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In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested traveling at close to the speed of light. Suppose you wish to visit the red giant star Betelgeuse, which is 430 ly away, and that you want your 20,000 kg rocket to move so fast that you age only 28 years during the round trip
How fast, as a fraction of c, must the rocket travel relative to earth?
How much energy is needed to accelerate the rocket to this speed?
Compare this amount of energy to the total energy E0 used by the United States in the year 2015, which was roughly 1.0Ã10^20J. (Erocket/E0)
A uniform bar of length l and mass m is suspended by two equal springs of equilibrium length b and force constant k , as shown in the diagram. find the normal modes of small oscillation in the plane.
The bottle is acting as a Helmholtz resonator. This is the same phenomenon that acts when you blow across the top of the bottle.
1. a double loop of wire of radius 40 mm lies in a plane perpendicular to a uniform magnetic field. the field changes
You measure the length of a distant car to be subtended by an angular distance of 2.0o. If the car is actually 5.0 meter long, determine approximately how far away is the car
Express the right hand side as a matrix operating on the column vector (x1, x2, x3). That is, the transpose of the row vector that starts this line.
A coil with inductance0.100 H and resistance 250 Ω is connected in series with a1.00 µF capacitor and a 110 V (rms) 60.0 Hzalternating current source. The capacitive reactance is_______.
The frequency of sound waves in air from a violin string are around 570 Hz. what is the wavelength of the sound waves
a tire is filled with air at 22oc to a gauge pressure of 240 kpa. after driving for some time if the temperature of air
Two bars of identical mass are at 32 °C. One is made from glass and the other from another substance. What is the specific heat capacity of the other substance
Runner A is initially 8.6 km west of a flagpole and is running with a constant velocity of 5.2 km/h due east. What will be the distance of the two runners from the flagpole
A rubber ball is held 4.0 m above a concave spherical mirror with a radius of curvature of 1.5 m. At time equals zero, the ball is dropped from rest and falls along the principal axis of the mirror. How much time elapses before the ball and its im..
a ball launched from ground level lands 2.75 s later on a level field 32 m away from the launch point. find the
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