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A 2000kg tractor is pulling a trailer filled with corn down the road. The trailer has a single axle and is roughly 2m wide and 4m long. The trailer axle suddenly snaps and the wheels fall off the trailer. You notice that as the tractor drags the trailer, the tractor wheels are on the verge of starting to slip. If you estimate the coefficient of friction between the tractor and the road is 0.85 and the kinetic coefficients of friction between the trailer and road is 0.4. How much mass does the trailer have?
On the moon the surface temperature ranges from 397 K during the day to 92.0 K at night. What are these temperatures on the Fahrenheit scale
A charged sphere with 1×10^8 units of negative charge is brought near a neutral metal rod. The half of the rod closer to the sphere has a surplus charge of 7×10^4 units. What is the magnitude of the charge on the half of the rod farther from the sphe..
An ammeter with a full scale deflection for I=17.0 A has an internal resistance of 18 ohms. How should it be connected to the ammeter, in series or in parallel
A possible spacecraft design uses a solar sail made of aluminized plastic. As sunlight reflects off the sail, radiation pressure drives the spacecraft outward away from the sun. what is its acceleration at the radius of the Earth's orbit
What is the relative luminosity of a star which is the same size as the Sun but has twice the surface temperature (11600 K, or 12000 K)? only one-half the surface temperature (2900 K)?
A building has two open doors facing the bay. The walls of the building absorb sound well, so multiple reflections can be ignored. find the distance d between the door centers
A car traveling at 16.00 m/s runs out of gas while traveling up a 19 degree slope. How far up the hill will it coast before starting to roll back down.
A playground carousel is free to rotate about its center on frictionless bearings, and air resistance is negligible. What is the person's mass
A cannon ball is shot straight upward with a velocity of 77.50 m/s. What is the maximum height attained by the cannon ball
Assume light coming from the air strikes a rectangular slab of material with index of refraction 2.5 and incident angle 60 degrees. At what angle from the normal will it leave the other side of the material?
Moving a charge from point A, where the potential is 310 , to point B, where the potential is 120 , takes 4.5×10?4 of work. What is the value of the charge
An exoplanet of mass 7.4e26 kg orbits its parent star at an angle of inclination of 28.9 degrees. determine the period of the exoplanet in days
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