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A 2kg book is sitting on a horizontal glass table top. A woman pushes the book across the table with a horizontal force F. The book's position changes as a function of time given by x(t) = (2.9 m/s^3)t^3-(3.6 m/s^2)t^2. What is the book's velocity at .2 second? Calculate the magnitude of the force at .2 seconds. Find the work done by the force during the first 1.2 seconds of its motion.
during his many appearances at the tour de france champion bicyclist lance armstrong typically expended an average
An unknown material has a normal melting/freezing point of -25.1° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C°). What is the latent heat of fusion of the unknown material
If a sound wave traveles throught soft tissue a a velocity of 1.54 mm/microsecond for 2203ms. How far has the sound wave traveled using the echo-ranging formula d=ct
The coefficient of area expansion of steel is 24 ? 10-6/°C.
If I hit a trampoline with a velocity of 38.8 m/s at 53.4 degrees above the horizontal, and I leave the trampoline at an angle of 36 degrees from the horizontal at a velocity of 40 m/s and am in contact with the trampoline for 0.5 seconds.
q1. a sled is being held at rest on a slope that makes the angle with the horizontal. after the sled is released it
A train is traveling up a 5.0 degrees incline at a speed of 2.65 m/s when the last car breaks free and begins to coast without friction. How far did the last car travel before momentarily coming to rest
When the coil of a motor is rotating at maximum speed, the current in the windings is 4.33 A. When the motor is first turned on, calculate the resistance of the windings.
An absorption line of the element beryllium is observed in the spectrum of the galaxy above as lying 509.4 nm. What is the speed of the recession of the galaxy in km s^1 assuming that the speed of light is c = 3.00 x 10^5 km s^-1. And what is the ..
aqueous solutions of sodium hydroxide and ironiii sulfate are mixed. write the balanced molecular equation for this
A college student renting in a home has a circuit box capable of drawing only 25.0 A before blowing a fuse. With the common wall voltage of 120 V, calculate the maximum power that this home may use
A 1.32 kg book slides 1.15 m along a level surface. The coefficient of kinetic friction between book and surface is 0.136. Find the work done by friction
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