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what is the meaning of a ground speed? Justify why the ground speed is different from air speed. Will there ever be conditions under which the ground speed and the air speed be the same. Explain.
The current supplied by a battery in a portable device is typically 0.131 A. Find the number of electrons passing through the device
A farm tractor tows a 4830 kg trailer up a 15.5° incline at a steady speed of 2.0 m/s. What force does the tractor exert on the trailer
Two waves are traveling in the same direction along a stretched string. The waves are 45.0° out of phase. Find the amplitude of the resultant wave
The planet Neptune has a satellite, Proteus, which travels in an orbit 1.180*10^8 m with a period of 1.12 days. Calculate the mass of Neptune from this information
An RL series circuit has R = 80.0? and L = 1.95mH . The series combination is connected across a 165V (rms), 63Hz power supply. Find the peak current
A 1530 kg car is travelling with the speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to the halt in a distance of 40.00 m.
Young's double slit experiment arrives at a point on the screen one-half wavelength behind the wave from the other slit, which is observed at that point?
Reaction time is the shortest time interval elapsed after the driver of a car decides to apply the break. (For example, the time wasted immediately after the driver sees a child standing on the road). Will the driver be able to stop in time
A car with a total mass of 1.43 103 kg has wheels of radius 29.0 cm and moment of inertia 0.885 kg · m2. Find the car's rotational energy when the car is moving at a speed of 22.0 m/s
Three boats exert forces on a mooring hook. The first pulls 420 N at 60 degrees from the East. ind the resultant direction of force of the combination of these three forces
A proton is projected in the positive x direction into a region of uniform electric field E = -5.50 105 i N/C at t = 0. Determine the time interval over which the proton comes to rest
An 66 kg man on ice skates is pushing his 33 kg son, also on skates, with a force of 125 N. What force is exerted by the boy on his father
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