The apparent magnitude of the Sun is -26, while Sirius has an apparent magnitude of -1. How much brighter does the Sun appear than Sirius?
What will be an ideal response?
This is a difference of 25 magnitudes. As each 5 magnitudes is a brightness factor of 100 times, then 100 to the fifth power is 10 billion times brighter.
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Buoyancy: A rectangular box of negligible mass measures 5.0 m long, 1.0 m wide, and 0.50 m high. How many kilograms of mass can be loaded onto the box before it sinks in a lake having water of density 1000 kg/m3?
A. 0.50 × 103 kg B. 1.5 × 103 kg C. 2.5 × 103 kg D. 3.5 × 103 kg
Rocks solidified from molten material, either below or above ground, are classified as ______________ rocks
Fill in the blank(s) with correct word
Process of Science: How could you show that the seasons depend on the tilt of the Earth rather than the distance the Earth is from the Sun?
What will be an ideal response?
Newton showed that Kepler's laws are
A) natural consequences of the law of universal gravitation. B) seriously in error. C) actually only three of seven distinct laws of planetary motion. D) the key to proving that Earth orbits our Sun.