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Fuel aboard a rocket has a density of 2870 kg/m^3 and is ejected with a speed of 2650 m/s. if the engine is to provide a thrust of 1.21 x 10^6 N, what volume of fuel must be burned per second? Answer in units of m^3/s.
A Carnot engine uses hot and cold reservoirs that have temperatures of 1850 and 845 K, respectively. The input heat for this engine is QH. The work delivered by the engine is used to operate a Carnot heat pump. The pump removes heat from the 845-K re..
An average friction force of 4000 N impedes the car’s motion so that its speed at the bottom of the driveway is 3.8 m/s. Illustrate what is the length of the driveway?
Find the total number of lines in a 2.90 wide diffraction grating whose third-order spectrum has the 640 hydrogen- spectral line at an angular position of 39.0.
A string trimmer is a tool for cutting grass and weeds; it utilizes a length of nylon "string" that rotates about an axis perpendicular to one end of the string. What is the length of the rotating string in meters
A parallel-plate air capacitor is to store charge of magnitude 290pC on each plate when the potential difference between the plates is 36.0V, If the area of each plate is 6.80 cm2, what is the separation between the plates
A long wire lying along the x-axis carries a current of 2.8 A in the +x direction. There is a uniform magnetic field present, given by B=0.003i + 0.004j + 0.002k, where i, j, k are the unit vectors along the cartesian coordinate axes') in units of..
A monkey is swinging on a vine. The monkey's mass is 72kg, What is the length of the vine
A bat strikes a 0.145- baseball. Just before impact, the ball is traveling horizontally to the right at 40.0, and it leaves the bat traveling to the left at an angle of 30 above horizontal with a speed of 65.0. Find the vertical component of the a..
The speaker and two microphones shown in the figure are arranged inside a sealed container filled with neon gas. What is the speed of sound in neon gas
A metal guitar string has a linear mass density of ? = 3.20 g/m. What is the speed of transverse waves on this string when its tension is 80.0 N
You hang different masses M from the lower end of a vertical spring and measure the period T for each value of M. What is the mass of the spring
Two thin lenses with a focal length of magnitude 7.50 cm , the first diverging and the second converging, are located 5.63 cm apart. How far from this first lens is the final image formed
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