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A horse canters away from its trainer in a straight line, moving 119m away in 15.3s. It then turns suddenly and gallops halfway back in 5.0s.
a. Compute its average speed for the entire trip.
b. Compute its average velocity for the entire trip, using "away from the trainer" as the positive direction.
a jetliner is moving at a speed of 270 km/h. the plan then decelerates at 4.5 m/s2. what is the minimum runway length on which this aircraft can land
A cyclist travelling at 5.0 m/s uniformly accelerates up to 10.0 m/s in 2.0 sec. Find through what angle does the pebble revolve
A 60.0g ice cube can slide without friction up and down a 33.0 slope. what distance will it travel up the slope before reversing direction
You've got light traveling in air that hits the top of awater-filled swimming pool perpendicularly (i.e. the angle of incidence is zero). Mathematically, Snell's Law predicts that nobend occurs (since the sine of zero is zero...so you'll just getz..
What is the speed of the second asteroid? Now suppose that the first and second asteroids carry charges of 3.68 C and -3.68 C, respectively. How fast would the second asteroid have to be moving in order to occupy the same circular orbit as before?
two particles with electric charges q and ?3q are separated by a distance of 0.8 m. a if q 2.2 c what is the electric
Consider a 0.417-kg apple attached to a tree. Does the apple exert a gravitational force on the Earth? If so, what is the magnitude of this force
A car not refrigerator takes heat from water at 0 degrees Celsius and rejects heat to a room temperature at 20 degrees Celsius. Assume that 78 grams of water at 0 degrees Celsius are converted to ice at 0degrees Celsius by the refrigerator.
Exploding shoes. The rain-soaked shoes of a person may explode if ground current from nearby lightning vaporizes the water. The sudden conversion of water to water vapor causes adramatic expansion that can rip apart shoes. Water has density 1000kg..
An elevator 700000 N is accelerating downward at the rate 4.55 ft/s^2. The maximum tension that the cable can handle is 125000 N. What is the shortest distance the elevator could travel?
Singly ionized helium He+ is hydrogenlike. (a) Construct a carefully scaled energy level diagram for He+, showing the levels for n=1, 2,3,4,5, and 8. (b) What is the ionization energy of He+?
Light shines during a single slit whose width is 8.60 10-4 m. A diffraction pattern is formed on a flat screen located 4.0 m away. The distance among the middle of the central bright fringe and the first dark fringe is 4.75 mm. What is the wavelength..
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