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A toy train engines (2.5Kg) is moving 0.25m/s when it collides with a car (1.6Kg) moving 0.15 m/s in the same direction, and they stick together. Find the speed of the engine-car combination as they move off together.
A person pulls a 26kg suitcase using a rope attached to the suitcase at an angle of 28 degrees to the horizontal. The coefficient of static friction of the suitcase with the floor is 0.3 and the coefficient of kinetic friction is 0.20.
The middle C string on a piano is under a tension of 911 N. The period and wavelength of a wave on this string are 3.82 ms, Find the linear density of the string
A soap film with different thicknesses at different places has an unknown refractive index n and air on both sides. Find the ratio tmagenta/tyellow
Find the thermal efficiency and the specific work of a simple Rankine cycle if the maxium temperature and pressure are 1050oC and 5.0 MPa and the minimum pressure is 20 kPa.
q1. a 75-kg person sits on a 3.7-kg chair. each leg of the chair makes contact with the floor in a circle that is 1.5
Two protons are moving directly toward one another. When they are far apart, What is the distance of closest approach?
mileposts mark distance along a highway. a car traveled from milepost 15 to milepost 185. to calculate the average
An archeological specimen containing 8.7 g of carbon has an activity of 1.8 Bq. How old (in years) is the specimen
The platter of a computer hard drive disk rotates at 5400rpm.
Relative to the ground, determine the angle of the velocity vector of the package just before impact.
You are to gracefully crawl in the tube and sit calmly in seat without holding on to anything. The cannon will then be raised to an angle such that your speed through the air at your highest point is 10 ft/sec.
An electromagnet is made by inserting a soft iron core into a solenoid. The solenoid has 1800 turns, radius 2.0 cm, and length 25 cm. What is the relative permeability KB of the iron core
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