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The spaceship Enterprise 1 is moving directly away from earth at a velocity that an earth-based observer measures to be +0.80c. A sister ship, Enterprise 2, is ahead of Enterprise 1 and is also moving directly away from earth along the same line. The veolcity of Enterprise 2 relative to Enterprise 1 is +0.27c. What is the velocity of Enterprise 2, (in terms of c) as measured by the earth-based observer?
If astronauts could travel at v = 0.950c, we on Earth would say it takes (4.20 / 0.950) = 4.42 years to reach Alpha Centauri, 4.20 light-years away. How much time passes on the astronauts' clocks
imagine that each person is about the same distance from the center of the field and can generate the same level of sound intensity. How many people are at game.
Light of wavelength 630 nm passes through a grating and then onto a screen located several meters from the grating. Determine the wavelength of the second source
A 2 kg gun imparts a speed of 500 m/s to a 25 g bullet. what average force is exerted on the shooter's shoulder
A large, thin plastic disk wth diameter D=3.0 meters carries a uniformlydistributed charge of Q= -3.0 x 10^-5 C, Calculate the magnitude q of the charge on the left circular face of the foil
A square loop of wire surrounds a solenoid. The side of the square is 0.1 m, while the radius of the solenoid is 0.025 m. What is the current flowing in the square loop
Three parallel wires 8.0 m long carry each 20 A of current in the same direction. Find the magnitude of the force on each wire
What is the radius of curvature of the mirror. How far would it coast before starting to roll back down.
what is the strength of the electric field 4.0cm from a small glass bead that has been charged to positive 4.0cm?
A 5.0-kg object is pulled along a horizontal surface at by a 15 N force acting 20? above the horizontal. How much work is done by the gravitational force
On a workday an average decibel level of the busy street is 89 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 30 every minute on a weekend, what is the decibel level of street.
A positive charge of 0.900? C is located in a uniform field of 1.05×105 N/C. How close are the two charges
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