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A train is at constant 60km/h moves east for 40minute, then in a direction 50 east of due north for 20 minute, and then west for 50minute.
(a) Find the magnitude of its average velocity during this trip?
(b) Find the angle of its average velocity during this trip?
A car accelerates uniformly from rest to a speed of 40.0 mi/h in 12.0 s. Find (a) the distance the car travels during this time and (b) the constant acceleration of the car.
A meter stick of mass 0.25 kg is mounted on a perpendicular axis at the 20 cm mark. Determine the angular acceleration of the ruler
A flight attendant pulls her 63-N flight bag a distance of 277-m along a level airport floor at a constant velocity. The force she exerts is 35N at an angle of 57° above the horizontal. Determine the work completed by the force of friction on flig..
A battery of ε = 2.00 V and internal resistanceR = 0.450 Ω is driving a motor. The motor is lifting a 2.0N mass at constant speed v = 0.50 m/s. Assumingno energy losses, find the current i in the circuit. Enter the lower current.
A proton enters the gap between a pair of metal plates (an electrostatic separator) that produces a uniform, vertical electric field between them. Ignore the effect of gravity on the proton.
Light of wavelength 5.30 102 nm passes through a slit of width 0.230 mm. Determine the width of the first-order bright fringe
Three separately located capacitors (capacities: C1, C2, C3) with the electric charges: Q1, Q2, Q3 initially are not connected by conductors
An electron and a proton are separated by 2.4 nm, What is the magnitude of the force on the electron
In a serious accident, a nuclear power plant%u2019s reactor vessel cracks, and all of the cooling water drains out. how much energy will it take to melt the core
A miniblack hole formed as a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (Assume that your mass is 50).
A simple pendulum is made from a 0.55-m-long string and a small ball attached to its free end. how much time elapses before it attains its greatest speed
A convex lens is held over a piece of paper outdoors on asunny day. When the paper is held 30 {\rm cm} below the lens, the sunlight is focused on the paper and the paper ignites
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