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A man who weighs 675 Newton is riding a 98 N mountain bike. Assume the entire weight of the rider and bike is supported equally by the two tires. If the gauge pressure in each tire is 8.90 x 105 Pascal, find the area of contact between each tire and the ground? m2
An AC power generator produces 51 A (rms) at 3600 V. The voltage is stepped-up to 100,000 V by an ideal transformer, and the energy is transmitted through a long-distance power line that has a resistance of 104.
A ball is launched with an initial velocity of 24.9 m/s at a 45° angle from the top of a cliff that is 9.00 m above the water below. What is the balls speed when it hits the water
a 3.5 cm tall object is 15cm in front of a diverging lens that has -27 cm focal length. calculate the image position
Steam enters a compressor at p1= 6 bar, T1= 300 oC and exits at p2= 10 bar. The work on the system is measured as 200 kJ per kg of water vapor flowing. Determine the isentropic turbine efficiency.
a small ball is launched with a speed of 40 m/s and an angle of 30 degrees toward the building shown. determine the time it takes for the ball to reach the building
a 1.8 book is lying on a 0.70 -high table. you pick it up and place it on a bookshelf 2.3 above the floor.1. how much
A flatbed truck is carrying a load of timber which is not tied down. the mass of the timber is 800 kg, What is the highest acceleration that the truck can have without losing its load
A solenoid of radius 1.6 cm has 351 turns and a length of 10 cm.The permeability of a free space is 1.25664 × 10^?6 V · s/A · m. Find its inductance. Find the rate at which current must change through it to produce an emf of 56 mV.
A parallel-plate capacitor with C = 13 mu or micro FF is charged so as to contain 1.1 J of energy, what is the energy density (the energy per unit volume)
A turbine in an electric power plant rotates at 3600 rpm. Discover its angular speed in radians/second, and decide the linear speed of a point 72cm from the axis of rotation. The power plant shuts down, and the turbine coast to a halt in 590s.
A telescope was used as a testbed for evaluating adaptive optics systems. This telescope has a 3.58 meter primary mirror with a focal ration of f/2.2. What is the plate scale of this telescope
In everyday life we know that something described as 'white hot' is hotter than something described as 'red hot'. What is the physics behind these everyday sayings? The BB spectrum: Peak emission wavelength gets shorter as object gets hotter: Wave..
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