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The spring in a clothespin is compressed 0.40 cm, storing energy in the form of spring potential energy. If the spring is compressed twice as far, the spring potential energy increases with 0.0046 J. What is the force constant, k, for this spring?
Monochromatic light (λ = 570 nm) passes through two slits and onto a screen 4.0 m away. If two nearby bright fringes are separated with 14 mm, what is the slit spacing? If the slit spacing is reduced by a factor of four, what is the new distance amon..
A violent rainstorm dumps 0.9 cm of rainon a city 3 km wide and 6 km long in a 2 h period. How many metric tons (1 ton= 103 kg) of water fell on the city?
An un-tethered block sits on a flatbed truck as it accelerates up an incline that makes an angle of 15° with respect to the horizontal. What is the coefficient of static friction between the truck and the block
A student throws a set of keys vertically upward to her sorority sister, who is in a window 4.00m above. The second student catches the keys 1.50s later. (a) With what initial velocity were the keys thrown? (b) what was the velocity of the keys just..
A vibration sensor, used in testing a washing machine, consists of a cube of aluminum 1.50 cm on edge mounted on one end of a strip of spring steel (like a hacksaw blade) that lies in a vertical plane. what is its frequency of vibration
a point charge q1 4.00nc is located on the x-axis at x 2.15m and a second point charge q2 -6.95nc is on the y-axis
A constant current of I = 15 A exists in a solenoid whose inductance is L = 42.2 H. The current is then reduced to zero in a certain amount of time. If the current goes from 15 to 0 A in a time of 75 ms, what is the emf induced in the solenoid
1ml of distilled water is injected into a length of 3mm diametre tubing and sealed at the other end by folding over, Why doesn't water drain out when the tube is hung vertically
A horizontal wire of length 0.50 m, carrying a current of 6.7 A, is placed in a uniform external magnetic field. When the wire is horizontal, Determine the magnitude of the external magnetic field
An object of mass 5.41 kg is released from rest and drops 2.05 m to the floor. The collision is completely inelastic. How much kinetic energy is lost during the collision
Find the distance in (μm) between the plates of a parallel plate capacitor if, in the dielectric completely filling that region, an electric field of magnitude 67.5 MV/m gives a potential difference of 34.5 kV between the plates.
A light-rail train going from one station to the next on a straight section of track accelerates from rest at 1.2 m/s2 for20 seconds. It then proceeds at constant speed for 1100 m beforeslowing down at 2.2 m/s2 until it stops at the station.
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