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It's nighttime, and you've dropped your goggles into a swimming pool that is 4.5 m deep. If you hold a laser pointer 1.4 m directly above the edge of the pool, you can illuminate the goggles if the laser beam enters the water 2.8 m from the edge. How far are the goggles from the edge of the pool?
A horizontal mass-spring system consists of a 0.32-kg mass attached to a spring with a spring constant of 25 N/m. It is observed that at t = 0 the displacement is x = 0 however the velocity is +2.5m/s. What is the maximum value of the acceleration?
Gliders with masses 0.150kg and 0.220kg are at rest on an air track with a spring between them. Find the speed of the heavier glider
A speed boat is moving across the surface of a lake. At time t1 = 0 with the components of its velocity are vx = 25 m/s and vy = -10 m/s. At time t2 = 15 s the components are vx = 12 m/s and vy = -21 m/s. What are the magnitude and direction of the a..
A 0.03 kg bullet hits asteel plate and melts and splatters on impact. Assuming thatthe bullet recieves 80% of the collision energy, at what minimium speed must it travel to melt on impact?
A swimmer at the bottom of a pool 3m deep looks up and sees a circle of light. If the index of refraction of the water in the pool is 1.33, find the radius of the circle.
Find how long would an open organ pipe need to be to produce a frequency of 400 Hz
A tank of water sits at the edge of a table of height 2.2 m. The tank springs a very small leak at its base, and water sprays out a distance of 1.7 m from the edge of the table
A particle of mass 7.7 × 10-8 kg and charge +8.0 ?C is traveling due east. It enters perpendicularly a magnetic field whose magnitude is 3.2 T, How much time does the particle spend in the magnetic field
The distance between the lenses in a compound microscope is 18 cm. The focal length of the objective is 1.5 cm. what must be the focal length of the eyepiece
A 0.60 nF parallel-plate capacitor has plate area A = 1.4×10?4 m. what is the plate separation
0.16mol of argon gas is admitted to an evacuated 40cm3 container at 10 ?C. The gas then undergoes an isochoric heating to a temperature of 500 ?C
A satellite of the Earth has a mass of 99kg and is at an altitude of 1.95x106 m. (Assume that U = 0 as r goes toinfinity.) What force does the satellite exert on the Earth
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