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A 20-g bead is attached to a light 120 cm-long string as shown in the figure. If the angle α is measured to be 18o, what is the speed of the mass?
An automobile has a total mass of 1700 kg. It accelerates from rest to 40 km/h in 10 s. Assume each wheel is a uniform 32 kg disk. find the total kinetic energy of each wheel
The weight of the atmosphere above 1 m^2 of Earth's surface is about 100,000 N. Density of course, become less with altitude. But suppose the density of air were a constant 1.2 kg/m^3. Calculate where the top of the atmosphere would be.
In case of wilson hartnell governor there two main springs and there are one auxiliary spring. And nature of springs are tension always how it can possible? When sleeve will move downward than i will compress but most of the book is explaining spring..
The membrane of the axon of a nerve cell is a thin cylindrical shell of radius r = 10-5 m, length L = 0.14 m, and thickness d = 10-8 m. Find the electric field through the membrane
a proton is located at the origin and a second proton is located on the x-axis at x 6.78 fm 1 fm 10-15 m.a calculate
A bumper car with mass m1 = 113 kg is moving to the right with a velocity of v1 = 4 m/s. A second bumper car with mass m2 = 94 kg is moving to left with a velocity of v2 = -3.2 m/s.
A person with a weight of 241 lb stands on two feet with their weight equally distributed between the two shoes, What is the pressure on each shoe independently
A model airplane is being flown on a guideline that can sustain at most 180 Newton of tension. Determine the radius of the smallest horizontal circle in which the plane can be flown
A curve of radius 65 m is banked for a design speed of 100 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely make the curve
A solid circular disk has a mass of 1.2 kg and a radius of 0.18 m. Each of three identical thin rods has a mass of 0.15 kg. Find the moment of inertia of the stool with respect to an axis that is perpendicular to the plane of the disk at its center
Common thermometers are made of a mercury column in a glass tube. which has the larger coefficient of linear expansion
A Young's interference experiment is performed with monochromatic green light (y=470nm). The separation between the slits is 0.120 mm, How far away from the slits is the screen
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