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A car traveling east at 40 m/s passes trooper hiding at the road side. the driver uniformly reduces his speed to 25 m/s in 3.5 second. Find the magnitude and direction of car acceleration as it slow down.
A 40 g rifle bullet travelling 260 m/s buries itself in a 4.0 kg pendulum hanging on a 3.0 m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of pendulum's displacement.
A siren has a frequency of 750 Hz when it is at rest, whereas it has an apparent frequency of 800 Hz when it is moving toward a stationary observer
Frame S' travels at speed V_1 along the x axis of frame S (in the standard configuration). Frame S'' travels at speed V_2 along the x'' axis of frame S'; (also in the standard configuration). By applying the standard Lorentz transformation twice find..
What is the propotion of the mass of these excess electrons to the mass of the penny.
A nonconducting solid sphere of radius R carries a volume charge density that is proportional to the distance from the center: ? = Ar for r ? R, where A is a constant; ? = 0 for r > R. Find the total charge in the sphere
The average intensity of light emerging from a polarizing sheet is0.767 W/m2, and the averageintensity of the horizontally polarized light incident on the sheetis 0.937 W/m2.
The potential difference between the plates of a capacitor is 247 V. Midway between the plates, a proton and an electron are released. find the initial speed of the proton
A 0.280 kg ball is dropped from rest at a point 1.35m above the floor. The ball rebounds straight upward to a height of 0.780 m. What are the magnitude and direction of impulse of the net force applied to the ball during the collision with the flo..
A computer disk is 8.0 centimeter in diameter. A reference dot on the edge of the disk is initially located at θ=45 degree. Find the speed of the reference dot at t = 1.0 sec
A sharp image is located 84.0 mm behind a 64.0 mm focal-length converging lens. Find the object distance using a ray diagram
Plane leaves the airport in Galisto and flies a distance 180 at an angle 68 east of north and then changes direction to fly the distance 250 at an angle 48 south of east, after which it makes an immediate emergency landing in a pasture.
This is a conceptual question, The fundamental source of asound wave is a vibrating object, what is the fundamental source of an electromagnetic wave
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