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Michael Phelps needs to swim at an average speed of 2.00 m/s in order to set a new world record in the 200 m freestyle. If he swims the first 100 meters at an average speed of 1.80 m/s how fast must he swim the second 100 meters in order to break the record?
A horse runs a distance of miles around an oval track in 2.0 minutes and 6.0 seconds. If the horse starts and finishes at the same location on the track, what is the horse's average velocity for the race?
a uniform solid sphere of radius 0.491 m and mass 14.0 kg turns counterclockwise about a vertical axis through its
Two particles are fixed on x-axis. Particle 1 of charge q1 = -2×10^-7 C at x = 20 cm and particle 2 of charge q2 = +8×10^-7 C at x = 70 cm. At what x coordinate on the axis is net electric field produced by the particles equal to zero.
In its own reference frame, a box has the shape of a cube 2.5mon a side. This box is loaded onto the flat floor of a spaceship, What is the volume of the box as we observe it
Light moving from glass to air changes wavelength from 448.5 nm to 653.7 nm. find the frequency of the light in air
Decide the magnitude of the electric field at a point midway among a -8.0C and a 8.6C charge 8.0 cm apart. Suppose no other charges are nearby.
Find out the precession period of the axis
A star of mass 2.0 1028 kg that is 4.6 x 1020 m from the center of a galaxyrevolves around that center once every 4.6 x 108 years. estimate the number of stars in the galaxy
a) Write the correct energy equation, i.e. in the form of how changes in energy relate to each other. b) Calculate the speed requested above.
an automobile tire has a volume of 1.64 x 10-2 m3 and contains air at a gauge pressure pressure above atmospheric
75-kg person stands on a 6.0-m-long 47-kg ladder. The ladder is tilted 60° above the horizontal. The coefficient of friction between the floor and the ladder is 0.42. The coefficient of friction between the wall and the ladder is zero.What dis..
Light of wavelength 500 nanometer is incident on a thin sheet of plastic film (n= 1.50) in air. Determine the thinnest the sheet can be so that the reflected light from the surfaces undergoes constructive interference
You've made the finals of the Science Olympics! As one of your tasks, you're given 1.1g of copper and asked to make a cylindrical wire, What length will you choose for your wire
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