Recent content by AClass

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    Specialy theory of relativity [Answer Check]

    40 years (2) +(0.20)(40 years)= 88 years Means, the parent is on route for 80 years [40 Years there, then 40 years back], plus since she is traveling 10% slower than the speed of light 20% slower since she is going there and back. I realize where I went wrong. I went to verify my notes. The...
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    How Does Relativistic Speed Affect Spaceship Length?

    I'm not getting another answer for a) From what I was taught, L is the relativistic contracted distance measured by an observer moving. [Astronaut] Lo is the proper distance measured by a observer stationary. [Planet Observer] For b) I realize where I went wrong. I used a different technique...
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    How Does Relativistic Speed Affect Spaceship Length?

    Homework Statement A spaceship travels past a planet at a speed of 0.80 c as measured from the planet’s frame of reference. An observer on the planet measures the length of a moving spaceship to be 40 m. a) How long is the spaceship, according to the astronaut? b) At what speed would the...
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    Specialy theory of relativity [Answer Check]

    Homework Statement a 30-year old female astronaut leaves her newborn child on Earth and goes on a round-trip voyage to a star that is 40light-years away in a spaceship traveling at 0.90c. what will be the ages of the astronaut and her son when she returns? Homework Equations \Delta t =...
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    Calculate Angles for Diffraction Grating 1st & 2nd Order Maxima

    Homework Statement Light with wavelengths of 520 nm and 630nm passes through a diffraction grating that contains 6000 lines/cm. 1) Calcualte the angles for the first and second order maxima that would appear on the screen Homework Equations sin(Theta)m = m(Lamda)/d The Attempt at a...
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    Coulombs Law. Calculate Charge Magnitude and Direction

    Homework Statement Three charges are arranged as shown in the diagram below. Their magnitudes are: q1 = +2.5 x 10^-17 C q2 = +3.0 x 10^-17 C q3 = +3.5 x 10^-17 C (its a right angle triangle, with 50 cm as the hypotenuse, 40 cm as the horizontal, and 30 cm as the vertical) Figure image...
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    Using Coulombs Law-Comparative Analysis

    Would that mean that F2 is (3/2) of F1? if they were combined. Because I obtained the same answer.
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    Kepler's constant and average radius of orbit

    I obtained similar results. Wondering if anyone can verify if they are correct.
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    How Fast Were the Spacecrafts Traveling Before Separation?

    Your velocity seems to be one x10 too big. v = (12.4 x 10^7 kg km/hr)/(3.6 x 10^4 kg) = 3.44 x 10^3 km/hr Noted for reference.
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    Total Energy of a Geosynchronous Satellite

    Homework Statement Calculate the total energy of a geosynchronous satellite (one that orbits over a fixed spot) with a mass of 1500kg, orbiting Earth at a height of 325km with an orbital speed of 5000m/s Homework Equations ET=Ek+Ep Ek=(0.5)(m)(v)^2 Ep=(m)(g)(h) The Attempt at a Solution...
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    Satellite Velocity Homework: Calculate Distance, Acceleration, and Speed

    Yes, they failed to provide a direction. All that was explained is in the direction towards the earth.
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    Cosmic Calculations and Kinetic Energy

    Homework Statement A satellite with a mass of 5.00 x 10^2kg is in a circular orbit, whose radius is 2(radius of the earth), around earth. Then it is moved to a circular orbit with a radius of 3(radius of the earth). a) Determine the satellite's gravitational potential energy from the...
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    Satellite Velocity Homework: Calculate Distance, Acceleration, and Speed

    c) v=sqt(GMe/r) v=sqt(G(5.98x10^24kg)/9.4168x10^6) v=6509.6776m/s I had forgotten to take the square root. for b) Other sources suggested that 4.5N/Kg is equal to 4.5m/s^2, that being its only acceleration. Seems that someone else who has taken my course before had confirmed that...
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    Satellite Velocity Homework: Calculate Distance, Acceleration, and Speed

    Homework Statement A satellite is designed to orbit Earth at an altitude above its surface that will place it in a gravitational field with a strength of 4.5 N/kg. a) Calculate the distance above the surface of Earth at which the satellite must orbit. b)Assuming the orbit is circular...
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