Mars has virtually no magnetic field
Indicate whether the statement is true or false
TRUE
You might also like to view...
A flat plate is in a solar orbit 150,000,000 km from the sun. It is always oriented normal to the rays of the sun and both sides of the plate have a finish which has a spectral absorptance of 0.95 at wavelengths shorter than 3 ?m and 0.06 at wavelengths longer than 3 ?m. Assuming that the sun is a 5550 K blackbody source with a diameter of 1,400,000 km, determine the equilibrium temperature of the plate.
GIVEN
• A flat plate in solar orbit oriented normal to the rays of the sun
• Distance from the sun (R) = 150,000,000 km = 1.5 × 1011 m
• Spectral absorplatace (??) of both sides ??1 = 0.95 for ?1 < 3 ?m ??2 = 0.06 for ?1 > 3 ?m
FIND
• The equilibrium temperature of the plate (Tp)
ASSUMPTIONS
• The sun is a black body at Ts = 5550 K
• Sun diameter (Ds) = 1,400,000 km = 1.4 × 109 m
SKETCH
A 100.0 kg mass is blown apart into a 95.00 kg piece and a 5.000 kg piece. After the blast, the two masses are moving apart with a relative velocity of 100.0 m/s. The kinetic energy of the 5.000 kg mass after the explosion is
A. 6,850 J. B. 7,500 J. C. 9,570 J. D. 11,500 J. E. 22,560 J.
This graph shows the number of asteroids with different orbital periods. Notice the gap indicated by the downward-pointing black arrow. What does this graph tell us about this gap?
A) There are few if any asteroids at the indicated orbital period of about 4 years. B) There are more asteroids concentrated at the orbital period indicated by the arrow than at any other orbital period. C) Asteroids with an orbital period of about 4 years are all located very close together; so close that collisions occur frequently. D) There are exactly 495 asteroids with an orbital period of 4 years.
What is an unusual theoretical characteristic of quarks?
a. They have fractional charges. b. They are outside the concept of electric charge—it just does not apply to them. c. Even the electron is composed of quarks. d. Even in quantum mechanical terms, quark momentum is not conserved. e. They combine to form leptons.