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Two identical twins A and B are each 20 year old when B starts on a round trip to a star 10 light years away. If he travels at an average speed of 0.99c, What are the ages of the two twins when B returns?
A charge of q = +7.50 µC is located in an electric field. The x and y components of the electric field are Ex = 4.80 103 N/C and Ey = 7.40 103 N/C, respectively. (a) What is the magnitude of the force on the charge? (b) Determine the angle that th..
Objects of equal mass are oscillating up and down in simple harmonic motion on two different vertical springs. The spring constant of spring 1 is 205 N/m. Find the spring constant of spring 2.
Water flows out of a large open reservoir through a small pipe that opens to the atmosphere 30 m below the level of the water in the reservoir.
A 4.3-m-tall, 50-cm-diameter concrete column supports a 1.0×105{\rm kg} load. By how much is the column compressed
A rod flies with constant velocity past a mark which is stationary in the K frame. In the K frame, it takes the rod Deltat = 20 ns to fly pass the mark. In the K' frame fixed to the rod, the mark moves past the rod in Deltat' = 25 ns. Find (a) the ve..
The period of the orbit is 2.1 hours. The radius of the planet is 4.50 × 106 m. Illustrate what would be the true weight of the satellite if it were at rest on the planet’s surface?
0.015mol of a diatomic gas, with initial temperature 18 degrees C , How much heat is added during this process
An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0°C and rejects heat to a room at 22.5°C. How much heat is discharged into the room
If the bullet leaves the gun at a speed of 177 m/s, and misses by 1.02 m, at illustrate what angle should the gun be aimed so as to hit the target?
Block A is dropped from a height of 2 m. An identical block B slides frictionlessly down a ramp of height 2 m inclined at 30°. Which block is travelling fastest at the bottom of the ramp
a long thin sierra pacific power line kilometers long carries a uniformly distributed charge of 8.1 microcoulombs per
The velocity of a plane relative to still air is 135 mr/hr. The pilot wants to fly straught north over the ground. What is the direction of the wind relative to the ground
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