A 0.25 kg puck is initially stationary on an ice surface with negligible friction. At time t = 0, a horizontal force begins to move the puck. The force is given by F → = (12.0 − 3.00 t 2 ) i ^ , with F → in newtons and t in seconds, and it acts until its magnitude is zero, (a) What is the magnitude of the impulse on the puck from the force between t = 0.500 s and t = 1.25 s? (b) What is the change in momentum of the puck between t = 0 and the instant at which F = 0?
A 0.25 kg puck is initially stationary on an ice surface with negligible friction. At time t = 0, a horizontal force begins to move the puck. The force is given by F → = (12.0 − 3.00 t 2 ) i ^ , with F → in newtons and t in seconds, and it acts until its magnitude is zero, (a) What is the magnitude of the impulse on the puck from the force between t = 0.500 s and t = 1.25 s? (b) What is the change in momentum of the puck between t = 0 and the instant at which F = 0?
A 0.25 kg puck is initially stationary on an ice surface with negligible friction. At time t = 0, a horizontal force begins to move the puck. The force is given by
F
→
= (12.0 − 3.00t2)
i
^
, with
F
→
in newtons and t in seconds, and it acts until its magnitude is zero, (a) What is the magnitude of the impulse on the puck from the force between t = 0.500 s and t = 1.25 s? (b) What is the change in momentum of the puck between t = 0 and the instant at which F = 0?
Imagine you are out for a stroll on a sunny day when you encounter a lake. Unpolarized light from the sun is reflected off the lake into your eyes. However, you notice when you put on your vertically polarized sunglasses, the light reflected off the lake no longer reaches your eyes. What is the angle between the unpolarized light and the surface of the water, in degrees, measured from the horizontal? You may assume the index of refraction of air is nair=1 and the index of refraction of water is nwater=1.33 . Round your answer to three significant figures. Just enter the number, nothing else.
Applications and Investigations in Earth Science (9th Edition)
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