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A sled at rest on a flat, nearly frictionless surface is suddenly pushed with a force of 40.2N. If the sled has a mass of 20.6kg and the push lasts for 5 seconds, what is the sled's final momentum?
Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 23cm apart. What is the wavelength of the sound
By what factor must the mass of the ice be increased if the system is to have the same final temperature?
A 500g rock on a 80 cm long string is swung in a vertical circle 300 cm above the ground. What is the speed of the ball at this point
a projectile is shot from the edge of a cliff 115m above the ground level with a inital speed of 65.0m/s at an angle of 35 degrees
Two spheres with uniform surface charge density, first with a radius of 7.5cm and the second with a radius of 4.5cm , What is the surface charge density on the second sphere
An engine inlet decelerates the flow from M = 0.82 to M = 0.34 at the 3.5-ft diameter compressor face. What diameter should the inlet be
If s is measured in feet, the value of a is 3? How many seconds do you have to get out of the way of a chandelier wich falls from a 400 foot ceiling
A 34-kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, How high does she rise during this interval
An asteroid is in a nearly circular orbit of radius 5.219 AU about the Sun. Determine the period of this asteroid
The concept of thermionic emission is the basis of modern X-ray tubes, which are the workhorse of a medical X-ray image. How many electrons, ne, has the filament lost
Two particles with Q1 = 50 µC and Q2 = 79 µC are initially separated by a distance of 2.4 m, What is the change in the electric potential energy
q1. a lightbulb emits a spherical wave. if the intensity of the emitted light is 1.2 wm2 at a distance of 2.5 m from
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