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As a function of time, the velocity of the football can be written as . (If the acceleration of an object is constant, its average acceleration is the same for all time periods.) Calculate the average acceleration vector of the football for the time periods to.
The spring of the pressure gauge shown in has a force constant of 1 400N/m, and the piston has a diameter of 1.60cm. When the gauge is lowered into water in a lake, what change in depth causes piston to move in by 0.850cm.
A point P is on a rim of a wheel of radius 2.0m. At time t=0 wheel is at rest and P is on the x-axis. The wheel undergoes a uniform angular acceleration of 0.01 rad/s2 about the center O. Find out the time t, when P returns to an original position on..
A highway is to be built between two towns, one of which lies 42.0 km south and 76.0 km west of the other. What is the shortest length of highway that can be built between the two towns, and at what angle would this highway be directed?
At a factory, a noon whistle is sounding with a frequency of 480-Hz. As a car travelling at 79 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory.
A body cools from 50 degre celcious to 49 degree celcious in 5 seconds. Hw long would it take to cool from 40 degree celcious to 39 degree celcious.
A surface completely surrounds a 3.5 × 10-6 C charge. Find the electric flux through this surface when the surface is (a) a sphere with a radius of 0.59 m, (b) a sphere with a radius of 0.16 m, and (c) a cube with edges that are 0.27 m long.
A particular guitar string is supposed to vibrate at 200Hz, but it is measured to actually vibrate at 209Hz. By what percent should the tension in the string be changed to get frequency to the correct value.
Laboratory measurement examine that the normal wavelength of this spectral line is 486.133 nm. Is the star coming toward us or moving away from us? At what speed.
A luge and its rider, with a total mass of 104 kg, emerges from a downhill track onto a horizontal straight track with the initial speed of 53 m/s. suppose they stop with the constant deceleration of 2.30 m/s2.
A 200 gm block of metal is heated to 100 degrees Celcius in boiling water. This block is after placed in an aluminum calorimeter cup (mass - 30gm; c - .22 cal/g degrees C) containing 180 gm of water at 20 degrees C.
You are driving to the grocery store at 20. You are 100 from an intersection when the traffic light turns red. Suppose that your reaction time is 0.70 and that your car brakes with constant acceleration. What acceleration would bring you to rest r..
What is the speed of the arrow as it leaves the bow.Two point charges, Q_1 = -6.9 mu C and Q_2 = 2.0 mu C are located between 2 oppositely charged parallel plates.
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