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A car with good tires on a dry road can decelerate at about 5.0 m/s2 when braking. Assume the car is initially traveling at 55 mi/h.
(a) Determine how much time does it take the car to stop?
(b) Determine what is the stopping distance?
Two wires run parallel to each other with currents I1 = 9.3 A, and I2 = -17.1 A. find the magnitude of the force per meter of length
The diameters of the main rotor and tail rotor of a single-engine helicopter are 7.58 m and 0.98 m, respectively. Calculate the speeds of the tips of both rotors
Gayle runs at a speed of 4.65 m/s and dives on a sled, initially at rest on the top of a frictionless snow covered hill. After she has descended a vertical distance of5.00 m, her brother, who is initially at rest, hops on her back and together they c..
Jason has a 45-power telescope whose objective lens has a focal length of 120 {\rm cm}. What is the angular magnification of his sister when viewed through the "wrong" end of the telescope
A velocity selector has a magnetic field of magnitude 0.32 T perpendicular to an electric field of magnitude of 0.34 MV/m. The mass of the electron is 9.11x10-31 kg. How much energy must electrons have in order to pass through undeflected
a horizontal rifle is fired at a bulls-eye. the muzzle speed of the bullet is 670 ms. the gun is pointed directly at
The speed of an ion in a particle accelerator is doubled from 0.430c to 0.860c. The initial relativistic momentum of the ion is 4.90 x 10-17 kg·m/s. find the final relativistic momentum of the ion
question two particles with identical positive charges and a separation of 2.70 10-2 m are released from rest.
In a hydroelectric installation, a turbine delivers 1890 hp to a generator, which in turn converts 37.9% of the mechanical energy into electrical energy. Under these conditions,
A canon ball shots with an initial velocity of 141 m/s at an angle of 45o follows a parabolic path, what is the speed of the cannon ball when it hits the balloon
A three-picket fence (mass = 406 grams) on a glider is pulled by a constant force along a horizontal frictionless surface. Find the magnitude of the constant force in Newtons
An open organ pipe (i.e., a pipe open at both ends) of length Lo has a fundamental frequency Fo, what is the new fundamental frequency
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