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A ball rolling down an incline travels 6.0m in the first 0.25 seconds, and 24m in the first 0.50 seconds. What is the average speed for the first time interval? What is the average speed for the second time interval? and was is the acceleration from time 1 to time 2?
The temperature of the surface of the sun is 6000K and its radius is 696,000Km. How much energy is the sun radiating into space per second
After crossing the finish line, the marathon runner stops, and then performs a celebratory vertical jump. what was the avg. force of the vertical ground reaction force
question1consider an element of air in the standard atmosphere at a standard altitude of 1000 m. imagine that you
A 14.40 kg block and a 25.3 -kg block are resting on a horizontal frictionless surface. Between the two is squeezed a spring (spring constant = 1108 N/m).
At the interface between the steel and the brass the strain in the steel will be higher than the strain in the brass.
federal statute requires that a car's bumper be designed to withstand a 2.50 mph (1.12m/s) collision with an immovable object without damage to the body of the car. Calculate the average force on a bumper
A Carnot heat engine has a thermal efficiency of 0.510, and the temperature of its hot reservoir is 700 K. what is the work output of the engine during one cycle
Ocean waves of wavelength 100 m have a speed of 6.20 m/s; ocean waves of wavelength 20.0 m have a speed of 2.80 m/s. Suppose that a sudden storm at sea generates waves of all wavelengths. How far is the storm from the coast
The tube of a mercury thermometer has an inside diameter of 0.142 mm. The bulb has a volume of 0.242 cm^3. How far will the thread of mercury move when the temperature changes from 12.1 degrees C to 30.9degrees C
Find the difference of the initial and the final masses for the decay 137N?126C+p. The atomic masses of 137N, 126C,
Four particles, one at each of the four corners of a square with 3m-long edges, are connected by massless rods. The masses of the particles are m1 = m3 = 4kg and m2 = m4 = 5kg. Determine the moment of inertia of the system about the z axis.
two strings with linear densities of g/m are stretched over pulleys, and attached to hanging blocks (string 1 is 20 kg=mass of block)-50 cm away. what is the unkown mass
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