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A river is 175 meters wide and has a current that is flowing at 4 meters/second from the north to the south. A swimmer tries to cross the river at a velocity of 9 meters/second.
What velocity and heading will the swimmer have to use to get 50 meters upstream from directly across the river in 19.4 seconds?
A -kg box is being lifted by means of a light rope that is threaded through a single, light, frictionless pulley that is attached to the ceiling, what average power is delivered by the person pulling on the rope
A fathom is a method for measuring lengths, usually reserved for measuring the depth of water. what is the distance in fathoms
a person exerts force of 35n on the end of an door 88 cm wide, what is the magnitude of torque if the force is exerted perpendicular to the door
Two carts collide in a perfectly elastic collision. Cart A has a mass of 0.5 kg and an initial velocity of 0.19 m/s. What is the final speed of each cart
A 2.50 x 10^-6 F capacitor is charged to 754V and a 6.80 x 10^-6 F capacitor is charged to 563V, Determine the potential difference across the second capacitor
The figure shows two charged particles on an xaxis: -q = -6.40 ×10-19 C at x =-4.00 m and q = 6.40 ×10-19 C at x =4.00 m. What are the (a)x-and (b)y- components of the netelectric field produced atpoint P at y = 2.00 m?Different numbers than the book..
A 8500 kg boxcar traveling at 16.8 m/s strikes a second boxcar at rest. What is the mass of the second car
question an optical disk drive in your computer can spin a disk at up to 10000 rpm. if a particular disk is spun at
An 8-g bullet is fired into a 170 g block that is initially at rest at the edge of a table of 1m height. The bullet remains in the block, and after the impact the block lands d = 2.10 m from the bottom of the table. Determine out the initial speed..
The potential difference across a cell membrane from outside to inside is initially at -90 mV (when in its resting phase). How many ions move through the membrane
Which of the following statements are true about nuclear decays and radioactivity?
a flat sheet of crown glasshas a thickness of 2.2cm. it is on top of a flat sheet ofcrystalline quartz that has a
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