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During heavy rain, a section of a mountainside measuring 3.8 km horizontally (perpendicular to the slope), 0.44 km up along the slope, and 2.7 m deep slips into a valley in a mud slide.
Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 1.2 km x 1.2 km and that the mass of a cubic meter of mud is 1900 kg. What is the mass of the mud sitting above a 3.7 m2 area of the valley floor?
A bat can detect very small objects, such as an insect whose length is about equal to one wavelength of the sound the bat makes. If a bat emits chirps at a frequency of 61.0 kHz, and if the speed of sound in air is339 m/s, what is the smallest insect..
2 asteroids are traveling close to each other through thesolar system at a distance of 2.0x10 to the positive 10 rom earth. How far apart are the astroids
An electron drops from n=3 to n=1 in this atom. What is the wavelength in nanometers of the photon emitted in the process? Planck's constant h = 6.626 x 10-34 Joule-sec, 1eV = 1.6 x 10-19 Joules
How many kilograms of ice at a temperature of -11.0 C must be dropped in the water to make the final temperature of the system 34.3 C
A 2.00 m tall basketball player wants to make a goal from 10.0 m from the basket. If he shoots the ball at a 45.0° angle, at what initial speed should he throw the basketball so that it goes through the hoop without striking the backboard.
An elevator is able to raise 1,000 kilogram to a height of 20 meter in10 second. Calculate how much work does the elevator do
A tennis ball gun launches tennis balls at 19.9m/s. It's pointed straight up and launches one ball; 2.0 s later, it launches a second ball, What is the first balls' velocity at that point
You need to produce a solenoid that has an inductance of 2.97 muH. How long, in centimeters, should the tube be
a particle of mass m 4.24times105 evc2 moves in a three-dimensional box with edge lengths l10.54 nm l21.08 nm and
A thin disk of mass 4.9 kg and radius 23 cm is suspended by a horizontal axis perpendicular to the disk through its rim. Find the period of the subsequent simple harmonic motion
A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. What is the magnitude of the magnetic field
suppose you are pulling a large block up an inclined plane. what factors determine how much force is necessary to pull
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