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A freight train has a mass of 1.5 × 107 kg. If the locomotive can exert a constant pull of 7.9 × 105 N, how long does it take to increase the speed of the train from rest to 88 km/h?
___min
Two identical aluminium objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at the higher potential.
A disk with the radius 0.60 m begins at rest and is then spun up to a high speed by applying an angular acceleration of 0.25 rad/s^2 for 20 seconds. What is the final angular velocity of the disk
A hydrogen atom in its ground state is excited to the n = 5 level. It then makes a transition directly to the n = 2 level before returning to the ground state. What are the wavelengths of the emitted photons
If a positron (a positively charged particle with the mass of the electron) and a proton go through the same potential difference, By what factor is the wavelength shorter
A boat must cross a 260-m-wide river and arrive at a point 110 m upstream from where it starts, What is the speed of the boat in still water
A transverse traveling wave on a cord is represented by D = 0.25 sin (6.8x + 28t), Determine maximum and minimum speeds of particles of the cord
A convex spherical mirror, whose focal length has a magnitude of 19.0 cm, is to form an image 12.4 cm behind the mirror. What is the magnification of the mirror
You are driving your car, and the traffic light ahead turns red. You apply the brakes for 2.56 s, and the velocity of the car decreases to + 4.62 m/s. What is the car's displacement
a spring has a constant k=8.75 N/m. if the spring is displaced 8.150 m from its equilibrium position, what is the force that the spring exerts
presume you had job offers from two companies that differed only in how often they produced CEOs. Would these differences affect your decision.
The cookie you will eat after this exam will have a mass of 186 grams. How much energy would this cookie give you
Two air-track gliders of eual mass are initially moving in the same direction along a straight line, what are the speeds and directions of the gliders after the collision
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