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At the top of a hill with slope angle 25 degrees a snow sled is moving at 5 m/s. The sled travels 30 m down the hill before reaching the bottom. If the coefficient of kinetic friction between the sled and the snow is 0.4, how fast will the sled be traveling at the bottom
A simple pendulum is made from a 0.691-m-long string and a small ball attached to its free end. how much time elapses before it attains its greatest speed
A certain amount of oxygen gas occupies a volume of 12 liters when its temperature is 20C and its pressure is 1 atm. Calculate the number of grams of oxygen
A cosmic ray travels 60 {\rm km} through the earth's atmosphere in 420 \mu s, as measured by experimenters on the ground
Charges of 4.0 mC and - 6.0mC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field created by these two charges
A stainless steel orthodontic wire is applied to a tooth, as shown in the figure above. The wire has an unstretched length of 2.7 cm and a diameter of 0.2 mm. What is the tension in the wire
A dentist's drill accelerates from rest at 600rad/s2 for 2.00s and then runs at constant angular velocity for 8.1s . Through how many total revolutions has the drill turned
An unknown resistor R is connected to a 15.0 ? resistor, and the combination is attached to an ideal battery. Determine the two possible values for R
A diver shines a flashlight upward from beneath the water at a 43.7 %u2218 angle to the vertical. At what angle does the light leave the water
A cat dozes on a stationary merry-go-round, at a radius of 6.0 m from the center of the ride. What is the least coefficient of static friction between the cat and the merry-go-round
Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 12.1 m/s toward the east, What was the initial speed of the northward-moving vehicle
Find out the frequency of a sound wave moving through iron at 25 degrees Celsius with a wavelength of 0.601m.
A 2 kg object is dropped and falls 20m, at which point it is caught and a net force of 100N is exerted on the object. How much time did the object take to fall
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