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A river has a steady speed of 0.350 m/s. A student swims upstream a distance of 1.00 km and swims back to the starting point.
If the student can swim at a speed of 1.50 m/s in still water, how long does the trip take (swimming up and down in the current)?
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If the water were still, by how much would the trip be longer or shorter? (Give a negative answer for a shorter trip.)
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A head-butter can accelerate himself from rest to head-butting speed of 8.5 m/s, At the moment of impact, what impulse does the head butter produce
person walks 25.0° north of east for 3-km. How far would another person walk due north and due east to arrive at the equal location?
A car of mass 2200 kg collides with a truck of mass 4800 kg, and just after the collision the car and truck slide along, stuck together. find the velocity of the stuck-together car and truck just after the collision
aircraft has cross section of 710 m^2, what percentage of radiated energy will be detected
Lillian (mass 32.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 2.0 m/s. Evaluate what is the speed of Lillian and her dog after the catch?
A lens for a 35-mm camera has a focal length given by f = 40mm. What is the magnification of the image on the film
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An ion accelerated through a potential difference of 240.0 V has its potential energy decreased by potential energy of 7.68*10^-17 J
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You have a converging lens of focal length 20 -cm. For what range of object distances will the image be real
A laser used to weld detached retinas emits light with a wavelength of 654nm in pulses that are 20.2ms in duration. How much energy is in each pulse
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