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Two hikers begin on opposite sides of a circular lake and walk around the lake in the same direction. One walks three times as fast as the other. The circumference of the lake is L. How far does the faster hiker walk before catching up to the slower one?
An aquarium contains a 5-cm layer of water (n = 1.33) floating on top of carbon tetrachloride (n = 1.461). If the angle of incidence into the water from the air is 30, what is the angle of refraction into the carbon tetrachloride?
In a science fiction movie, a 100 g base ball travelling with a speed of 60 m/s and an electron travelling at a speed of 1.2 x 10^8 m/s are approaching each other for a head-on collision
Ann was reaching up to grab a box of cereal that was on top of the refrigerator. She had extended her arm as well as stood on her tip-toes to reach the box. Which primary muscle allowed Ann to extend her elbow and which 2 primary muscles allowed h..
One way to measure on another planet or moon by remote sensing is to measure how long it takes an object to fall a given distance. A lander vehicle on a distant planet records the fact that it takes 3.17 for a ball to fall freely 11.26.
Calculate the rest energy of an electron in joules and Calculate the rest energy of an electron in MeV (1MeV=1.60×10?13J)
A 1.0--tall vertical tube is filled with 20o water. A tuning fork vibrating at 574 is held just over the top of the tube as the water is slowly drained from the bottom.
Explain how far x can a man who weighs 447 n from the right support which is 1.1 m from the right side of the board before the board tips?
A projectile is projected from the origin with a velocity of 25.0 m/s at an angle of 50.0 degrees above the horizontal. What is the time of maximum height of the projectile? A.)2.03 s B.)3.45 s C.)1.95 s D.)2.67 s E.)3.01 s
some types of glass have a range of indices of refraction of about 1.4 to 1.7. What is the range of the polarizing angle
what is work done on package by friction.
Suppose 1.0 mol of a monatomic ideal gas initially at 10 L and 350 K is heated at constant volume to 700 K, What is the efficiency of the cycle
A 100kg block is sitting at rest on a horizontal table. what is the force the table exerts on the block
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