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A train 400 m long is moving on a straight track with a speed of 82.4 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.4 km/h. Assuming constant acceleration,determine how long the train blocked the crossing.Disregard the width of the crossing
Three identical point charges each of chargeq are located at the vertices of an equilateral triangle as in the figure shown below. The distance from the center of the triangle to each vertex isa. Show that the electric field at the center of the t..
After the collision, the 0.177 kg puck has a speed of 1.38 m/s at an angle of 27? to the positive x axis. Examine the velocity of the 0.302 kg puck after the collision.
Use the ideal gas approach to find the thermal velocity, and determine the scaling law based on the resulting equation
A proton and an alpha particle (charge = 2e, mass = 6.64 10-27 kg) are initially at rest, separated by 3.20 10-15 m. Find the speeds of the proton and alpha particle
A 10 microcoulomb charge is placed at the origin and a 20 microcoulomb charge is placed on the x-axis at x = 40 cm. what is the magnitude of the force it will experience
The wavelength of visible light ranges from 400 nm to 700 nm. Find the ranges of this light's angular frequency
The surface of the drum of a laser printer is negatively charged, except in certain "print black" regions, such as letterforms, thathave been discharged by a laser beam. Negatively charged inkparticles carrying a charge of 5.0 mC cling to the "pri..
a projectile is fired at angle of 30 from the horizontal with an initial velocity of 55 ms. find.1. the horizontal
If an electric wire is allowed to produce a magnetic field no larger than that of the Earth .45E-4 T at a distance of 27 cm
Two point charges have a total charge of 560 µC when placed 1.10m apart. The force each exerts on the other is 22.8N and is repulsive. What is charge on each other
A ball attached to a string starts at rest and undergoes a constantangular acceleration as it travels in a horizontal circle of radius0.30m. What is the tangential acceleration of the ball
A concave mirror is of hemisphjerical shape with radius 40cm. A thin layer of unknown transparent liquid is poured into mirror. The mirror liquid forms a real image and another real image is formed by the mirror alone.
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