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An object is attached to the lower end of a 100-coil spring that is hanging from the ceiling. The spring stretches with 0.160 m. The spring is then cut into two identical springs of 50 coils each. As the drawing shows, each spring is attached among the ceiling and the object. By how much does all spring stretch?
A uranium and iron atom reside a distance R = 51.10 nm apart. The uranium atom is singly ionized; the iron atom is doubly ionized, What is the magnitude of the force on the electron from the uranium ion
A child attempts to drink water by a 100 long straw but finds that water rises only 75 .By how much has the child reduced the pressure in her mouth below atmospheric pressure.
1. the windows in an office building are 4.26 m by 5.26 m. on a stormy day air is blowing at 53.0 ms past a window on
a 50-cm x 30-cm x 20-cm block weighing 150 n is to be moved at a constant velocity of 0.8 ms on an inclined surface of
The excess internal energy of metabolism is exhausted through a variety of channels, such as through radiation and evaporation of perspiration. find the rate at which you lose energy by exhaling humid air
a sled is moving down an incline plane, the mass of the sled is 40 kg. the angle is 35 degrees, coefficient of kinetic friction is 0.3. Find acceleration of the sled
a parallel plate capacitor holds a charge of 30.0 nc when attached to a battery of voltage v. when a fluid is placed
On an essentially frictionless horizontal ice-skating rink, a skater moving at 2.6 m/s encounters a rough patch that reduces her speed by 48 % to a friction force that is 20 % of her weight
A commuter train passes a passenger platform at a constant speed of 35.5 m/s, What wavelength is detected by a person on the platform as the train approaches
An arrow is shot with a speed of 18.5 m/s at an angle of 50 degrees from the horizontal. What are the respective horizontal and vertical component of the initial velocity of the arrow?
in a thundercloud there may be electric charges of 140.0 c near the top of the cloud and 240.0 c near the bottom of the
a piano has been pushed to the top of the ramp at the back of a moving van. the workers think it is safe but as they
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