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1. On a hot summer day a young girl swings on a rope above the local swimming hole. When she lets go of the rope her initial velocity is 2.65 m/s at an angle of 35.0° above the horizontal. If she is in flight for 1.10 s, how high above the water was she when she let go of the rope?
2. The "hang time" of a punt is measured to be 3.50 s. If the ball was kicked at an angle of 73.0° above the horizontal and was caught at the same level from which it was kicked, what was its initial speed? (Neglect air resistance.)
A cable 24 m long and 1.5 mm radius is stretched by a force of 550 N. If the length after stretching is 24.05 m, what is Young's modulus for the cable
Two rigid rods are oriented parallel to each other and to the ground. The rods carry the same current in the same direction. The length of each rod is 0.90m, and the mass of each is 0.078 kg. One rod is held in place above the ground, while other flo..
The electric field strength is 2.40 x 10^4 N/C inside a parallel-plate capacitor with a 1.40 mm spacing, What is the electron's speed when it reaches the positive plate
If a nearsighted person has a far point df that is 3.50m from the eye, what is the focal length f1 of the contact lenses
Larry is standing at the edge of a vertical cliff 210m about the sea. how far has the rock traveled horizontally when it hits the water
A 2.0 kg object moving with a velocity of +6.0 m/s collides with a 6.0 kg object that is initially at rest. Find the energy lost in the collision.
At a distance r1 from a point charge, the magnitude of the electric field created by the charge is 345 N/C. At a distance r2 from the charge, the field has a magnitude of 120 N/C
A slide projector needs to create a 97 cm high image of a 2.0 cm tall slide, How far should you place the lens from the slide
Vector and scalar quantities. Part (a) Which of the following below is a scalar quantity? Part (b) What information do vectors quantities convey? Part (c) Which of the following is a vector quantity?
Consider the chemical reaction given. The initial concentrations of CO(g) and H2O(g) 0.35 M and 0.40 M respectively, What is the value of the equilibrium constant for this reaction
A 0.170-kg piece of aluminum that has a temperature of -155° C is added to 1.5 kg of water that has a temperature of 2.5° C. determine the mass of water that has been frozen into ice
A submarine dives to a depth of 157 feet in the ocean. What is the force (in pounds) acting on a hatch
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