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The 100- dash can be run by the best sprinters in 10.0. A 62- sprinter accelerates uniformly for the first 43 to reach top speed, which he maintains for the remaining 57 .
What is the average horizontal component of force exerted on his feet by the ground during acceleration?
What is the speed of the sprinter over the last 57 of the race (i.e., his top speed)?
The equation connecting s, p, and f for a simple lens can be employed for spherical mirrors, too. A concave mirror with a focal length of 8cm forms an image of a small object placed 10cm in front of the mirror. Where will this image be located?
Two trains, each having a speed of s, are headed at each other on the same straight track. what is the total distance the bird travels
A bullet is moving at a speed of 367 m/s when it embeds into a lump of moist clay. The bullet penetrates for a distance of 0.0621 m. Determine the acceleration of the bullet while moving into the clay. (Assume a uniform acceleration.)
A step-down transformer (turns ratio = 1:8) is used with an electric train to reduce the voltage from the wall receptacle to a value needed to operate the train. What is the current in the primary coil
A current flow in a circle loop is clockwise. What is the magnetic field at the center of the loop point
Suppose that an ion source in a mass spectrometer produces doubly ionized gold ions (Au2+), each with a mass of 3.27 × 10-25 kg. Determine the radius of the path
A person takes in a breath of 10!C air and holds it until it warms to 37.2!C. The air has an initial volume of 0.73 L, find the work done by the air on the lungs
A stone is dropped from rest from the roof of a 100-m high building; 2.00 s after that, a second stone is thrown straight down with initial speed v0, and the second stone passes the first stone 21.6 m above ground.
If this amount were shaped into a cube, what would be the length of one edge of that cube (in meters)
A mirror produces an image that is located 48.00 cm behind the mirror when the object is located24.00 cm in front of the mirror. What is the focal length of the mirror?
Awrecking ball (weight = 4800 N) is supported by a boom, which maybe assumed to be uniform and has a weight of 3600 N. compute the tension in the support cable
A grating spectrometer is used to resolve third order peaks from two wavelengths of ?1 = 455.00 nm, What is the minimum number of slits this grating must have
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