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Question
Air has a small, regularly negligible index of refraction. It is 1.0002926. This causes the Sun to actually be below the horizon when it appears to be just on the edge of sinking below it. Assume you are on the sea-shore watching the Sun actually sinking into the ocean. When only its upper tip is still visible, by what fraction of the diameter of the Sun is that tip actually already below the surface? As estimation, take the earth's atmosphere as being of uniform density out to a thickness of 7.500 km, beyond which there is no atmosphere. This means that, with the Earth's radius being 6400. Km, your line of sight due West along ocean surface to the horizon will intersect this upper surface of atmosphere at about 309.9 km from your eye. (The diameter of the sun subtends 0.5000 degrees at your eye.)
Two balls are on a frictionless horizontal tabletop. Ball X initially moves at 10 meters per second, which angle and at what velocity will ball y move
A quantity of ideal gas at 10.0°C and 100 kPa occupies a volume of 1.20 m3. how much volume does the gas occupy
During the spin-dry cycle of a washing machine, the motor speeds up from 30 rad/s to 95 rad/s, What is the magnitude of the angular acceleration of the motor
The escape speed of a particular planet with a radius of 8.600e+6 m is 14,500 m/s. What is the mass of the planet
In a college homecoming competition, eighteen students lift a sports car. Though holding the car off the ground, each student exerts an upward force of 390 N. What is the mass of the car in kilograms? What is its weight in pounds.
A thin rectangular plate of uniform area density ?1 = 1.14 kg/m2 has a length a = 0.540 m and a width b = 0.230 m. find the distance from the origin of the resulting plate's center of mass
A certain speed boat weighs 5,880 N. It can accelerate from 0 to 40 m/s in 5 seconds. (Need to see the math). How large is the net force acting on the boat
An ideal gas occupies 0.14 m3 at an absolute pressure of 1.2×105 Pa and temperature 280 K, How many moles of gas are there
A motorcycle and rider have a total mass equal to 295 kg. What is the net force on the motorcycle
A sample contains 3.5Ã-1019 radioactive atoms with a half life of 10000 years. How many atoms are expected to decay in the first second
One of the harmonic frequencies of tube A with only one end open is 1080 Hz. The next-highest harmonic frequency is 1320 Hz. Find the length of the tube A
A hang glider and its pilot have a total mass equal to 119 kg. While executing a 360° turn, What is the net force on the hang glider
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