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A person is designing a 10X telescope. If the telescope is limitedto a length of 20 cm, what is the approximate focal length of the objective?
A) 16 cmB) 17 cmC) 18 cmD) 19 cm
A helicopter is ascending vertically with a speed of 5.73m/s . At a height of 114m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: The package's initial speed equals the hel..
a diffraction grating 1.5 mm wide produces the fifth order pie/4 with light wavelength 650nm on the screen 80 mm away. What is the angle of the third order inside the water casing
A skier starts from rest at the top of a hill that is inclined at10.5 degrees with the horizontal. How far does the skier move along the horizontal portion ofthe snow before coming to rest
A projectile is fired with muzzle speed 150m/s, Where does the projectile hit the ground with what speed
A 1800 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 6 m before coming into contact with the top of the beam, and it drives the beam 14.0 cm farther into the ground before coming to rest.
q1. suppose a chimpanzee swings through the jungle on vines. if it swings from a tree on a 13 m long vine that starts
A rock is thrown directly upward from the edge of the roof of a building that is 32.5 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Neglect any effects of air resistan..
The position of a 300 object is given (in meters) by 5t^3-7.9t^2-45t , where t is in seconds. What is the average net power input during the interval from t=0s to t=1.9s
A man normally consumes 8.4 MJ of food energy per day. He then begins running a distance of 9km four times per week. If he expends energy at the rate of 450W while running at 12 km/h , how much more food energy should he consume daily in order to mai..
A car with mass 1000kg traveling east at 25 (m/s) runs straight into a truck with mass 1500kg traveling west at 10 (m/s). How far do the vehicles slide
An ac power generator produces 24 A rms at 4909 V. The voltage is stepped up to 86000 V by an ideal transformer, What percentage of the power delivered by the generator is dissipated as heat in the power line
a 1.5- block rests on top of a 7.5- block. the cord and pulley have negligible mass and there is no significant
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