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A stone is dropped into a river from a bridge at a height h above the water. Another stone is thrown vertically down at a time t after the first is dropped. Both stones strike the water at the same time. What is the initial speed of the second stone? Give your answer in terms of the given variables and g.
an electric dipole consists of q330nc separated by a distance of 1200nm. the dipole is initially oriented in -i
A billiard ball of mass m = 0.150 kg hits the cushion of a billiard table at an angle of ?1 = 60.0° at a speed of v1 = 3.00 m/s. It bounces off at an angle of ?2 = 63.0° and a speed of v2 = 2.10 m/s. a) What is the magnitude of the change in momentum..
the expression f arv br2v2 gives the magnitude of the resistive force in newtons exerted on a sphere of radius r in
At a steel mill a 50 Kg chunk of iron at 22 Celsius is heated to it's melting point , completely melted , How much energy is required to heat the iron to it's melting point
A surveyor out late accidentally leaves the car lights on. Each of the two front lights is 40 W and each of the two rear lights is 6W. The lights are linked in parallel across a 12V DC car battery. An identical battery can draw 0.5 A for 80 hours.
The kinetic friction force between surface and disk slows down its linear motion while at the same time making the disk spin on its axis at an accelerating rate. Finally, the disk's rotation catches up with its linear motion, and disk begins to roll ..
A man can clearly see an object that is 2.00 m away(or more) without using his eyeglasses. how close can an object be to the eyeglasses and still be clearly seen by the man
A guitar string has a length of .8 m. If the wave speed ofthe spring id 560m/s, what is the frequency of the sixth harmonic
Consider an AC voltage source that produces a voltage given byV = Vmaxsin(2πft), with Vmax =19 V and f = 6.1 Hz. What is the instantaneous value of the voltage at t = 1.8 s?
Estimate the size of sensitive cells of the human eye, provided that the entrance pupil of the eye about 1 mm in diameter under usual sunlight conditions. Assuming the size of sensitive cells is such that diffraction limit is met.
The temperature of an ideal gas is increased from 110degreesCelcius to 360degrees C while the volume and the number of molesstay constant. By what factor does the pressure change
A particle of mass 29 g and charge 89 μC moves during a uniform magnetic field, in a region where the free-fall acceleration is -9.8 j m/s 2 . The velocity of the particle is a constant 17 i km/s, which is perpendicular to the magnetic field, what, t..
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