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A person travels by car from one city to another with dissimilar constant speeds between pairs of cities. She drives for 30mins at 80 km/h, 12 min at 100 km/h, and 45 min at 40 km/h and spends 15 min eating lunch and buying gas. (a) Decide the average speed for the trip (b) Decide the distance among the initial and final cities along the route.
An airplane is flying with a velocity of 95m/s at an angle of 19.0^circ above the horizontal. When the plane is a distance 124m straight above a dog that is standing on level ground, suitcase drops out of luggage compartment.
A 0.3 kg ball traveling at 5 m/s strikes a wall and rebounds elastically, the collision took 0.02 seconds. What is the Impulse? What is the force on the wall
An object weighing 330 N in air isimmersed in water after being tied to a string connected to abalance. The scale now reads 255 N. Find the density of the object
An electron in a cathode-ray tube is emitted from a hot filament at a negligible speed. , whereupon it accelerates across a potential difference of 1.00 x 106 V. Determine its final speed compared to the classical result.
when a shower is turned on in a closed bathroom the splashing of the water on the bare tub can fill the rooms air with
Over a year's time, a person receives a biologically equivalent dose of 21 mrem (millirems) from cosmic rays, What is the person's absorbed dose in rads
A uniform electric field of magnitude7.5×105 N/C points in the positive xdirection. Find the change in electric potential energy of a5.5-\mu {\rm{C}}
In a head-on collision, a car stops in 0.29 {s} from the speed of 28 {m/s}. The driver has a mass of 78 {kg}, and is, fortunately, tightly strapped into his seat. what force is applied to driver during that fraction of a second.
Two tiny, spherical water drops, with equal charges of -4.00 x 10-17 C, have a center-to-center separation of 1.4 centimeter. Find the magnitude of electrostatic force acting between them
A parallel-sided plate of glass having a refractive index of 1.58 is in contact with the surface of water in a tank. What angle does this ray make with the normal in the water
The dimensions of a parallel-plate capacitor are all increased by afactor of nine. By what factordoes the capacitance change? (The dimensions refer to the lengthand width of a plate and the spacing between the plates.)
If the refractive index of air is 1.00029 and all the air is pumped out of the cell, how many fringe-pairs will shift by
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