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The author's cat enjoys chasing chipmunks in the front yard. In this game, the cat sits at one edge of a yard that is w = 29 m across (see figure), watching as chipmunks move toward the center. The cat can run faster than a chipmunk, and when a chipmunk moves more than a certain distance L from the far end of the yard, the cat knows that it can catch the chipmunk before the chipmunk disappears into the nearby woods. If the cat's top speed is 7.0 m/s and a chipmunk's top speed is 4.2 m/s, find L. Assume the chipmunk and cat move along the same straight-line path.
n object is projected from the surface of the earth with a speed of 1.98×104 m/s. What is its speed when it is very far from the earth
A 5.0-m-wide swimming pool is filled to the top. The bottom of the pool becomes completely shaded in the afternoon, How deep is the pool
A small, 200g cart is moving at 1.60m/s on an air track when it collides with a larger, 2.00kg cart at rest. What is the speed of the large cart after the collision
Determine the temperature at which the resistance of atungstenwire will be three timesits value at 20°C. Assume its coefficient of resistivity remains constant.
How much heat must be removed from 0.40 kg of water at 0 degrees C to make ice cubes at 0 degrees C?
The human eye can detect light intensities as small as about 8 10-23 W/m2. How does this force compare to the weight of an electron
A car moving with an initial speed v collides with a second stationary car that is one-half as massive. Find the final speed of the second car
A microscope has an objective lens of focal length 5.40 mm. The objective forms an image 15.9 cm from the lens. The focal length of the eyepiece is 2.80 cm. What is the distance between the lenses
A skier approaches the base of an icy, frictionless hill with a speed of 10.7 . The hill slopes upward at 19.0 above the horizontal. Find the acceleration of this skier
For a science experiment you need to electroplate a 120nm-thick zinc coating onto both sides of a very thin, 2.5cm X 2.5cm copper sheet. how long will it take the zinc to reach the desired thickness
A vertical force F is applied to a block of mass m that lies on a floor. what happens to the magnitude of normal force on the block from the floor as magnitude F is increased from zero if force F is downward?
A second package is throw downward from the plane with a vertical speed V1=58 m/s. find the horizontal distance traveled by this package
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