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Amateur radio operators often refer to their radio waves by wavelength. What are the estimated frequencies of the 160-m, 15-m, and 2-m wavelength amateur radio bands? Please show solution
Two automobiles, each of mass 1.500*10^3 kg, travel in the same direction along a straight road. find the translational kinetic energy of the center of mass
A mover's dolly is used to deliver a refriger- ator up a ramp into a house. What gravitational potential energy is gained by the refrigerator
when 105 mL of water at 22 C is mixed with 68mL of water at 95 C, what is the final temperature? suppose no heat is lost to the surroundings and density of water is 1 g/mL.
A yo-yo has a rotational inertia of 1140 g·cm2 and a mass of 81.3 g. Its axle radius is 3.27 mm, and its string is 106 cm long, translational kinetic energy, rotational kinetic energy
If a 0.34kg kickball is rolled towards a kicker at 8.1m/s and then is kicked at its velocity of -12.0m/s, what impulse is acting in the kickers foot
A precious-stone dealer wishes to find the specific heat capacityof a 0.040-kg gemstone. What is the specific heat capacity of the specimen
Amtrak's 20th-Century Limited is en route from Chicago to New York at 120km/h when the engineer spots a cow on the track. What is the magnitude of the train's acceleration
An airplane traveling at half the speed of sound emits a sound of frequency 5.96 kHz. At what frequency does a stationary listener hear the sound as the plane approaches
A child is walking toward a wall at a speed of 1.00m/s in a direction at right angles to the wall. what is the frequency of the whistle
a straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder, What is the density of a 220 g rock
A 62 kg woman cheats on her diet and eats a 637 Calorie (637 kcal) jelly donut for breakfast. How many stairs must the woman climb to perform an amount of mechanical work equivalent to the food energy in one jelly doughnut
A satellite with a mass of 310 kg moves in a circular orbit 3.00 multiply.gif 107 m above the Earth's surface. What is the gravitational force on the satellite
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