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A world-class sprinter accelerates to his maximum speed in 4s . He then maintains this speed for the remainder of a 100m race, finishing with a total time of 9.1s.
Part A What is the runner's average acceleration during the first 4s ?
Part B What is the average acceleration during the last 5.1 s?
Part C What is his average acceleration for the entire race?
What is the rms speed of nitrogen molecules contained in an 7.9 m3 volume at 2.1 atm if total amount of nitrogen is 1100 mol.
I am rising upward in a hot air balloon. I am holding my coffee container and i accidentally let go of it when I am leaning out and enjoying the view. Whats the greatst height the container achieved in its flight
Two loudspeakers placed 6.00 m apart are driven in phase by an audio oscillator having a frequency range from 1908 Hz to 2471 Hz, At what frequency of the oscillator does the sound reaching point P interfere constructively
A large boulder rests on a cliff 500 m above a small village in such a position that, What is the initial speed of the boulder
A spherical weather balloon is filled with hydrogen until its radius is 3.40 m, Find the buoyant force acting on the balloon, assuming the density of air is 1.29 kg/m3.
A luminous point is moving at speed Vo toward a spherical mirror of radius R along its axis. What is the speed at which the image is moving
A uniform plank of length 5.40 m and weight 217 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 417 N walk on the overhanging part of the plank before it immedia..
A cylindrical 87.50ohm resistor is made from a coil of copper wire whose total mass is 18.0 g, What is the diameter of the wire
Each of two small spheres is positively charged; the combined charge totals 60.0 nC. A.) What is the charge on each sphere if the spheres are repelled with a force of magnitude 0.270mN when placed 0.100m apart?
A proton is passing the origin. The magnetic field at the (x,y,z) position ( 2mm , 0 mm, 0 mm) is1.4×10?13?^T. What is the speed of the proton
A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 10-4°C-1). To what temperature must the frames be heated
A mine car (mass=490 kg) rolls at a speed of 0.50 m/s on a horizontal track, as the drawing shows. Determine the speed of the car-coal system
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