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A 26.2-kg dog is running northward at 2.21m/s, while a 5.30-kg cat is running eastward at 2.83 m/s. Their 67.2-kg owner has the similar momentum as the two pets taken together. Find the magnitude and direction of the owner's velocity.
The Sun has an apparent magnitude of -26.8 and absolute magnitude of 4.8 Calculate the apparent magnitude it would have at the distance of αCentauri (1.3 pc).
A 0.49 kg block attached to a spring with force constant 150 N/m is free to move on a frictionless, At that instant, find the force on the block
A projectile of mass 2.0 kg approaches a stationary target body at 5.0 m/s. The projectile is deflected through an angle of 59.5° and its speed after the collision is 2.8 m/s. What is the magnitude of the momentum of the target body after the collisi..
A ball and a thin plate are made from different materials and have the same initial temperature. At what temperature will the ball fall through the hole in each arrangement
At the top of a 30m hill is a 5kg mass. It is loaded into a spring cannon. What is the ration of Energy before/Energy after
a typical car under hard braking loses speed at a rate of about 6 ms2. the typical reaction time to engage the brakes
18 g of helium gas are placed in a cylinder with a movable piston. The gas is compressed very slowly from a state of ( p1 = 5.5atm, v1 = 32.7 × 10^3 m3) to a state of (p2 = 17atm, v2 = 11 × 10^3 m3 )
A pitched ball is hit by a batter at a 45°angle and just clears the outfield fence, 98 m away. find the velocity of the ball when it left the bat
Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 20 m that makes an angle of 45, Calculate Tarzan's speed just before he reaches Jane
Police investigators, examining the scene of an accident involving two cars, measure 72-m-long skid marks of one of the cars, Estimate the initial speed of that car assuming a level road
During this experiment the first step in the procedure was the measurement of the string's mass and total lenght, Calculate lthe linear mass density of the string in g/cm
An element in its solid phase has mass density 2100kg/m3 and number density 4.39×1028atoms/m3. What is the element's atomic mass number
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