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The position of a particle moving with constant acceleration is given by x(t) = 3t2 + 7t + 4 where x is in meters and t is in seconds. (a) Calculate the average velocity of this particle between t = 5 seconds and t = 6 seconds. (b) At what time during this interval is the average velocity equal to the instantaneous velocity?
On her way to visit Grandmother, Red Riding Hood sat down to rest and placed her 1.7-kg basket of goodies beside her. A wolf came along, at what angle was Red Riding Hood pulling
A child does 350 J of work while pulling a box from the ground up to his tree house with a rope. The tree house is 6.6 m above the ground
What is the length of a box in which the minimum energy of an electron is 1.1 x 10^-18J
Monochromatic x rays are incident on a crystal for which the spacing of the atomic planes is 0.442. What is the wavelength of the x rays
q1. the sound level measured in a room by a person watching a movie in a home theatre system varies from 66 db during a
At the top of Earth's atmosphere, sunlight has an average intensity of 1350W/m^2. If the average distance from Earth to the Sun is 1.50x10^11m, at what rate does the Sun radiate energy?
q1. a pipe open only at one end has a fundamental frequency of 241 hz. a second pipe initially identical to the first
The speed of light in a transparent medium (such as glass) is less than the speed of light in a vacuum. Is this a violation of the theory of relativity.
Unpolarized white light is incident on a po- larizer and then falls on an analyzer whose TA makes an angle of %u03B8 = 33.8%u25E6 with the polarizer, What is the fraction of the original light transmitted through both the polarizer and analyzer
A softball having a mass of 0.255 kg is pitched at 92.3 km/hr. By the time it reaches the plate, estimate the average force of air resistance during a pitch
Astronomical observations of our Milky Way galaxy indicate that it has a mass of about 8 ? 1011 solar masses. What should the orbital period of that star be
Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to report the mass truthfully). How far apart are the half-kilogram marks on the scale
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