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Question1
A 93 kg lumberjack stands at one end of a 379 kg floating log. Both the log and the lumberjack are at rest firstly. If the lumberjack now trots toward the other end of the log with a speed of 2.7 m/s relative to the log, what is lumberjack's speed relative to the shore? Overlook friction between the log and the water.
Question2
A has a magnitude of 94.0 Newton's (N) and points due east. The force vector B has a magnitude of 131 N and points 77.0 ° north of east.
Find out the
(a) Magnitude and (b) direction of A - B. (Give the direction as a positive angle with respect to due east).
(c) Magnitude and (d) direction of B - A. (Give the direction as a positive angle with respect to due west).
A 24-V battery is connected in series with a resistor and an inductor, with R = 9.0 ? and L = 7.8 H, respectively, Find the energy stored in the inductor when the current reaches its maximum value
Calculate the ratio of heating loss in a given length of wire (assumed ohmic) carrying current at 530 kV to when it operates at 120 V
You roughly estimate that the roommate shines light rays on to the water at an angle of 52.1°. You know that air has an index of refraction of 1.0. Determine the index of refraction of the unknown liquid
Two Polaroids are aligned so that the light passing through them is a maximum. At what angle should one of them be placed so that the intensity is subsequently reduced by half?
A parallel capicitor is made of two plates with cross sectional area A which are separated by a distance d, what is the potential difference measured across the plates
In a hydraulic system with a large and a small piston, you wish to lift a 1130 kg car sitting on the large piston that has a diameter of 28.2 cm, What is the diameter of the small piston
Two high-current transmission lines carry currents of 25.0A and 75.0A in the same direction and are suspended parallel to each other 45.0cm apart. what magnetic force does each segment exert on the other
You are designing a testing machine for a golf ball manufacturer. What is the speed of the 0.050 kg golf ball just after being struck by the clubhead
An exhaust tube from a steam generator is submerged in a large container of cool water. what is the change of entropy (in J/deg) of the steam
An electric car accelerates for 8.0 s by drawing energy from its 345-V battery pack. During this time, Find the minimum horsepower rating of the car
A rocket is fired at 48m/s, in a direction 400 to the horizontal. It explodes in mid air, Find the speed of the rocket just before the explosion
the acceleration of gravity at the surface of moon is 1.6 m/s^2. A 5.0 kg stone thrown upward on moon reaches a height of 20m, find its intial velocity
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