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Two toy locomotives approach each other along the same line, and upon collision both stop dead still. One locomotive has three times the speed of the other and the sum of their masses is 4.38 kg.
What is the mass of the faster locomotive?
What is the mass of the slower locomotive?
A man pushes a lawnmower for 13.1 m along a handle that makes a 28.2° angle with the ground. He pushes with a force of 42.8 N even as the force of friction between the lawnmower and the ground is 13.7 N.
A circular coil made up of 10 windings of wire has a circumfrence of 2 m. The coil is perpendicular to a magnetic field of strength 10 T. what is the change in magnetic flux through the coil
A rat with an emissivity of .40, total area of .15m^2 and a temperature of 37C. How much energy must the rat's body generate to maintain a skin surface of 37C in a 24 hour period
a falling flower pot passes a 1.5 m tall window of an apartment building in a time of .16 s. how fast was the pot falling at the top of the window? from what height above the top of the window was the pot dropped?
An arrow is launched vertically upward from a crossbow at 97.9 m/s. Ignoring air friction, what is its instantaneous speed at the end of 10.0 s of flight? What is its average speed up to that moment? How high has it risen? What is its instantaneou..
When you take a bath, how many kg of hot water (49 oC) must you mix with cold water (13 C) so that the temperature of the bath is 36 oC? The total mass of the water (hot and cold) is 191-kg.
football player kicks a ball with a speed of 22.1 m/s at an angle of 46° above the horizontal from a distance of 38 m from the goal line. What is the vertical velocity of the ball at the time it reaches the goalpost
An athlete swings a ball, connected to the end of a chain, in a horizontal circle. What is the centripetal acceleration of the ball at 8.28 rev/s
What is the focal length of the contact lenses that will enable him to see distant objects clearly
An object is to the left of a thin lens. The lens forms an image on a screen that is 2.60 m to the right of the object. Is the image upright or inverted
Atoms are typically spaced about 0.2 nm apart. At that spacing, how many atoms would be found in a line 4.93 inches long?
You push a 2.7 kg box with a force of 23.8 N along a level floor, but a frictional force of 3.3 N opposes the motion
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