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Question: In the 1950s, an experimental train that had a mass of 2.00 104 kg was powered across a level track by a jet engine that produced a thrust of 5.30 105 N for a distance of 509 m. Assume that air resistance is negligible.
(a) Find the work done on the train.(b) Find the change in kinetic energy.
A swimming pool requiring a 2.0 hp motor to filter and circulate the water runs for 18 hours a day. What is the monthly electricity cost for running this pool pump
A virtual image is formed 22.0cm from a concave mirror having a radius of curvature of 44.0cm. find the position of the object
Three point charges are located near a spherical Gaussian surface of radius R = 6 cm. What is the electric flux through this surface
A block of mass .250 kg traveling at (1.0 m/s)y hits a second block with a .375 kg mass travelling at (1.2m/s)x.
What is the vertical force on the support closest to the piano.
On a workday, the average decibel level of a busy street is79dB with 100 cars passing a given point every minute. what is the decibel level of the street
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800kg/m^3, length 91.5cm, obtain the weight of the rod
A flywheel rotates at a rate of 20 rpm. A motor provides a constant angular acceleration so that 30 secondslater it turns at a rate of 70 rpm, what is the angular acceleration of the splotch of paint
The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.2 × 10-15 m. What is the ratio of the density of the hydrogen nucleus to the density of the complete hydrogen atom
Oil - 40% efficient; CO2 Emissions (g/mol) 70 g/mol Natural gas - 23% efficient; CO2 Emissions (g/mol) 50g/mol Coal - 23% efficient; CO2 Emissions (g/mol) 90 g/mol. How much CO2 is produced per second
A periscope for a submarine uses two totally reflection 45°-45°-90° prisms with total internal reflection on the side adjacent to the 45° angles. It springs a leak, and the bottom prism is covered with water. Explain why the periscope no long works. ..
A Porsche 944 Turbo has a rated engine power of 217 . 30% of the power is lost in the drive train, and 70% reaches the wheels. The total mass of the car and driver is 1500 , and two-thirds of the weight is over the drive wheels.
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