Explanation:
The life span of a star is quite as many more than 10 billion years. During these many years it would pass through different stages of its life, from nebula to ( perhaps, the current stage) supernova to neutron star or Black Hole.
The stages of the life of star over a span of 13 billion year can be summarized as
the transition stages are
Nebula
→
Blue star
→
Blue-white super-giant star
→
Supernova
→
Neutron star
→Black Hole.
The car travels a distance of 200 kilometers for 1.31 × 10⁵ seconds.
We have:
The velocity of the car, v = 15.3 m/s
The distance traveled by car, d = 200 kilometers.
Now, let the time taken to travel the distance be t.
The formula for the speed of an object, when traveled a distance in a particular time, is given as:
Speed = distance / time
v = d / t
Now, d = 200 kilometers = 20 × 10⁴ m
Therefore,
t = d / v
t = 20 × 10⁴ m / 15.3
t = 131071.89 sec
t = 1.31 × 10⁵ sec
The car travel for a time 1.31 × 10⁵ sec.
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Answer:
C. 640
Explanation:
The minimum force would occur in a frictionless environment and act parallel to any abutting surface.
F = ma = 160(4) = 640 N
Answer:If the mass of both of the objects is doubled, then the force of gravity between them is quadrupled; and so on. ... If the separation distance between two objects is doubled (increased by a factor of 2), then the force of gravitational attraction is decreased by a factor of 4 (2 raised to the second power).