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A spaceship of length L moves with a speed 7c/12 with respect to the ground. A ball is thrown from the back of the ship to the front. The speed of the ball with respect to the ship is c/3. Apply the Lorentz transformations to find: (a) How much time does the ball spend in the air, as viewed by an observer on the ground.(b) How far does the ball travel as measured by the ground observer. (note: define two events and then apply the Lorentz transformation).
Police determine skid marks 83 m long on the highway showing where the car made an emergency stop. Assume that the acceleration was -10 m/s2 (about the highest for dry pavement), how fast was the car going.
A point source emits sound waves with a power output of 130 W. At what distance will the decibel reading be 120 dB, which is noise level of a loud indoorrock concert?
What diameter must a helium filled balloon have to float with neutral buoyancy? The mass of the empty balloon is 2.0g
The isotope 15N undergoes radioactive decay to form 15C. What charged particle is emitted in the decay process? how much kinetic energy in MeV is given to the particle
An electron is in the ground state of an infinite square well. The energy of the ground state is E1 = 0.37 eV. What is the width of the square well
A parallel-plate capacitor has fixed charges q and -q. The seperation of the plates is then doubled. How much work must be done in doubling the plate seperation from d to 2d
The electric starter in an automobile equipped with a 12 V battery draws a current of 90.00 A when in operation. What amount of electric energy has been withdrawn from the battery
A cylindrical storage tank has a radius of 1.43 m. When filled to a height of 3.60 m, What is the density of the solvent
Four identical masses of 2.7 kg each are located at the corners of a square with 1.5 m sides. What is the net force on any one of the masses
A gymnast of mass 56.0 {rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 {rm m/s^2} for the acceleration of gravity.
State Newton's three laws of Motion and What is the difference between elastic collision and inelastic collision
You've signed up for a trip to Mars. After being cooped up in the tight space capsule for months, you are very excited to finally arrive and take a standing leap straight upward. How high will you jump
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