Which of the following statements best explains why all the planets orbit the Sun in the same direction and in nearly the same plane?
A) The planets formed from a disk of rotating gas, and their orbits therefore orbit as this gas did.
B) The Sun's rotation spun out the planets as it formed.
C) No one knows: planets form randomly, so it's a puzzle why they orbit with such a pattern.
D) The Sun's gravity is strongest as its equator, so it pulled all the planets into this orbital alignment.
A) The planets formed from a disk of rotating gas, and their orbits therefore orbit as this gas did.
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The region in the H-R Diagram where evolved, low mass stars are converting helium to carbon in their cores is the ________
Fill in the blank(s) with correct word
A segment of wire carries a current of 25 A along the x axis from x = ?2.0 m to x = 0 and then along the y axis from y = 0 to y = 3.0 m. In this region of space, the magnetic field is equal to 40 mT in the positive z direction. What is the magnitude of the force on this segment of wire?
a. 2.0 N b. 5.0 N c. 1.0 N d. 3.6 N e. 3.0 N
A puck with a mass m1 = 50 g moving at 1.0 m/s approaches a stationary puck with a mass m2 = 100 g on a frictionless air table,
and they undergo a sudden two-dimensional elastic collision. After the collision, both pucks have identical speeds, but travel in different directions. What is the angle between the original and final paths of puck with mass m1? A) 30° B) 60° C) 90° D) 120° E) 150°
Conductors: A thin spherical copper shell of radius 9.5 cm carries an excess charge of -4.2 nC. How many excess electrons are on (a) the outer surface of the shell, and (b) the inner surface? (e = 1.60 × 10-19 C)
What will be an ideal response?