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The Lorentz-Fitzgerald Contraction

The USS Enterprise approaches the planet Seti Alpha 5 at a speed of 0.800c. Captain Kirk observes an airplane runway on the planet to be 2.00 km long. The air controller on the planet says that the runway on the planet is how long?

Chemical differentiation

How does chemical differentiation explain the distribution of material within terrestrial planets?

Superior planet

Superior planet can have only one X with the Sun during its synodic period, while an inferior planet can have two. What is X


What does it mean when scientist said reality is rational?

Spacecraft orbiting -- need to find the period

A spacecraft is in orbit around Jupiter. The radius of the orbit is 3.0 times the radius of Jupiter (RJupiter = 71,500 km). The gravitational acceleration at the surface of Jupiter (the surface is defined as the above radius) is 23 m/s2. Without using any other information about Jupiter, what is the period of the spacecraft's

Mass, force, gravity: What is more important, the planet Uranus or the physician?

The mass of Uranus is 9x10 to the 25th kg. Its mean distance from the earth is about 3x10 to the 12th meters. Estimate your mass in kilograms at birth. Then find the force exerted upon your body at birth by Uranus. Is it very large? Next assume that you were delivered by a 100 kg physician who was on the average about 10 cm from

Using a spectrograph...

A.) How can a spectrogrph be used to indicate that the rings of Saturn are not solid? B.) Astronomers in the 1940's had difficulty measuring the amount of water in the Martian atmosphere spectroscopically, becuase the Earth's atmospheric water got in the way. They could not yet fly above our atmosphere. How could the spectral l

Physics: Calculate a planet's interior gravity field.

Assume a spherical, uniform planet with mass M and a radius R. a) Develop a relationship which will the give the gravity field of a planet at any point beneath its surface which is distance r from the center. b) Use the mass and radius of the earth to find the earth's field at a point halfway to the surface.

Basic Thermal....Other Problems that are basic.

1.A space vehicle returning to Earth is fist slowed by its motors to a speed of 450m/s and then is slowed further to 100m/s by air resistance in the atmosphere. Its average heat capacity is 0.60kJ/kg-Cdegrees. Find the increase in its temperature on the assumption that 70% of the heat produced is absorbed by the vehicle and th

Velocity and acceleration

On another planet, Jim throws a ball directly up into the air. The velocity of this ball is a linear function of t. He finds that the velocity of the ball at 1 second is 44 meters/second. At 4 seconds, it is -49 meters/second. a.) Find v(t), the velocity of the ball at time t seconds. b.) Find a(t), the acceleration of t