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A vehicle starts from C, goes 50 kilometer in a straight line to D, immediately turns around and returns to C. The time for the first part (C to D) was one hour and for the second part (D to C) was two hours. Find the magnitude of the average velocity of the car for this round trip?
A 150 MW laser pulse is focused with a lens to a diameter of 4.99 ?m. What is the laser beam's electric field amplitude at the focal point
The carbon isotope 14-C is used for carbon dating of archeological artifacts. What is the recoil speed of the nucleus
What is the pressure change for water that flows through a steel pipe of diameter 0.15 m at a velocity of 2 m/s? If the flow were laminar regime what would be the pressure change? How much energy per mass is required to pump the fluid in turbulent..
In an experiment designed to measure the strength of a uniform magnetic field produced by a set coils, the electron are accelerated from rest through a potential difference of 350V, and the beam associated with the electrons is measured to have a ..
A boat moves through the water of a river at 9 m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.9 m/s, how long does it take the boat to make a round trip consisting of a 225 m displacement d..
a certain elevator cab in a new york hotel has a total run of 180 m. its maximum speed is 302 mmin. its acceleration
At a distance of 7.00×10^12 m from a star, the intensity of the radiation from the star is 15.1 W/m^2. Assuming that the star radiates uniformly in all directions, what is the total power output of the star?
What mass (in grams) of steam at 100 °C must be mixed with 287g of ice at its melting point, in a thermally insulated container, to produce liquid water at 65°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, an..
Coil 1 has L1 = 47 mH and N1 = 104 turns. Coil 2 has L2 = 68 mH and N2 = 215 turns. The coils are fixed in place; what self-induced emf appears in that coil
A 1.85 kg mass is attached to a light cordthat is wrapped around a pulley of radius 3.60 cm, which turns with negligible friction. Themass falls at a constant acceleration of 2.70 m/s2. Find the moment of inertia of the pulley.
the minimum stopping distance for a car traveling at a speed of 30msand is 60 m including the distance traveled during
two spaceships pass each other travelling in opposite directions. the speed of ship b as measured by a passenger in
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