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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
If the coefficient of kinetic friction between the box and the roof is 0.55, with what speed must you push the box to have it gently come to rest right at the edge of the roof.
When a beam of unpolarized light of intensity 2.4 X 10-4W/m 2 passes during a thin polarizing filter the transmitted light is linearly polarized in the direction 30 degrees from the x-axis. What is the intensity of the transmitted light?
discuss the mechanism of oscillating reactions using the briggs-rauscher or the belousov-zhabotinsky reactions as
A converging lens with focal length of 11.8 cm is placed in contact with a diverging lens with a focal length of 21.1 cm. What is the focal length of the combination
Presume a diode consists of a cylindrical cathode with a radius of 6.200×10 -2cm, mounted coaxially within a cylindrical anode with a radius of 0.5580 cm. The potential dissimilarity between the cathode and anode is 360V. An electron leaves the su..
the led will only light up if enough electrical current is flowing through it. the amount of current is given by i vr
A special kind of light bulb emits monochromatic light of wavelength 652 nm. How many photons are emitted by the bulb during its lifetime of 660 h
he car is suspended beneath the helicopter by a steel cable. Illustrate what is the lift force exerted on the air by the helicopter's rotor?
the beam shown below has a rectangular cross-section with a width dimension perpendicular to the paper of 0.375 inches
a uniform electric field of 8 vm exists between the plates of a parallel plate capacitor. how much work is required to
A thin lens with two concave surfaces, one with a radius of curvature magnitude of 20 cm and the other with a radius of curvature magnitude of 30cm am gas an index of refraction of 1.5. what is the lateral magnification
A car is traveling to the left, which is the negative direction. The direction of travel remains the same throughout this problem. find the acceleration
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