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The "reaction time" of the average automobile driver is about 0.7s. (The reaction time is the interval between the perception of a signal to stop and the application of the brakes.) An automobile can slow down with an acceleration of 11.0ft/s2.
A) Compute the total distance covered in coming to a stop after a signal is observed from an initial velocity of 12.0.
mi/h
B) Compute the total distance covered in coming to a stop after a signal is observed from an initial velocity of 50.8.
A 230-N child is in a swing that is attached to ropes 1.90m long. Find out the gravitational potential energy associated with child relative to her lowest position at the following times.
After flying for 15 min in a wind blowing 42 km/h at an angle of 32° south of east, What is the speed of the airplane relative to the air
A uniform-density 8 kg disk of radius 0.20 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with the constant force of 45 N through a distance of 0.7 ..
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Two metal spheres, each of radius 1.0 cm, have a center-to-center separation of 2.0 m. Sphere 1 has charge +2.90 10-8 C. Calculate the potential at the point halfway between the centers
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A 2.4kg object is moving along the x-axis at 1.55m/s. As it passes the origin, two forces F1 and F2 are applied, both in the y direction (plus or minus).
After a plant or animal dies, its 14C content decreases with a half-life of 5730 years. what is the age of the ancient site
At high noon, the Sun delivers 825W to each square meter of a blacktop road. If the hot asphalt loses energy only by radiation, what is its equilibrium temperature.
The frequency and wavelength of a transverse wave on a string are 340 Hz and 0.70 m, respectively. what is the linear density of the string
A photon has the same momentum as an electron moving with a speed of 1.83×105 m/s. What is the wavelength of the photon
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