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A fisherman notices that his boat is moving up and down periodically due to waves on the water. It takes a time of t = 2.1 s for the boat to travel from its highest point to its lowest, a total distance of d = 0.91 m. The fisherman sees that the wave crests are spaced a horizontal distance of L = 6.30 m apart. What is the velocity of the wave?
Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a system of tiny tubes, called tracheae, find the oxygen concentration at the interior end of the tube
In a particluar x-ray tube, an electron approaches the target moving at 1.95 ? 108 m/s. compute the final speed of the electron
The electric potential at a position located a distance of 21.6 mm from a positive point charge of 8.70×10-9C, estimate the value of the second charge
A beam of neutrons that all have the same energy scatters from the atoms that have a spacing of 9.30×10^?2nm in the surface plane of a crystal
A 62 kg person on skis starts from rest down a hill sloped at 40° from the horizontal. The coefficient of friction between the skis and the snow is 0.10.
Light inside an optical fiber tube hits the wall between the tube and air and is totally internally reflected. what is the index of refraction of the tube
A cart of mass M = 1.2 kg can roll without friction on a level track. A light string draped over a light, frictionless pulley connects the cart to a hanger with mass m = 0.5 kg. The cart is released from rest, allowing it to roll, pulled by falling h..
A uniform rod of mass 3.05×10?2kg and length 0.410mrotates in a horizontal plane about a fixed axis through its center and perpendicular to the rod. What is the angular speed of the rod after the rings leave it
As in the previous problem (43), a solid block is suspended from a spring scale. If the reading on the scale when the block is completely immersed in water is 25.0 N, what are the block's volume and density
Two plane mirrors stand facing each other, 2.79 m apart, and a woman stands between them. What is the position of the third closest image
When subject to a steady acceleration of 0.800 g, the object must be located 0.600cm from its equilibrium position. Find the force constant required for the spring.
A camera flashtube requires 8J of energy per flash. The flash duration is 2m/ss}. What power does the flashtube use while it's flashing?
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