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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
A light beam having a wavelength of 654 nm in air is directed into glycerine (n=1.47). What is the frequency of light in glycerine
Suppose you have two equal mass objects both on a gentle incline. One is a glider on an air track while the other is a ball on a straight slope. Explain what type of energy both objects have
If she is served 200 of coffee at 85 in a well-insulated container, how much ice at 0 must she add to obtain a final temperature of 33.
A model rocket with mass 1.62 kg starts from rest on the ground and accelerates upward with engine force 45.8 N. Find the work done by the rocket engine
A person pulls a toboggan for a distance of 39.7 m along the snow with a rope directed 33.0 ° above the snow. How much work is done on the toboggan by the tension force
During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between two fence posts. The limb exerts a downward force of 151 N on the wire. The left section of the wire makes an angle of..
A light bulb at point x in the frame of reference O blinks on and off at intervals, ?t = t2 - t1. Use the expressions for the Lorentz transformations to derive the expression for the time dilation relations ?t and ?t'
A car crashes into a wall at 25 m/s and its contents are brought to rest in 0.1s. display that the average force exerted on a 75-kg test dummy by the seat belt is more than 18,000 N.
A ferries wheel with radius 20 m which rotates counterclockwise, is just starting up. Find the magnitude of the passenger's acceleration at the instant
An object of mass m = 5.45kg is suspended from the ceiling of an accelerating truck by a string. What is the magnitude of the tension in the string
A package in an airplane moving horizontally at 275 m/s is dropped while the altitude is 766 meters. How far forward from the spot over which it was dropped does the package land.
Assuming no water resistance, a big fish is gliding through the water with momentum 2.0kg m/s. What was the final velocity of the big fish after the meal
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