one sphere by the other
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