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A rocket is launched straight up from the earth's surface at aspeed of 1.6×104 m/s. What is its speed when it is very far away from the earth?
The velocity of an airplane is 200km/hr due west. What is the velocity of the aircraft relative to the ground
When a converging lens is used in a camera (as in the first drawing), the film must be placed at a distance of 0.170 m from the lens to record an image of an object that is 4.70 m from the lens
The bulk modulus for helium is 1.01x105 N/m2 and its density is 0.179 kg/m3. How many times the speed of sound in air (331m/s) is the speed of sound in helium?
Given a wave produced by a simple harmonic oscillator whose displacement in meters is given by the equation [y = 0.3cos(36?t)]
Calculate the number of coulombs of positive charge in 285 cm3 of (neutral) water. (Hint: A hydrogen atom contains one proton; an oxygen atom contains eight protons.)
Biometric measurements indicate that each hand typically makes up about 1.25% of body weight. What horizontal force should her wrist exert on her hand.
question1consider an array of parallel wires with uniform spacing of 1.30 cm between centers. in air at 20.0degc
An electron is in the ground state of an infinite square well. The energy of the ground state is E1 = 0.37 eV. What is the width of the square well
Calcium has a work function of 2.8 eV. If light of frequency 4.3 1015 Hz strikes the surface of calcium, what is the energy of the ejected electrons
explain the rules for your state lottery such as 60 balls total with 5 balls picked each drawing. use combinations to
A 4-kg block lies on a horizontal table whose coefficient of friction is 0.3. A horizontal rope is redirected by a uniform solid disk (pulley) of mass 2 kg to a mass of 12-kg hanging off the table. What is the angular acceleration of the disk
A string of length L vibrates at its fundamental frequency. What is the amplitude of each of the traveling waves that form this standing wave
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