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Police investigators, examining the scene of an accident involving two cars, which nearly came to a stop before colliding, the coefficient of kinetic friction between rubber and he pavement is about 0.80. Estimate the initial speed of that car assuming a level road.
In a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. How long is the arm of the centrifuge
9 grams of Alum at 200 C and 21 grams of Copper anre dropped into 50 cm^3 of Ethyl Alcohol at 15 C. what was the intitial temp of the Copper
q1. a 19 kg box slides 4.0 rm m down the frictionless ramp shown in the figure then collides with a spring whose
An electric dipole with dipole moment P=(3.24 i + 4.30 j)(1.56 x 10^-30 C*m) is in an electric field E=(4055 N/C) i, What is the potential energy of the electric dipole
calculate the number of moles in the 2.00 L volume of air in the lungs of the avg person. (Air=37.0 degree Celcius)
An amateur astronomer decides to build a telescope from a discarded pair of eyeglasses. One of the lenses has a refractive power of 11 diopters, How far apart should the lenses be separated
The pilot of an airplane executes a loop-the-loop maneuver in a vertical circle. What is the pilot's apparent weight at the lowest point if his true weight is 160 lb
A 40.0-kg shell is fired from a gun with a muzzle velocity 85.0 m/s at 29.0o above the horizontal. What is the horizontal speed of the other fragment
What is the electric potential energy in joules of two electrons separated by 1.33 nm, What would be it be if the separation was doubled
An airplane has an effective wing surface area of 15 m2 that is generating the lift force. What is the weight of the plane
Consider a camera that moves its lens back and forth to focus on objects near and far. As an object approaches, what direction should the lens move
how much heat transfer is req to raise the temp of a 0.750 kg al pot containing 2.50 kg of water from 30C to the boiling point and then boil away 0.750kg of water
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