Relate Kepler's Second Law to the speeds of the planets
What will be an ideal response?
In equal time intervals, the lines that connect each of the planets to the Sun must all sweep out equal areas. The longer this line, the slower the planet could move and still sweep out this constant area. Thus more distant planets orbit the Sun more slowly, and each planet will speed up at perihelion and slow down at aphelion.
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A 5.0-kg mass with an initial velocity of 4.0 m/s, east collides with a 4.0-kg mass with an initial velocity of 3.0 m/s, west. After the collision the 5.0-kg mass has a velocity of 1.2 m/s, south. What is the magnitude of the velocity of the 4.0-kg mass after the collision?
A. 2.0 m/s B. 1.5 m/s C. 1.0 m/s D. 2.5 m/s E. 3.0 m/s
Which of the following is NOT a type of plate boundary?
What will be an ideal response?
The proper abbreviation for ‘kilohertz' is __________
Fill in the blank(s) with correct word
A telescope with a 60 mm objective lens collects how many times as much light as does your eye's 6 mm exit pupil?
A) 5 times B) 10 times C) 25 times D) 100 times E) 250 times