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1. A young girl gives her toboggan a push of 4.0 m/s up a hill. It slides up the hill slowing down at an acceleration of 8.0 m/s2 [down]. It comes to a stop and then slides back towards her speeding up at the same rate as it slowed down on the way up. If the girl has to run 48 m down the hill from where it first was pushed to get to where her sled stopped, find the elapsed time for the journey.
A long straight wire is aligned north-south and carries current in the northerly direction. What is the direction of the magnetic field created directly above the wire
a parallel-plate air capacitor of area a25.0cm2 and plate separation d3.80mm is charged by a battery to a voltage 58.0
A charge of -2.9 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.110 m. The charges on the circle are +4.55 µC at the position due east and -3.6 µC at the position due nor..
A cargo plane is flying horizontally at an altitude of 13.5 km with a constant speed of 984 km/hr when a large crate slides out of the rear of the plane. How long does it take the crate to hit the ground
a 117-cm-long 3.00g string oscillates in its n 3 mode with a frequency of 180hz and a maximum amplitude of 5.00mm.
A copper wire of cross sectional area A=1.7 mm2 and Lenght L=1 m carries a current of I=6.4 A at the temperature of T1= 20 0C.
The owner of a van installs a rear-window lens that has a focallength of -0.299 m. When the owner looks out through the lens at a person standing directly behind the van, the personappears to be just 0.236 m fromthe back of the van, and appears to..
The image produced by a concave mirror is located 27 cm in front of the mirror. How far in front of the mirror is the object located
A blue ball is thrown upward with an initial speed of 22.4 m/s, from a height of 0.5 meters above the ground. 2.7 seconds after the blue ball is thrown, How long after the blue ball is thrown are the two balls
A person walks into a room that has, on opposite walls, two planemirrors producing multiple images. Find the distances from theperson to the first three images seen in the left-hand mirror, whenthe person is 7.00 ft fromthe mirror on the left wall an..
A spring in a toy gun has a spring constant of 9.05 N/m and can be compressed 16 centimeter beyond the equilibrium position. Determine the muzzle speed of the pellet
A helicopter has blades of length 2.5m, extending out from a central hub and rotating at 4.00 rev/s. If the vertical component of the Earth's magnetic field is 50.0μT, what is the emf induced between the blade tip and the center hub?
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